All posts by Sipxtech

The empowerment of 5G provides new possibilities for the construction of “smart hospitals”

The concept of “smart medical care” has a long history, and the exploration of informatization construction has never stopped. In 2018, Shantou launched the Three-Year Action Plan for Information Infrastructure Construction in Shantou (2018-2020); in 2019, it launched the Action Plan for Accelerating the Development of the 5G Industry in Shantou (2019-2022), which requires the active promotion of 5G technology. Integrated development with medical and health care, and effective in medical and health institutions at all levels.

The empowerment of 5G provides new possibilities for the construction of “smart hospitals”. On the other hand, looking at the construction of “Internet + medical care” in Shantou in recent years, we can see that under the multiple drives of policy support, market demand and the background of the epidemic, the construction of smart medical care in Shantou presents a new scene.

PDA has modules such as patient information list, doctor’s order inquiry, doctor’s order execution, nursing documents, vital signs, infusion monitoring, allergy management, specimen collection, supplementary bookkeeping, and memorandum. By scanning the wristband, the patient’s identity can be checked, the PDA can query the patient’s doctor’s order, and the doctor’s order can be checked by scanning the matching two-dimensional barcode on the patient’s wristband and the drug label, preventing medication errors, and accurately recording the execution time of the doctor’s order and the execution of the nurse. and other information, record the infusion process in an objective and detailed manner, and reduce and avoid the occurrence of adverse infusion reactions.

Nurses enter the patient’s condition in real time at the bedside, and will automatically generate temperature sheets, nursing records, and various assessment sheets; when nurses visit patients, they scan the 2-dimensional barcode of the ward to automatically generate real-time inspection records, ensuring graded nursing inspections. implementation of the system.

During the epidemic, how to reduce the risk of cross-infection while meeting the demand for medical treatment is an important issue for hospitals and patients. Internet hospitals stand out by virtue of their advantages of contactless medical treatment, and many Shantou hospitals have joined the launch one after another, and the introduction of multi-functional self-service terminals has opened up online and offline links.

It is one of the specific applications of 5G empowerment. On October 19, 2020, Xiao Zhe, the chief physician of the neurosurgery of the hospital, used this form to perform two brain surgeries, the left middle cerebral aneurysm microsurgery and the craniopharyngioma microsurgery. Live broadcast nationwide.

Guided by the health needs of local populations, Smart Health has released smart health products such as National Health Information Interconnection, Smart Home-Medical Cloud, and Smart Maternal and Child Cloud. And through scenarios such as graded pre-diagnosis, collaborative diagnosis and treatment, online services and comprehensive management, efforts are made to realize the county-level medical community.

Smart Interconnect adheres to the development concept of innovation, interconnection, integration, openness and sharing, and builds a new service model of “Internet + medical health”. The product series involves Internet hospitals, prescriptions, nursing care, commercial insurance, payment and other aspects to realize the interconnection of medical care and various aspects.

Smart IoT takes the basic medical Internet access platform as the core, applies the smart hospital IoT technology system and IoT multi-network integration network architecture, covers three aspects of patients, medical care and hospital management, and integrates with the information system to promote medical services. Full process automation. Actively explore innovative applications in the field of 5G smart medical care, and jointly promote the construction of telemedicine, regional cooperation, smart medical treatment, smart IoT, artificial intelligence and medical informatization,

Utilizing the “large bandwidth, low latency, and high reliability” features of 5G, functions such as data collection and real-time transmission of emergency equipment between ambulances and hospitals, and high-definition audio and video interaction (rescue guidance) are realized. In the future, in the pre-hospital emergency linkage system supported by 5G technology, from the moment the patient is lifted into the 120 ambulance and the emergency personnel touch the patient, the patient’s basic physical sign data, condition assessment images, and emergency condition records will be displayed in the form of data. The millisecond-level speed is transmitted to the hospital emergency center in real time without damage, and 120 ambulances and the hospital emergency team have a “zero jam” remote video call to discuss and guide the pre-hospital treatment plan. At the same time, the 5G network can also efficiently plan and optimize the design of the emergency diagnosis and treatment process, thereby shortening the response time from pre-hospital calls to in-hospital emergency response, and striving for greater vitality for patients.

In terms of patients, Smart IoT provides location navigation services and convenient family escort services for patients through the hospital navigation system and shared escort room; in terms of medical care, a digital ward has been established, which allows doctors and nurses to clearly grasp the location and condition of patients. , infusion situation, etc.; in terms of hospital management, it provides full business process management for the hospital’s logistics operation and maintenance, including IT operation and maintenance management, environmental energy consumption management, medical waste management, etc., using information systems and sensor monitoring equipment to achieve operation and maintenance Managed intelligent services.

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The official version of iOS 13.2 is finally here, let’s see if it’s worth upgrading

Looking forward to, looking forward to, if you read the article published by Mingmei Unlimited yesterday, you should know that Mingmei Unlimited predicted the release time of Apple’s iOS 13.2 official version, and also Very accurate.

This is not just when all Apple users are focusing on the new noise-cancelling version of AirPodsPro, Apple quietly launched the official version of iOS 13.2 system. The new iOS system not only provides support for AirPods Pro, but also adds 59 new Emoji emojis. In the Siri options, the ability to delete Siri and dictation history has been added. At the same time, the iPadOS 13.2 system was also launched simultaneously.

For iPhone 11 users, starting with iOS 13.2, the DeepFusion function will be officially turned on. Deep Fusion is a new image processing system that relies on the A13 bionic neural network engine. Deep Fusion uses advanced machine learning techniques to process photos pixel by pixel to optimize texture, detail and noise reduction in various parts of the photo.

Not only that, iPhone 11 series users can also change the frame rate and resolution when recording video.

At the same time, the new system also fixes and improves the problems in the previous version of the address book, information, search, etc. For users of the iPhone 11 series, due to the addition of the exclusive Deep Fusion function, their camera capabilities have been improved again, and more ideal image effects will be obtained. It can be said that iOS 13.2 is worth updating.

As for battery life, Mingmei Infinite will have to test and use it for a period of time before telling you that, as far as the current usage is concerned, it will not be worse than any previous iOS 13 system. After countless tests and comparisons by Mingmei, in fact, the power consumption of iOS 12 and iOS 13 is almost the same, and it is not as exaggerated as some users say that the power consumption is like running water.

Other fixes are the official update log given by Apple, including fixing the inability to use auto-fill passwords in third-party apps, the keyboard may not be displayed when using “Search”, and the swipe gesture cannot be used to return to the home screen and other related issues. I don’t need to watch the series, so I won’t say much about this.

From now on, iPhone and iPad users can get system push upgrades through OTA.

However, the new system is also accompanied by various bugs. The worst thing is that the HomePod is unusable. According to foreign media reports, a number of Apple users have reported that Apple’s home audio system HomePod became bricked after upgrading to the iOS13 system.

Specifically, the HomePod stopped working, the top flashed a white or red light, and the problem could not be eliminated by restoring the factory settings.

Apple has yet to acknowledge the issue, nor has it provided any official solution. There is also news that Apple wants users to take the faulty HomePod to aftermarket replacement parts.

In addition, there are bugs. The official version of iOS 13.2, as the version with the highest version number, has undoubtedly fewer bugs than the previous version. However, there are still some small bugs, such as some APPs seriously kill the background, and a very small number of APPs still have flashbacks.

Surprisingly, in addition to the official release of Apple’s iOS 13.2, it solved the iPhone X home screen stuck and fixed a lot of problems. Apple also provides synchronous updates for 5S/6, including iPhone 5S, iPhone 6 and other devices, and pushes a new version of iOS firmware.

Of course, the update for these devices is the official version of iOS 12.4.3, and the version is 16G130 for repair only. This update is available for iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and sixth-generation iPod touch.

In addition, Apple’s emergency push notification shows that the official reminder must be updated to iOS 10.3 before November 3. 4 system, otherwise there may be serious problems that the entire phone cannot access the Internet, including not being able to roam in Safari, send and receive emails, sync iCloud, access the App Store, etc. In fact, iOS 10.3. 4 The intention of the update is to fix every 19. The positioning problem caused by the 4-year GPS time rollover (starting on April 6 this year), but the iPhone 5 is even more special, and it will even involve the normality of the entire machine’s Internet access.

On July 23 this year, Apple officially released the official version update of iOS 12.4, which brings the iPhone migration function, which can directly migrate data from the old iPhone to the new iPhone, while improving the security of the iPhone and iPad.

It is worth mentioning that Apple is developing new smart battery clips for the iPhone 11 and 11 Pro series. Photos of the iPhone 11 series smart battery clips have appeared in the latest iOS 13.2 system, which are divided into three parts. model. It is believed that Apple will soon start selling smart battery clips designed for the iPhone 11, iPhone 11 Pro and iPhone 11 Pro Max.

Update suggestion:

This version is a major version update of iOS13, and there are still many small problems. The improvement in fluency is relatively obvious, including the opening speed of the application and the overall animation smoothness, and the unlocking speed has also been improved. However, the problem of killing the background does exist. Although it is not as frequent as the feedback of individual netizens on the Internet, it is recommended for users who are more concerned about killing the background. Wait and see, and wait for the next minor version update.

In addition, iOS 13.2 fixes a number of bugs, which have played a great role in improving system stability. Because the first few official versions of iOS13 performed relatively poorly, for iOS13.2, Apple still recommends users to upgrade. If you have already upgraded to a certain version of iOS, and there are constant problems when using it, Mingmei Infinitely recommends updating. At present, there are fewer and fewer bugs, and the system stability is strengthened. It is still worth updating. As for users who are still in iOS12, you can and many more. What do you think of iOS 13.2? Welcome friends who have upgraded to share their experience.

Finally, what Mingmei wants to say is: Although at this stage for Apple, the sales of the new iPhone 11 series are the main event, but for our majority of fruit fans, the stability of the latest iOS 13 system is the most important thing. the most critical. Of course, many of our fruit fans also sincerely hope that Apple can put some energy into its core “moat” – the iOS ecosystem.

So, if you have anything else to say about the official version of iOS 13.2 that Apple just released today, please leave a message in the comment area and let Mingmei participate in the discussion together!

Text | Mingmei Infinity

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Marvell Launches Global Community Support Program to Reduce COVID-19 Impact

BEIJING (April 26, 2020) – Marvell (NASDAQ: MRVL) today announced a number of measures to support those impacted by the novel coronavirus (COVID-19) outbreak, including the establishment of a $1.5 million community relief fund , to support Marvell’s community projects around the world. As part of the fund, Marvell will provide employees with a special matching donation opportunity to encourage employees to do their part to help the local community.

In addition to the fund, Marvell has pledged to donate all of its employee restaurant grocery budget at its Santa Clara County, California, U.S. headquarters, totaling about $250,000 per month, to the Silicon Valley-based Second Harvest Food Bank. Marvell will also expedite payments to smaller suppliers, helping them ease cash flow disruptions.

Matt Murphy, CEO of Marvell, said, “We are going through a critical, global crisis that has taken an immeasurable amount of toll on our cherished communities. We all have a responsibility at a time like this. Show leadership and support those whose lives have been disproportionately impacted. Marvell’s focus is on helping the communities we call home.”

$1.5M Community Relief Fund: The impact of the COVID-19 outbreak touches everyone, but the hardest hit is low-income people, and temporary workers, who have been affected by event cancellations, workplace closures, school closures, consumers and companies Cuts to discretionary spending make it difficult to make ends meet. And more and more people are forced to stay at home to help themselves and care for their loved ones.

In Santa Clara County, home to Marvell’s largest office park in the world, the company took a portion of its relief fund and made the first donations to Destination through the Silicon Valley Strong Fund and the Silicon Valley Community Foundation: Home Project donated $250,000. As part of the Santa Clara County Homelessness Prevention System, Destination: Home is providing temporary financial assistance to low-income residents who have lost income due to the COVID-19 pandemic. The funds will be used to pay their rent and meet other basic needs to help the most vulnerable residents during this crisis.

In addition to Silicon Valley, Marvell is looking for similar foundations near other major offices in the U.S., Europe and Asia, and will allocate funds based on need and employee availability. Beneficiaries will receive assistance from food banks, homelessness prevention systems and financial support foundations for those affected by the outbreak. Grants from this fund match 100% of employee contributions to a specific foundation (up to a maximum of $2,500), giving employees the opportunity to support the most impacted populations in their respective communities.

Second Harvest Food Bank in Silicon Valley: In addition to the Community Relief Fund, as nearly 2,000 Marvell employees are now working from home, Marvell will donate monthly employee food to the Second Harvest Food Bank while the Santa Clara employee restaurant is closed $250,000 for groceries. The food bank is one of the largest relief agencies in the nation and works to ensure healthy meals for every member of the local community. Now, Second Harvest Food Bank has seen a five-fold increase in phone inquiries as members of the local community are temporarily laid off, lost hourly jobs, are forced to drain their savings, and face a feeding crisis. Today, to reduce exposure, its warehouses pre-package food, resulting in significantly increased operating costs. In addition, their volunteer ranks have also been affected as the elderly and people with pre-existing health conditions are required to stay at home.

Matt Murphy, CEO of Marvell, said, “As long as employees are working from home, the Santa Clara campus will maintain minimal basic operations. We hope that through strong means, funds can be used to support the local economy, especially now the most Those in need. In the meantime, we will continue to pay full wages to cafeteria staff and support staff, and donate grocery budgets to local almshouses to do our part in the community where we can.”

For more information, please visit:

About Marvell
Marvell pioneered the transfer of information faster than imagined, revolutionizing the digital storage industry. Today, breakthrough innovation remains at the heart of Marvell’s storage, processor, networking, security and connectivity solutions. With leading intellectual property and deep systems-level knowledge, Marvell infrastructure semiconductor solutions continue to transform the enterprise, cloud, automotive, industrial and consumer markets. For more information, please visit:

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Walking hard, Huawei invests in the core field of lithography machines!

Recently, Huawei’s Hubble Technology Investment Co., Ltd. has invested in Beijing Keyi Hongyuan Optoelectronics Technology Co., Ltd. The latter’s main business involves the core technology of lithography machines, which means that Huawei has begun to formally deploy the field of lithography machines.

According to the company’s industrial and commercial information, Huawei’s Hubble Technology Investment Co., Ltd. has recently invested in Beijing Keyi Hongyuan Optoelectronics Technology Co., Ltd. Although the name of Keyi Hongyuan is not familiar to people outside the industry, its main business involves the core technology of lithography machines, which means that Huawei has begun to formally deploy the field of lithography machines.

Specifically, the registered capital of Beijing Keyi Hongyuan Optoelectronics Technology Co., Ltd. increased from 120 million yuan to 201.6 million yuan, an increase of 68%. Among them, Hubble Investment held 4.7619% of the shares, becoming the seventh largest shareholder.

secret and great

In recent years, under the continuous pressure from the United States, the dilemma of “lack of cores and few souls” in China has intensified, and the huge impact on national enterprises represented by Huawei is obvious to all. Fortunately, in the field of operating systems, Huawei has released HarmonyOS for all-smart scenarios, and is committed to building a “universal system” for the interconnection of everything; in the field of chips, Huawei HiSilicon has a top domestic chip design team, but it is limited by domestic chips. The manufacturing industry is lagging behind, and Huawei’s mobile phone business has been severely hit.

In the past two years, Huawei has been “struggling”, but has never stopped saving itself, and officially established Hubble Technology Investment Co., Ltd. in 2019, mainly for investment services. As of the end of last year, Hubble Technology has invested in 25 companies including Shandong Tianyue, Dongwei semiconductor, Tianke Heda, Siruipu, Dongxin Semiconductor, and Smartway, covering EDA, semiconductor materials, third It is not difficult to see Huawei’s determination to get rid of “stuck neck” in various fields such as generation of semiconductors, semiconductor wafer-level substrates, analog chips, optoelectronic chips, and CMOS image sensors.

Foreign investment enterprises of Hubble Technology Investment Co., Ltd. (Data source: Qichacha)

In 2021, Hubble Technology has successively invested in Feipu Electronics, which is engaged in the development of Electronic design automation (EDA) software developed by itself, and Yundao Zhizao, which is committed to the independent research and development and application of high-end simulation technology. The technology manufacturing industry provides the overall solution of the rising software, and is engaged in the production and sales of Display driver chips/circuit boards.

It is worth mentioning that on May 31, Hubble Technology underwent an industrial and commercial change, and the company’s registered capital increased from 2.7 billion yuan to 3 billion yuan, an increase of about 11.11%. In addition, according to the company’s information, Hubble Technology has currently invested in 38 foreign companies, covering analog chips, silicon carbide materials, power chips, artificial intelligence chips, in-vehicle communication chips, connectors, etc. Keyi Hongyuan will undoubtedly further complement the chip ecological industry chain invested by Hubble.

The main business of Keyi Hongyuan is the light source system, one of the three core technologies in the lithography machine. It is the first domestic and world third 193nm ArF excimer laser company. Keyi Hongyuan was established in July 2016. It was jointly invested by the Academy of Optoelectronics of the Chinese Academy of Sciences, the Institute of Microelectronics of the Chinese Academy of Sciences, Beijing Yizhuang International Investment Co., Ltd., and State-owned Assets Management Co., Ltd. of the Chinese Academy of Sciences, with a registered capital of 120 million yuan.

In 2018, the first domestic high-energy excimer laser independently designed and developed by Keyi Hongyuan was shipped, breaking the long-term monopoly of foreign manufacturers and becoming the domestic industry leader in one fell swoop. However, wearing the aura of “the first in China and the third in the world”, the name of Keyi Hongyuan is not well known to the public. A large part of the reason is that its field is too professional. In addition, if it weren’t for the serious impact of this “chip supply cutoff”, most Chinese people would probably not have known the huge gap between domestic chip manufacturing processes and foreign technologies, and naturally they knew very little about lithography machines.

Benchmark for measuring technology R&D and industrial level

Previously, Huawei founder Ren Zhengfei mentioned that the difficulty Huawei encountered was the advanced chips they designed, and the domestic basic industry could not yet produce them. As we all know, advanced technology is one of the weakest links in domestic chips. Among the hundreds of processes in chip manufacturing, lithography is one of the most important steps to directly define the size of the transistor and determine the precision of the chip, and its cost accounts for the entire chip. 30% of the manufacturing cost, and some people even call it “a benchmark for measuring technology research and development and industrial level”.

However, the fabrication of the lithography machine required for the lithography step has stepped on our sore spot. In the global lithography machine market, the monopoly of ASML is beyond doubt, and companies such as Nikon and Canon have also divided up the remaining market share. According to the latest news, the exposure system of the EXE:5000 lithography machine with an ASML aperture value of 0.55 has been designed and can be officially shipped in 2022. The EXE:5000 lithography machine can be used for mass production of 2nm process chips, or even 1nm and below.

In contrast, domestic lithography machines are in a relatively backward position. At present, Shanghai Microelectronics can only manufacture 90nm low-end lithography machines, which is far from the EUV high-end lithography machines and DUV mid-end lithography machines manufactured by ASML. Faced with the current situation of domestic lithography machines, Professor Lin Yifu of Peking University believes that if the Dutch ASML company does not sell lithography machines to domestic enterprises, my country can fully master this technology in about three years. Once domestic enterprises master this technology, then The manufacturing cost of the lithography machine will be lower than that of foreign companies, and the Netherlands ASML will have to withdraw.

Many netizens think that Professor Justin Yifu Lin is too optimistic, but the author believes that his confidence is not groundless. Although EUV lithography machine is the most advanced technology at present, DUV, which is already the “older generation”, is actually the main force of wafer manufacturing, whether it is image sensor, power IC, MEMS, analog IC, or logic IC, behind the scenes Has its figure. The biggest difference between DUV and EUV is the light source, EUV’s light source wavelength is 13.5nm, and the most advanced DUV’s light source wave is 193nm, using ArF light source.

It is worth mentioning that my country has frequently received good news in the DUV field. In the past, Keyi Hongyuan broke the foreign monopoly of 193nm ArF lasers, and later NTU made a breakthrough in 193nm photoresist technology. Nanda Optoelectronics recently announced that the ArF photoresist independently developed by its holding subsidiary Ningbo Nanda Optoelectronics has been certified on the 50nm flash memory platform of a memory chip manufacturing company in December 2020. The certification breakthrough has been made in the products of the technology node, indicating that the company’s photoresist products already meet the process requirements for the metal wiring layer in the rear section of the 55nm platform.

Photoresist is mainly used to protect the built-in lines of the chip and reduce the erosion of the exposed outside of the line. The photoresist is smeared on the surface of the silicon-based chip and forms a liquid under the projection of extreme ultraviolet light. The effective projection area and the cleaning process directly determine the yield of the final chip. The uniformity of the photoresist also directly determines the final chip. Performance, the most widely used photoresists are Krf and Arf, which are mainly used in advanced chip manufacturing process.

More importantly, the ArF photoresist market has been monopolized by the United States and Japan for many years. In May of this year, the Japanese company “Shin-Etsu Chemical” announced that it would no longer sell KrF photoresist to Chinese semiconductor companies on the grounds of insufficient production capacity. Today, when domestic EUV lithography technology is still immature, ArF is still the mainstream, so our various breakthroughs in 193nm ArF lithography technology are of great significance.

write at the end

Initially, Huawei started from HiSilicon. After nearly ten years, its mobile phone chips have gradually gained consumer recognition and reached an international leading position. Before Huawei’s 5G technology became famous, my country was also unknown in the field of global communications.

In the face of monopoly and sanctions, Huawei and the domestic semiconductor industry are not only facing challenges, but also unprecedented opportunities. Although the domestic alternatives in the semiconductor industry have been hindered and long, my country’s scientific research technology, industrial manufacturing, talent reserve and other aspects have long since changed. Technology has made great progress, I believe that self-controllability is no longer empty talk!

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The infighting of the founders of Bitmain ended: Wu Jihan left, the company was split, and the valuation plummeted

Bitmain’s “infighting” drama that has lasted for more than a year has finally come to an end.

On January 26, 2021, Jihan Wu, the co-founder of Bitmain, announced his official resignation as CEO and chairman of Bitmain through an encrypted letter. Jihan Wu said:

As the co-founder of Bitmain, I have enjoyed the 2815 day journey and received selfless help and support from many clients, colleagues, friends and investors.


Wu Jihan also said that he would send his most sincere wishes to Ketuan Zhan and Bitmain led by him.

The gentleness of the wording and blessings in the letter is in sharp contrast with the infighting between Wu Jihan and Ketuan Zhan in the past infighting, which is shocking.


The “Power Seizing” Battle Between Wu Jihan and Zhan Ketuan

Ketuan Zhan never imagined that, as the major shareholder and chairman of Bitmain, Wu Jihan, the co-founder of Bitmain, would suddenly seize power.

October 27, 2019, was the day before the Shenzhen Security Expo was officially held. On this day, Bitmain held a conference of the third-generation smart server SA5 in Shenzhen. At that time, Ketuan Zhan appeared at the conference as the chairman of Bitmain.

On October 28, business information showed that Ketuan Zhan, chairman of Bitmain, stepped down as the legal representative of Bitmain, and was replaced by Wu Jihan, co-founder of Bitmain, and Ketuan Zhan no longer served as executive director. Ketuan Zhan was completely unaware of the major personnel changes registered in the industrial and commercial sector.

On October 29, Wu Jihan suddenly attacked.

On the same day, Wu Jihan, as the founder of Bitmain, chairman of the board of directors of Bitmain, legal representative & executive director of Beijing Bitmain Co., Ltd., issued an internal notice, announcing that Ketuan Zhan was relieved of all positions in Bitmain, effective immediately; The notice also requires Bitmain employees to no longer execute Ketuan Zhan’s orders and not participate in meetings convened by Ketuan Zhan.

A rift between the control of the two founders of Bitmain was made public.

You know, Jihan Wu and Ketuan Zhan are both key figures in Bitmain, and they are both founders of Bitmain. In terms of equity, Bitmain adopts an AB share structure. Each A-share common share has one vote, and each B-share common share has ten votes—except for the two co-founders of the company, Ketuan Zhan and Jihan Wu. Except for B shares, all company management and investors hold A shares.

According to the prospectus previously published by Bitmain, Ketuan Zhan and Jihan Wu hold about 3.989 billion B shares and 2.243 billion B shares respectively, and their shareholding accounts for 56.25% of the issued share capital before listing. Regardless of their shareholding ratio or voting rights, Zhan and Wu’s absolute control over Bitmain is unshakable.

But between Wu Jihan and Ketuan Zhan, Ketuan Zhan has a greater equity advantage and is the largest shareholder of Bitmain.

On November 7, 2019, after being “expelled” by Wu Jihan, Ketuan Zhan posted a long response on Weibo, saying:

It is embarrassing. As the founder and largest shareholder of Bitmain, I never knew that the legal representative registered with the government department would be suddenly changed without my knowledge. When the big change came, I realized that there have been countless scenes in film and television dramas, and the scenes of being stabbed in the back by my once most trusted partner and the “brother” who fought together will really happen.

Ketuan Zhan also said that all attempts to harm and take advantage of Bitmain will fail.


From being “expelled” to being deprived of a business license

After being “expelled”, Ketuan Zhan has never stopped paying attention to this company even though he is outside Bitmain.

At the end of 2019, Bitmain launched a personnel optimization plan; it is reported that the AI ​​business led by Ketuan Zhan has become the focus of optimization due to insufficient profitability; on January 4, 2020, Bitmain announced in an internal letter that the appointment of AI computing Wang Jun, the new CEO of the Feng business line.

In response, Ketuan Zhan issued an open letter on January 6 expressing his opposition to layoffs and calling for suicide.

Of course, at this time, if Ketuan Zhan only appealed on Weibo, he would not actually be able to control Bitmain’s operations – but he never gave up the fight for control of Bitmain.

In fact, after being “expelled”, Ketuan Zhan filed an administrative lawsuit with the Haidian Court because he was dissatisfied with the industrial and commercial registration change decision made by the Haidian District Market Supervision Administration, and then withdrew the lawsuit and changed it to administrative reconsideration – January 31, 2020, Haidian District, Beijing made an administrative reconsideration decision to revoke the registration of changing the legal person to Wu Jihan on October 28, 2019.

However, on January 2, 2020, Bitmain’s legal representative changed again, from Jihan Wu to General Manager Liu Luyao – Liu Luyao is Wu Jihan’s high school and undergraduate classmate.

Therefore, Ketuan Zhan once again filed an administrative reconsideration with the Haidian District Judicial Bureau on February 12, 2020, applying to revoke the change of legal representative and restore himself as the legal representative; on April 28, 2020, Beijing Haidian District again issued a reconsideration decision book, and revoke Liu Luyao’s legal representative status.

That is to say, in three or four months, the legal representative of Bitmain has changed twice: from Ketuan Zhan to Wu Jihan, and from Jihan Wu to Liu Luyao – but under the obstruction of Ketuan Zhan, this was changed. Both changes have been revoked by the administrative department.

It seems that Zhan Ketuan is the winner.

However, on May 8, 2020, at around 11:00 a.m., at the window 52 on the second floor of the Government Affairs Service Center in Haidian District, Beijing, the business license of Beijing Bitmain Technology Co., Ltd. was snatched from the hands of industrial and commercial administrative staff by a group of unidentified men. Let’s go, the legal person of this business license is Ketuan Zhan.

It is understood that there are more than 60 unidentified big men in the group, and Liu Luyao is the on-site commander.

At three o’clock in the afternoon, Bitmain issued another statement:

The public registration of the market supervision department shows that Ketuan Zhan is the legal representative of our country, which is a registration error, and seriously violates the provisions of the “Company Law”… Ketuan Zhan pretends to be the legal representative of “Beijing Bit”. …


Two founders reconcile, Bitmain is seeking IPO

The incident of “grabbing a business license” at the Haidian District Government Service Center in Beijing forced Wu Jihan’s party to face accountability from the public security department and the procuratorate. :

The police detained some of the leaders. Liu Luyao “cooperated with the investigation” and was released a few days later. Someone was detained for 37 days on suspicion of “picking quarrels and provoking trouble.”

But for Ketuan Zhan, the recapture of the company has to go on.

It is understood that in June 2020, Ketuan Zhan obtained the business license and returned to the company by picking the lock from the back door, but was still obstructed by Wu Jihan in the internal operation.

On July 17, 2020, Wu Jihan released the “Book to All Colleagues”, saying that the reason why Ketuan Zhan was relieved was that Ketuan Zhan had swelled after his success and could not listen to his opinions – he also said that the original intention of the company to change the management was only In order to survive the crisis, survive and develop, without any intention of revenge.

However, by the end of July 2020, according to the “Latepost” report, Ketuan Zhan and Jihan Wu were already negotiating; specifically, Ketuan Zhan tried to acquire the options in the hands of shareholders and employees at a valuation of US$4 billion.

In September 2020, Beijing Bitmain continued to undergo industrial and commercial changes. Its legal representative was changed from Ketuan Zhan to Jihan Wu. Wu Jihan was the executive director, Ketuan Zhan was the manager, and Yuesheng Ge was the supervisor. There was another industrial and commercial change in the mainland. Ketuan Zhan resigned from the manager position and added Wu Jihan as the general manager.

In December 2020, some media reported that Ketuan Zhan and Jihan Wu formally reached an agreement. As a result of the agreement, Ketuan Zhan pledged shares for the time being and lent $600 million from Bitmain to acquire Jihan Wu’s shares; rumors said that the coordinator was Shen Nanpeng of Sequoia Capital.

But now, along with this letter from Wu Jihan, the infighting among the founders of Bitmain has finally subsided.

Judging from the content of the letter, Ketuan Zhan did acquire some of Wu Jihan’s shares at a price of US$600 million. Part of the US$600 million came from Bitmain’s loan and partly from financing-accompanying this acquisition, Wu Jihan from Bitmain stepped down, but at the same time he also got some assets from Bitmain and merged it into BitDeer, and served as the chairman of BitDeer.

From the point of view of personnel appointments, from now until the listing of Bitmain, the board of directors of Bitmain will be composed of 5 people, Ketuan Zhan has the right to appoint 3 of them, and Jihan Wu has the right to appoint the other 2 – it can be seen that Wu Jihan takes Money is gone, but not completely out.

Of course, judging from the letter, Bitmain’s IPO plan is also in the process of being realized.



If there is no more chaos, the infighting between the two founders of Bitmain will come to an end.

However, since Wu Jihan attacked Ketuan Zhan at the end of October 2019, and now the two sides have reconciled, the development of Bitmain as a company has suffered serious internal friction, and its valuation has also suffered a serious decline in the process—— In August 2020, according to the latest data released by the Hurun Research Institute, Bitmain’s valuation dropped by 50 billion yuan to 30 billion.

Today, the valuation of Bitmain has stayed at the level of 30 billion.

With Wu Jihan’s letter of reconciliation, Bitmain in the past was essentially divided into two parts, Bitmain and Bit Deer, which belonged to the two founders of Bitmain.

In this way, Ketuan Zhan and Jihan Wu, who used to work together to start a business together, are now moving towards a break that is closer to the essence in some form of reconciliation.

The Links:   2MBI150NE-120 LMG7420PLFC-X SKM200GAL126D

Sony NUCLeUS can create intelligent medical image management system for hospitals

In January 2020, Sony launched a new generation of medical image management system NUCLeUS for the Chinese market. The system will provide hospitals with a more user-friendly and simplified digital imaging workflow. It can also be provided anywhere and anytime throughout the hospital as needed. All kinds of information including video and audio.

The intelligent era of medical applications is coming. It is reported that NUCLeUS has a series of new advantages – it can improve the quality of all imaging applications and services in interventional treatment rooms, operating rooms and examination rooms, while enabling users to use real-time transmission capabilities to help clinicians and management teams make more accurate diagnoses .

By improving the efficiency, safety, and quality of operations, and providing tools for better clinical decision-making, NUCLeUS aims to become the “operating system” of medical imaging in hospitals. With secure, high-speed connectivity delivering powerful internal or external computing power, coupled with a signal processing toolbox and new AI technologies, NUCLeUS brings hospital operating room integration and real-time data processing capabilities to new levels of healthcare workflow efficiency.


“Sony has always been committed to developing leading solutions to help medical professionals provide better and more effective services to patients. The newly launched NUCLeUS is a big step forward in this regard.” Director, Healthcare Industry Headquarters, Sony China Professional Systems Group Kenichi Mauri explained, “Today, with the significant increase in connected devices in hospitals, it is now more necessary than ever to have a central imaging ‘operating system’ to collect, store and route medical imaging data, not only for Operating theatres, examination rooms and interventional rooms are spread throughout the hospital network. With NUCLeUS, medical professionals have instant access to the patient information they need, without delay.”

NUCLeUS demonstrates Sony’s continued commitment to investing in the healthcare industry to provide a flexible, forward-looking software environment. It introduces a suite of NUCLeUS smart applications that efficiently utilize the existing hospital network infrastructure, ensuring a quick return on investment.

The next-generation NUCLeUS system offers the following benefits: Workflow-oriented performance built for clinicians; multi-format, multi-standard, and resolution up to 4K; high-quality AV with advanced video switching and routing Transmission and recording capabilities have been further enhanced; image transmission and viewing options have been improved for a smoother imaging workflow throughout the surgical phase, from planning to post-operative patient review.

New educational and lecture broadcasting capabilities to enhance workflows (e.g. 4K upscaling, rotation correction) through the NUCLeUS smart app with real-time communication tools such as Smart Annotation.

IT-Oriented Features: Multi-dimensionally scalable solution that can easily be extended to other rooms or hospital buildings at any time; provides IT administrators with secure and encrypted remote and preventive solution maintenance, including self-monitoring capabilities. Integration-oriented features: Vendor-compatible software-driven platform; better support for third-party applications through commercial APIs and various mechanisms and tools; secure HIS integration, full HL7/DICOM compatibility.

Currently, institutions that have used the NUCLeUS system include: University Hospital Leuven, Belgium (UU Leuven), one of Belgium’s leading teaching hospitals with nearly 2,000 beds and more than 9,000 employees who use NUCLeUS every year in its 34 digital surgeries thousands of surgical procedures performed in the hospital; Karolinska University Hospital in Sweden chose NUCLeUS as their standard IP video platform. The hospital will install 31 NUCLeUS systems to manage video workflows in the operating room, external connections to auditoriums and lecture rooms, and teleconsultation via TV presentations.

The NUCLeUS system launched this time is the result of Sony’s acquisition of the Belgian company eSATURNUS in 2016. The company is deeply involved in the medical field and can provide leading IP video clinical solutions. This expertise, combined with Sony’s imaging and AV/IT technologies, has resulted in continued investment and development in NUCLeUS.

The Links:   BQ24261MRGER EP2S90F1020I4N

The correct way to measure signal waveform when common mode voltage is present

Measure the signal waveform of the common-mode voltage to the ground. If the measuring instrument or measuring method is not correct, it will affect the measurement result in the slightest, and endanger the safety of life and property. This article uses two typical examples to illustrate the impact of improper measurement methods on the results and possible safety issues, and propose correct measurement methods.

Abstract: Measure the signal waveform of a common-mode voltage to the ground. If the measuring instrument or measuring method is incorrect, the measurement result will be affected at the slightest, and the safety of life and property will be endangered. This article uses two typical examples to illustrate the impact of improper measurement methods on the results and possible safety issues, and propose correct measurement methods.

1. Example 1

The customer’s product is a piezoelectric ceramic and its driving Circuit. Figure 1 is the product principle and test connection diagram. The switch tube is turned on and off at a frequency of about 100kHz. The tapped Inductor realizes the boost function to drive the piezoelectric ceramic chip. The sexual load forms a resonance to make the switch tube in a soft switching state.

Figure 1 Principle and measurement connection of piezoelectric ceramic driver

Customers use our oscilloscope and single-ended passive probe to observe the voltage waveform at both ends of the load RL. The positive end (tip) and negative end (ground clamp) of the probe are respectively connected to Vo+ and Vo- of the circuit, and the circuit uses an isolated adjustable power supply. It was found that when the oscilloscope probe was connected, the working current of the circuit increased a lot, and the customer suspected that there was a problem with our oscilloscope. We built the same test system to measure the customer’s products, and found that the current displayed by the adjustable power supply after the probe was connected increased from about 100mA to more than 6 times the original value. I changed a foreign brand oscilloscope to a comparative test and found that the same problem exists.

The reason is, as shown in Figure 1, the adjustable power supply actually has capacitance to the protective grounding wire PE, which is called Ciso below, and the negative end of the oscilloscope probe is connected to PE. At high frequencies, the negative end of the probe → PE → Ciso →GND forms a low impedance path. Both Vo+ and Vo- of the circuit have a voltage of 100kHz to GND. No matter the negative terminal of the probe is connected to Vo+ or Vo-, additional current will be generated through the negative terminal of the probe → PE → Ciso → GND, generating heat on the resistance of the Inductor and the loop resistance , The power supply current is increased, and the parallel low-impedance channel changes the resonance state of the driver. So it’s not the oscilloscope’s problem, but the incorrect measurement method.

Generally, people may have some misunderstandings about the isolated power supply. They think it is “completely isolated”, and often only see the isolated resistance and ignore the reactance. In fact, the isolated power supply supplied by the mains has parasitic capacitance to the ground. The source is the parasitic capacitance between the primary and secondary windings of the transformer, and the space capacitance of the secondary circuit to the chassis. Especially in order to meet the EMC standards, it is sometimes connected between the secondary and PE. Y capacitor of a certain capacity. The so-called “isolation” of isolated power supply means to provide the insulation requirements required for safe operation, and to ensure that there is a sufficiently high isolation impedance under DC and power frequency. However, the parasitic capacitance and the deliberately added capacitive reactance are reduced at high frequencies, and the isolation is reduced.

The measured output capacitance of a certain brand of adjustable power supply used in the above test to PE is 73nF, and the ground impedance of the isolated power supply is about 21.8Ω under a 100kHz sine wave.

You might think of cutting off the ground wire of the oscilloscope’s power supply to make the oscilloscope float. The test results show that the amplitude of the current increase is reduced, but the error still exists. Because in the oscilloscope, the case and the L and N lines are connected with Y Capacitors to suppress EMI. Externally, some electrical appliances on the power supply line also have indirect Y capacitors between L and N to PE, and the N line is connected to the ground at the transformer. Therefore, the impedance of L and N to PE is not particularly large. After cutting off the power supply ground wire of the oscilloscope, the common mode current path is: probe negative terminal → oscilloscope EMC filter (Y capacitor, common mode inductance) → L and N lines → on the power supply line L, N to PE impedance→Ciso→GND. On the other hand, from the perspective of safe use of equipment, it is not advisable to cut off the power supply ground wire of the oscilloscope, as shown in Example 2.

2. Example 2

It is not possible to directly use a combination of a single-ended passive probe and a general-purpose oscilloscope to measure the line connected to the power grid. A common example is to measure the waveform of the primary related circuit of a switching power supply connected to the mains.

Figure 2 Schematic diagram of switching power supply rectification and filtering principle

Figure 2 is a typical rectifier filter circuit at the input of a switching power supply. In the half cycle when L is positive to N, D1 and D4 are turned on, and the primary ground potential is close to the voltage of the N line to the ground, and in the half cycle when L is negative to N, D3 and D2 are turned on, and D2 is equivalent to connecting the primary ground to the L line. Therefore, if the ground clip of the oscilloscope probe is connected to the primary ground, and the L wire is short-circuited to the ground during the half-cycle when L is negative to N, the power grid has a large enough capacity, which will cause serious accidents such as line and equipment burnout. For this reason, some people disconnect the oscilloscope’s power supply ground wire for measurement to avoid short Circuits, but this method is wrong and absolutely undesirable. The general-purpose oscilloscope is designed according to the grounding situation. When connected to a device that has a higher common-mode voltage to the ground, the exposed metal parts of the oscilloscope will be charged! It will endanger the safety of life and property, and it is also explained in the safety-related chapters of the instrument manual. The user should read the manual of the equipment and use it in the correct way.

Three, the correct measurement method

The characteristics of the measured signals in Examples 1 and 2 are that there is a common-mode voltage to the ground, and the source impedance of the common-mode voltage to the ground is low at the observed frequency. But the single-ended probe and the general-purpose oscilloscope are connected to the ground, so if they are directly connected to the measurement, the results will be affected at least, as in Example 1, or accidents, as in Example 2. The correct measurement method should be as follows:

(1) Similar to the case of Example 1, there is no potential difference between the reference ground of the circuit and the earth. To measure the voltage between two points in the circuit that is not reference ground, you can use the ZDS4000 series oscilloscope to connect two single-ended passive probes, and the negative terminal is connected to the reference ground. The positive terminal is connected to the two points to be measured, and the voltage between the two points to be measured can be obtained by using the subtraction function of Math. This method can be used for CAT O occasions, but it is not suitable for measuring lines connected to the power grid.

(2) Similar to the case of Example 1, using the ZDL6000 oscilloscope with an isolated high-speed voltage acquisition card, the capacitance of each channel to the ground is less than 80pF. In the case where the capacitance has negligible impact on the system under test, the single-ended The source probe is connected to the two points to be measured. Figure 3 uses this method to measure the waveform of RL in Example 1.

Figure 3 Waveforms at both ends of RL measured by ZDL6000

(3) Similar to the case of Example 2, the ZP1500D high-voltage differential probe and ZDS4000 series oscilloscope can be used for measurement. ZP1500D can be used in 1000V CAT II or 600V CAT III occasions.

(4) Similar to the case of Example 2, the ZDL6000 oscilloscope recorder can be used with multiple isolated high-speed voltage acquisition cards, and the matching safety probe can be used in 1000V CAT II occasions, especially for applications that need to measure multiple signals of different ground potentials at the same time . For example, in the switching power supply, the voltage between the incoming line LN, the primary filter capacitor, the transformer primary, the secondary, and the secondary filter capacitor can be measured at the same time.

The Links:   LQ104V1DG83 LTM150XH-L04

The domestic 12-inch silicon wafer is unique, and the counter-cyclical expansion will only wait for the downstream to pick up

For a long time, China has not only lagged behind overseas giants in chip design and manufacturing, but also the underlying raw material, silicon wafer, is also a key link that is “stuck in the neck”. If domestic substitution can be achieved on this track, it will not only help reduce the cost of domestic chip manufacturing, but also strategically help build a complete chip industry chain.

Silicon Industry Group is a leading manufacturer of semiconductor wafers in China. Through the technical research and development and mass production of its subsidiaries, it has not only reached the international advanced level in 200mm silicon wafers, but also took the lead in realizing large-scale sales of 300mm silicon wafers in mainland China.

Silicon wafers are the raw materials of chips. For economic reasons, the larger the area of ​​a single silicon wafer, the more chips can be cut out. If Chinese manufacturers want to catch up on 7nm or even 5nm process chips, larger-area silicon wafers are essential raw materials. The domestic commercialization of 300mm silicon wafers in the silicon industry is of great significance to the domestic substitution of my country’s chip manufacturing industry.

However, the semiconductor industry is obviously cyclical. The silicon wafer industry has now entered a period of oversupply adjustment, with high customer inventories and declining demand. Both sales and sales of the silicon wafer industry declined in 2019. Through fundraising on the Science and Technology Innovation Board, can the silicon industry continue to increase capital investment in the counter-cyclical period to catch up with the next recovery in the industry?

Dislocation competition based on 200mm silicon wafer

Due to its late start, China’s pursuit of the semiconductor industry covers almost all aspects of the industry chain, and it is not a one-day effort: in the downstream links such as chip design, it has to face the patent network built by developed international manufacturers for many years; upstream In terms of materials, it is also necessary to fill the gap of backward manufacturing technology.

Going back to the most upstream of the chip manufacturing process, the semiconductor silicon wafer commonly known as “wafer” is the raw material for making chips, and it is also one of the links in China’s semiconductor industry chain with the largest gap between the international advanced level. Based on silicon wafers, various circuit component structures can be fabricated, so that silicon wafers can eventually become integrated circuit products with specific electrical functions.

From sand and stone raw materials to metallurgical grade silicon and Electronic grade silicon, the raw materials are continuously purified, and finally high-purity polysilicon is formed. High-purity polycrystalline silicon is also grown into single crystal silicon through processes such as melting. After that, single crystal silicon is formed into single crystal silicon rods under the Czochralski method and other processes, and then through the processes of cutting, rolling, slicing, chamfering, polishing, laser engraving and other processes to form silicon wafers.

According to the size of the silicon wafer, mainstream products can be divided into 150mm (6 inches), 200mm (8 inches), 300mm (12 inches) and so on. With the improvement of chip technology, the requirements for the size of silicon wafers are also higher and higher due to cost considerations. Under normal circumstances, 90nm and below process chips mainly use 300mm silicon wafers, while 90nm and above processes mainly use 200mm and below silicon wafers.

After decades of catching up, Chinese manufacturers are not only competent in the manufacture of 150mm silicon wafers, but also the leaders in the silicon industry and other industries have reached the international advanced level in the 200mm size, which has made great contributions to the domestic substitution of key semiconductor materials in my country. .

Founded in 2015, the silicon industry group has built a complete product line in sizes of 200mm and below, covering polished wafers, epitaxial wafers and SOI silicon wafers, through strategies such as equity investment and mergers and acquisitions.

From a process point of view, polished wafers need to meet the increasing demand for silicon wafer flatness of integrated circuits; epitaxial wafers are epitaxially grown on the basis of polished wafers to meet the production needs of specific devices; SOI (Silicon-On- Insulator) silicon wafer is to introduce a layer of oxide insulating buried layer on the top layer of silicon and the back substrate, so as to realize the dielectric isolation of components in the circuit and prevent leakage.

Through strategies such as technical cooperation, research and development and investment, the silicon industry and its subsidiaries have achieved leapfrog growth in business, and have also formed their own advantages in technology, standing out from a number of domestic manufacturers. In addition to the business of the subsidiary Xinao Technology, the silicon industry accounted for 2.18% of the global silicon wafer market sales, and the domestic market accounted for 26.32% in 2018.

The proportion of global semiconductor wafer industry sales in 2018

External mergers and acquisitions and cooperation are one of the secrets for silicon industry groups to master advanced technology and achieve rapid growth. In 2016, the silicon industry acquired Okmetic, which brought the Finnish wafer manufacturer into the bag, and also mastered its industry-leading crystal pulling technology.

Crystal pulling is one of the core processes in the production of monocrystalline silicon. The efficiency of crystal pulling and the stability of technical indicators of intermediate products will directly affect the yield and quality of silicon wafers. Thanks to the blessing of crystal pulling technology, Okmetic’s revenue growth rate has been maintained at more than 15%, and its net profit has also increased from 79 million yuan in 2007 to 128 million yuan in 2018, becoming the fastest growing silicon industry. engine.

In 2016, the silicon industry invested in Soitec and laid out SOI silicon wafers. The latter is not only the world’s seventh largest semiconductor wafer manufacturer, but also the world’s largest SOI wafer manufacturer. In the same year, the silicon industry invested in Xinao Technology, thereby entering the domestic SOI silicon wafer market, and now holds an 89.19% stake in the latter.

In terms of business operation, Xinao Technology has formed a synergy with Soitec and obtained the authorization of Smart CutTM technology. Smart CutTM is one of the most advanced thin-film SOI silicon wafer production processes in the world. Its patent is unique to Soitec and is only licensed to Shin-Etsu Chemical, Universal Wafer and Xinao Technology in the world.

By cooperating with Soitec, Xinao Technology has not only become the only enterprise in mainland China with Smart CutTM technology and the ability to produce world-leading SOI silicon wafers, but also has gradually close business cooperation with Soitec. According to the “License and Technology Transfer Agreement” signed by Xinao Technology and Soitec in 2014, the SOI chips produced by Xinao Technology using Smart CutTM technology can be sold to other domestic customers in addition to Soitec.

In the new agreement in 2018, SOI chips produced by Xinao Technology using Smart CutTM technology must be sold to Soitec first, and then sold by Soitec to third parties. At the same time, Xinao Technology also purchased substrates for SOI silicon wafer production from Soitec.

In terms of business model, the silicon industry makes full use of the procurement characteristics of small batches, multiple batches and various product types in the high-end market segment, and forms a dislocation competition with the industry leaders, thus gaining a firm foothold in the semiconductor silicon wafer market of 200mm and below.

Domestic breakthrough, entering 300mm large silicon wafer

In general, the diameter of a single crystal silicon rod is determined by the pulling speed and rotation speed of the seed grains. The slower the rotation speed in the crystal, the larger the diameter, but at the same time it will bring about defects in the lattice structure due to the unstable rotation speed. From a technical point of view, the larger the area of ​​the silicon wafer, the higher the technical difficulty.

From a market point of view, increasing the diameter of semiconductor silicon wafers is the need for chip manufacturers to pursue Moore’s Law. According to Moore’s Law, the number of transistors integrated on an integrated circuit doubles every 18 months. That is, the integrated circuit is doubled and the cost is reduced by half. For semiconductor wafers, the larger the diameter, the greater the number of chips that can be produced on a single wafer.

Take 300mm silicon wafer and 200mm silicon wafer as an example. Although the diameter of the former is only 1.5 times that of the latter, the actual area is 2.25 times that of the latter. Because the chips are mostly rectangular, the wasted edge of the larger wafer will be smaller. Therefore, under the same process conditions, the usable area of ​​300mm silicon wafer is more than twice that of 200mm, and the usable rate is about 2.5 times that of the latter. According to SEMI statistics, the global 300mm semiconductor silicon wafer shipment area accounted for 63.83% of the total semiconductor silicon wafer shipment area in 2018.

Therefore, as the focus of market demand shifts, the pace of Chinese manufacturers to catch up also extends to this point, and the silicon industry and its subsidiary Shanghai Xinsheng are no exception. Shanghai Xinsheng first pulled out the first 300mm monocrystalline silicon ingot in October 2016, and opened up the whole process of 300mm semiconductor silicon wafers the following year, and finally achieved large-scale sales in mainland China in 2018.

According to the conventional process, semiconductor silicon wafers need to be certified by chip manufacturers before mass supply, and the cycle is generally 9-18 months. Although Shanghai Xinsheng has not been on the track for a long time, it has now been certified by 49 customers including GlobalFoundries and SMIC.

In addition to promoting customer certification and expanding sales, the “national team” behind the silicon industry is also worthy of attention. The main partner of the silicon industry and its subsidiaries is the Microsystem Institute, which is the controlling shareholder of the Silicon Industry Shareholders Group, as well as the initiator and second largest shareholder of Xinao Technology.

In addition to the R&D cooperation between Xinao Technology and Microsystems on the SOI chip, Shanghai Xinsheng and Microsystems also jointly undertake the two major topics of “20-14nm technology node 300mm silicon wafer research and development” and “300mm single crystal rod growth technology research and development”. , to further improve its technical strength in R&D and manufacturing of 300mm silicon wafers.

The industry’s downward cycle expands against the trend

The semiconductor industry is obviously cyclical. When the economic situation improves, the entire industry chain actively expands production capacity. Then, in order to dilute the cost of expanding production capacity and increase production, product prices fall. After that, the market environment of oversupply made manufacturers unprofitable, and the entire industry waited for the increase in demand to digest production capacity, and then entered the next rising period. This is also the reason why the shipment area of ​​global semiconductor silicon wafers has been increasing year by year, while sales have fluctuated cycles.

Global semiconductor wafer market size

In 2019, the industry entered a downward cycle, with both shipments and sales declining. According to data released by SEMI, global silicon wafer shipments fell by 7% year-on-year in 2019, and sales fell from $11.38 billion to $11.15 billion.

The cooling of the market has also had an impact on the giants. In addition to the growth of Shin-Etsu Chemical and Global Wafer, the performance of SUMCO, Siltronic and Hejing Technology all declined significantly. SUMCO, which ranks second in the global silicon wafer market, and Siltronic, which ranks third, both pointed out in their business reports that the industry is expected to pick up in the second half of 2020 due to high customer inventories and it will take some time to digest inventories.

The silicon industry has also been affected, especially the shrinking downstream demand for 300mm silicon wafers, which has dragged down the performance. From January to September 2019, the net profit of the silicon industry turned from positive to negative, and the performance was under pressure. Among them, the capacity utilization rate of 300mm silicon wafers fell to 44.36%.

At present, the market share of the top five silicon wafer manufacturers has reached 92.57%, and the silicon industry still has disadvantages in the technical indicators of 300mm silicon wafer products. The silicon industry, which has already established a firm foothold in 200mm silicon wafers, still needs more competitive products in order to seize the growth opportunities brought about by new demands such as 5G.

In the downturn of the industry, there is no other way but to wait for the recovery of the entire industry chain. However, the fundraising of the Science and Technology Innovation Board has undoubtedly injected a boost into the way of the silicon industry to catch up. Under the circumstance that competitors are stagnant, it is a good opportunity for the silicon industry to improve its product technical indicators through research and development. Whether it can catch up with the next cycle of industry recovery depends on the present.

The Links:   SKKT92-12E NL6448BC33-71F



#FP50R12KE3 EUPEC FP50R12KE3 New FP50R12KE3 IGBT Modules 1200V 50A PIM., FP50R12KE3 pictures, FP50R12KE3 price, #FP50R12KE3 supplier




FP50R12KE3 Description

FP50R12KE3 IGBT Modules 1200V 50A PIM.

FP50R12KE3  2.20 lbs
FP50R12KE3 could be used in Inverter for motor drive, AC and DC servo drive amplifier, Uninterruptible Power Supply, Industrial machines, such as welding machines
IGBT Modules
FP50R12KE3 IGBT Modules 1200V 50A PIM.
Maximum ratings and characteristics
.Absolute maximum ratings (Tc=25°C unless without specified)
Kollektor-Emitter-Sperrspannung Collector-emitter voltage Tvj = 25°C VCES 1200 V
Kollektor-Dauergleichstrom Continuous DC collector current TC = 100°C, Tvj max = 175°C IC nom 50 A
Periodischer Kollektor-Spitzenstrom Repetitive peak collector current tP = 1 ms ICRM 100 A
Gesamt-Verlustleistung Total power dissipation TC = 25°C, Tvj max = 175°C Ptot 280 W
Gate-Emitter-Spitzenspannung Gate-emitter peak voltage VGES:±20V
Temperatur in Schaltbetrieb Temperature under switching conditions Tvj op-40~150°C
Mounting M5 screw torque 3.0~6.0 N·m
Gewicht Weight 300g

Texas Instruments ULN2004AINSR


#ULN2004AINSR Texas Instruments ULN2004AINSR New ULN2004AINSR High-voltage, High-Current Darlington Transistor Array 16-SO -40 to 105; ULN2004AINSR , ULN2004AINSR pictures, ULN2004AINSR price, #ULN2004AINSR supplier


Manufacturer Part Number: ULN2004AINSR
Brand Name: Texas Instruments
Rohs Code: Yes
Part Life Cycle Code: Active
Ihs Manufacturer: Texas INSTRUMENTS INC
Part Package Code: SOIC
Package Description: SMALL OUTLINE, R-PDSO-G16
Pin Count: 16
ECCN Code: EAR99
HTS Code: 8541.29.00.95
Manufacturer: Texas Instruments
Risk Rank: 1.14
Collector Current-Max (IC): 0.5 A
Collector-Emitter Voltage-Max: 50 V
Configuration: COMPLEX
JEDEC-95 Code: MS-012AC
JESD-30 Code: R-PDSO-G16
JESD-609 Code: e4
Moisture Sensitivity Level: 1
Number of Elements: 7
Number of Terminals: 16
Package Body Material: PLASTIC/EPOXY
Package Shape: RECTANGULAR
Package Style: SMALL OUTLINE
Peak Reflow Temperature (Cel): 260
Polarity/Channel Type: NPN
Qualification Status: Not Qualified
Surface Mount: YES
Terminal Finish: Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form: GULL WING
Terminal Position: DUAL
High-Voltage, High-Current Darlington Transistor Array 16-SO -40 to 105