(1) The order of Si Liwei and Dingxin immediately stopped the infringement of the invention patent right of Huiding No. ZL201410204545.4, including but not limited to the act of manufacturing, using and selling the alleged infringing product; (2) Micro, Dingxin immediately destroyed the infringing products; (3) ordered Siliwei, Dingxin to compensate for the loss of RMB 70 million, and the reasonable cost of Huiding to stop the infringement of 500,000 yuan; (4) Wei and Dingxin bear the legal costs of this case.
Huiding alleged that it obtained the patent for the invention entitled “Capacitive Fingerprint Sensing Circuit and Inductor” on December 19, 2017. It is proposed that Siliwei and Dingxin have not been approved by Huiding. To manufacture and sell a certain capacitive fingerprint chip, Huiding believes that the product falls within the scope of its patent protection and proposes the following lawsuit:
(1) The order of Sili Wei and Dingxin immediately stopped the infringement of the invention patent right of Huiding No. ZL201410105847.6, including but not limited to the act of manufacturing and selling the alleged infringing product; (2) Judging the order, Dingxin immediately destroyed the infringing products; (3) ordered Siliwei, Dingxin to compensate for the loss of RMB 70 million, and the reasonable cost of Huiding to stop the infringement of 500,000 yuan; (4) ordered Sili Wei, Dingxin bears the legal costs of this case.
Huiding alleged that it obtained the patent number of ZL201720925097.6, which is called the “secondary package of through-silicon via chip” on February 23, 2018. It is proposed that Si Liwei and Dingxin have not been remitted. Top license, manufacture and sale of a certain capacitive fingerprint chip. Huiding believes that the product falls within the scope of its patent protection and proposes the following litigation request:
(1) The order of Si Liwei and Dingxin immediately stopped the infringement of the invention patent right of Huiding No. ZL201720925097.6, including but not limited to the act of manufacturing or selling infringing products; (2) Judging Sili Wei, Dingxin Immediately destroy the infringing products; (3) Order Sili Wei, Dingxin to compensate for the loss of RMB 70 million, and the reasonable cost of Huiding to stop the infringement of 500,000 yuan; (4) Order Sili Wei, Dingxin To bear the legal costs of this case.
In addition, the author also contacted Dingxin, according to the author of the direction: "It doesn't matter to us!" (The above three patent details are attached at the end of the article)
Patent prosecution suppresses the other party as the norm: the battle for fingerprints under the screen is changed from dark to bright
In fact, it is really not surprising that the Huiding will sue Si Liwei, and even say that it is completely foreseeable! Some time ago, the author also talked about this issue during the communication with the industry. The industry person revealed to the author: "The good show is behind!"
People in the industry know that if anyone in the fingerprint market can finally compete with Huiding Technology, then from the current point of view, only after the acquisition of Zhaoyi Innovation, Si Liwei; on the other hand, if it is said that Si Liwei If Huiding Technology is only competing in the dark, then this patent event will bring both to the table.
It can even be said that the storm behind the patent prosecution incident lies in the OPPO incident. After OPPO banned the tidal fingerprint chip incident, it undoubtedly made Sili Wei's reputation in the market increase, at least in the mass consumer field. From this point of view, Sili Wei acted as a "fire hero" a role. Through the patents of the three indictments, we can also see that it is not the current hot under-screen fingerprint patent, but a capacitive fingerprint patent that is regarded by the industry as a “general technology”!
In fact, patent prosecution is very common in the mobile phone industry. It is more straightforward. The development of patents has also suppressed the development of competitors. It has become the norm in the industry. In the field of image sensors (CIS) in the past, as the giant of the industry. Wei Technology sued the tens of millions of dollars of SmartSens patent infringement invested by big funds and Lenovo Ventures, but unfortunately, Haowei Technology lost the case!
This phenomenon is also not uncommon in the fingerprint field. For example, a fingerprint chip manufacturer in mainland China has been dead for a long time without a result. For example, a Taiwanese touch and fingerprint chip manufacturer sued a mainland fingerprint chip manufacturer for many years, and it is still deadlocked from the second. For example, although the two sides have been deadlocked for many years, it is not a good thing for a mainland chip printer manufacturer to be sued, and many customers are afraid to adopt their fingerprint chips. More often, for the prosecution, the patent prosecution is not for the purpose of obtaining much compensation, but more for the indicted customer to lose!
Fingerprint chip manufacturers go to the current two roads: screen fingerprint + 3D camera
From the development of the fingerprint chip market, the current traditional capacitive fingerprint chip market price has been going on for a long time. Previously, people in the industry reported to the mobile phone online: "I thought that this year's mobile phone industry market is sluggish, there will be some fingerprint chip manufacturers. Forced to go out, but from the current point of view, everyone is insisting on persistence. Especially at the beginning of this year, FPC began to join the bargaining camp, which did bring some pressure on domestic fingerprint chip manufacturers."
In the long-term price war of capacitive fingerprint chips, the screen fingerprints of the rescue field have finally been mass-produced. According to the mobile phone report online, the fingerprint chip market in this year is only Sili and Huiding. The overall shipments of home companies are conservatively estimated at more than 20 million. In addition to the current large-scale adoption of the screen fingerprint OPPO, vivo and Meizu , in the second half of this year, there will be more mobile phone brands to join the screen fingerprint camp!
As for the fingerprint chip manufacturers, there are mainly two development trends. In addition to continuing to struggle in the traditional capacitive fingerprint market, the vertical direction is to enter the screen fingerprint market, such as Si Liwei, Huiding Technology, Synaptics and so on. In the horizontal direction, it further enters the field of 3D cameras.
According to the mobile phone report online, as early as the beginning of this year, Huiding Technology has announced that it has entered the field of 3D cameras. According to the mobile phone report, its related R&D team mainly comes from overseas; in the near future, another fingerprint chip manufacturer also announced Entering the field of 3D cameras, and will release products next month, that is, the technology that is closely related to Xinyi Technology!
It is understood that the company is headquartered in Shenzhen, China, focusing on the development of 3D face detection technology, providing customers with a complete 3D face detection software and hardware solution. In view of the depth detection field that traditional 2D face detection technology can't realize, 阜时科技 provides customers with complete solutions to improve the security and interactive experience of face detection with its excellent strength and many industry advantages.
The founder is the general manager of Xinyi Technology, Mo Lianghua, who has the academic background of Nanjing University and Hong Kong University of Science and Technology. He has nearly 20 years of research and development experience in the field of sensors. He entered the chip design field earlier in China and is still writing. A typical representative of the new record.
According to reports, starting from 2015, Mo Lianghua began to pay attention to the new human-computer sensing interaction technology. "Traditional touch and display technology can only communicate with users in one direction. Although it is convenient for human-computer interaction, it can also do more." Mo Lianghua believes that "good human-computer interaction technology must make hardware from More levels to understand user needs, not only to perceive, but also to recognize, to create more value for users." Based on the recognition of this concept, Mo Lianghua invested in the late special professors, young thousand experts The 3D printing company founded by Dr. Lu Changshi opened the door to exploring new areas.
At the same time, the development of 3D technology for face detection has also been put on the agenda since then. Prof. Chen Jian from the School of Software, South China University of Technology, and other industry veterans have been invited to become technical consultants. On the basis of continuous integration of technical teams, production, research and research platforms, in 2017, we officially registered and established 3D face detection technology.
Si Li micro-ultrasonic solution breakthrough: reaching mass production level early next year
In addition, with the advent of the full-screen era, due to the limited capacitive scheme, the technical application of the fingerprint under the screen has become a hot spot in the industry. The optical and ultrasound solutions have become the mainstream of development. From the current point of view, the fingerprints under the optical screen are mainly thought. Li Wei, Hui Ding Technology and Xin Si San, as well as pressure touch solutions, while the ultrasonic program is mainly Qualcomm, but this situation is about to be broken by the idea.
Among them, the ultrasonic scheme uses the echo intensity to identify the fingerprint, and has the advantages of oil-proof waterproofing and strong penetrability. The ultrasonic solution uses the ultrasonic wave of a specific frequency emitted by the fingerprint module to scan the finger, and is absorbed and penetrated when the ultrasonic wave reaches the surface of different materials. Different from the degree of reflection, it is possible to identify the position of the fingerprint and the position of the fingerprint by utilizing the difference in sound impedance between the skin and the air or different skin layers.
The advantage of the ultrasound solution is that it is more penetrating, capable of deep subcutaneous fingerprint recognition and can identify living organisms, so the safety of the solution is higher; in addition, the ultrasonic solution is not easily interfered by oil and water stains and strong light, so Unlocking is more stable and reliable, and has become an important direction for the development of fingerprint identification solutions.
Recently, Shanghai Sili Microelectronics has made painstaking research and development in MEMS ultrasonic technology for two years and made breakthrough progress. Its self-developed ultrasonic transducer has passed the series performance test, and the conversion efficiency is up to 1.5% at 10MHz frequency point, showing excellent performance, and has been applied to the development of the next generation ultrasonic fingerprint recognition chip.
It is reported that the piezoelectric ultrasonic transducer (PMUT) used by Si Liwei uses the piezoelectric effect of aluminum nitride to convert the electrical energy and mechanical energy to detect the ridge information of the finger skin and the dermis layer to make accurate Judgment.
According to reports, aluminum nitride is a very stable piezoelectric material with two important characteristics: the inverse piezoelectric effect and the piezoelectric effect. The inverse piezoelectric effect means that when a voltage is applied across the piezoelectric material, the piezoelectric material is deformed internally, and the shape variable is proportional to the voltage, which is a process of converting electrical energy into mechanical energy; the piezoelectric effect refers to the piezoelectric material. When deformation occurs under the action of force, the positive and negative charge centers of the piezoelectric material are relatively displaced, so that the opposite ends of the piezoelectric material produce oppositely bound charges. The amount of charge is proportional to the pressure, which is the process of converting mechanical energy into electrical energy. .
Different from other SOI multi-silicon wafer processes, Si Liwei's piezoelectric ultrasonic transducers are unique in the structure and process of single-wafer etching. They are mainly composed of suspended transmissive films, including bottom electrode, piezoelectric layer and top electrode. Elastic layer. By using the inverse piezoelectric effect of the piezoelectric material, as long as a fixed frequency voltage is applied to the bottom electrode and the top electrode on the upper and lower sides of the piezoelectric material film, the film vibrates to generate sound waves. Conversely, when the sound wave is transmitted to the transducing film, the film is deformed, and positive and negative opposite charges are generated at both ends of the piezoelectric layer, and the peripheral circuit can collect the generated electrical signal through the top electrode and the bottom electrode.
In the fingerprint identification application, an alternating voltage is applied to the ultrasonic transducer, the ultrasonic transducer generates vibration, and the vibration is transmitted upward, that is, the ultrasonic wave is transmitted upward, and passes through different dielectric layers (screen, glass, etc.) to reach the valley or ridge of the finger. The sound wave encounters the surface of the ridge, partially reflected, partially transmitted, and because the acoustic impedance of the air in the valley is much higher than the ridge, the sound wave is almost totally reflected when it encounters the valley. When different sonic energy reflected from the valleys and ridges is transmitted to the corresponding ultrasonic transducer surface, the corresponding ultrasonic transducer generates different electrical signals (amplitude, frequency, phase, etc.).
Compared with other fingerprint identification technology solutions, ultrasound technology can achieve 3D fingerprint recognition, and the security is higher. By acoustic focusing, the sound wave is focused on the surface of the finger. If the ridge of the finger is encountered, part of the sound wave is reflected back, and the rest of the sound wave is transmitted into the skin. This part of the sound wave is reflected back again after encountering the dermis layer; therefore, the sound wave encounters the ridge The two signals at different times are reflected back in the epidermis and dermis; in the valley, the sound waves are only reflected once and are totally reflected. The ultrasonic fingerprint identification scheme is to collect the fingerprint signals of the epidermis and the dermis by this method, thereby obtaining 3D fingerprint information.
It is understood that the successful PMUT transducer developed by Sili Micro uses AIN material, based on CMOS technology, unique MEMS structure, simple structure and easy process realization. Si Liwei has already developed the on-screen ultrasonic fingerprint recognition based on this PMUT transducer. According to industry sources, it is expected that mass production will be achieved in early 2019.
Attachment: Huiding three patent details
Patent 1: terminal based on fingerprint recognition and login method and system in standby state
Patent 2: Capacitive fingerprint sensing circuit and sensor
Patent 3: Secondary package of through-silicon via chip