On April 1, 2022, Dr. Zheng Junxiong, chairman of Shenzhen Zkosemi Semiconductor Technology Co.,Ltd. received an exclusive interview with Zhongchuang TV of Shenzhen radio and Television Group in (creating the future: focusing on the development of "new track" - photonic chip).

    In recent years, the state has paid more and more attention to the problem of chip "neck sticking". The integrated circuit industry is the core of the information industry and the key force leading a new round of scientific and technological revolution and industrial reform. At present, opportunities and challenges coexist in China's integrated circuit industry. The state has been vigorously investing in the development of domestic independent integrated circuit industry. Independent domestic chips have developed from "basically unavailable" 20 years ago to "basically available" today. However, they still lag behind the international leading level in terms of capital, management, talents, equipment, technology and product reliability. There is still a big gap between the effective supply of chips and market demand.

    The roadmap for the technological development of China's optoelectronic device industry (2018-2022) released by the Ministry of industry and information technology at the end of 2017 pointed out that at present, the localization rate of high-speed optical chips is only about 3%. It is required that the localization rate of medium and low-end optoelectronic chips should exceed 60% and the localization rate of high-end optoelectronic chips should exceed 20% in 2022.

Dr. Zheng Junxiong is currently the founder and chairman of Shenzhen Zkosemi Semiconductor Technology Co.,Ltd. He once joined the world's top 500 Huawei Technology Co., Ltd. and has more than 10 years of experience in technology, R & D and management team of Huawei Technology. He has led a research and development team of 100 people and led the team to win the highest award of Huawei - gold medal. He has the talents and channel resources of Huawei's optical chip, optical communication chip and optical sensor chip industry chain. It has organized a core expert team from the world's leading optical chip leading enterprises. At present, high-end optical chip products have been successfully developed and mass produced. The company has the core technology of optical communication VCSEL with single channel rate of more than 50Gbps, 3D optical sensing VCSEL with photoelectric conversion efficiency of more than 55% (multi junction), and optical chip wafer manufacturing process with high yield. As the founder, he won "the first place in the national finals of China Innovation and entrepreneurship competition and the top 50 in China", "the first gold award in the finals of Guangdong Zhongchuang Cup", "the second prize in Shenzhen of China deep innovation competition, the first prize in Longgang District", "the third prize in Shenzhen of specialization and innovation entrepreneurship competition", etc. Zheng Junxiong has more than 100 technical patents as the first inventor, most of which have been authorized. It has also won the support of relevant science and technology projects in Guangdong Province and Shenzhen City, entrepreneurship support and the title of national high-tech and Shenzhen high-level talent team.

Maker TV Channel:

    Shenzhen radio and Television Group's "maker TV" channel is the first TV channel in China to focus on the innovation ecosystem with the theme of innovation, entrepreneurship, venture capital and makers. As a window to publicize the innovation and entrepreneurship atmosphere in Longgang and Shenzhen, it mainly reflects the news and innovation development trends related to makers in Longgang and Shenzhen innovation and entrepreneurship, and spreads maker culture, At the same time, it introduces various novel and cool products and cutting-edge trends of makers at home and abroad.

    Due to the outstanding achievements of Shenzhen Zhongke optical core in innovative R & D and innovative application in the field of optical chips, the maker TV channel of Shenzhen radio and Television Group conducted an exclusive interview with Dr. Zheng Junxiong on optical chip design and wafer manufacturing projects, and conducted in-depth interviews with the development of optical chip design, optical chip packaging test laboratory and optical chip packaging test production line of Shenzhen Zkosemi Semiconductor Technology Co.,Ltd.

Shenzhen Zkosemi Semiconductor:

    Shenzhen Zkosemi Semiconductor Technology Co.,Ltd. established in October 2020, is a leading optoelectronic semiconductor high-tech enterprise, providing the next generation of high-performance semiconductor laser VCSEL / DFB / EML optical chip solutions for 5g / 6G optical communication, intelligent automobile, consumer electronics, intelligent Internet of things and other enterprises. Shenzhen Zkosemi Semiconductor is committed to building a complete solution of high-end optical chips based on China and even the world. Finally, we will become the leader of high-end optical chips in the world and change human life!

    Shenzhen Zkosemi Semiconductor products mainly include: 10Gbps /14Gbps /25Gbps NRZ/50Gbps PAM4 and other high speed data transmission VCSEL optical chips used in the field of optical communications such as 850nm and other high speed data transmission (also can be applied to HDMI/USB, etc.). It is applied to 905nm and other high-power lidar VCSEL optical chips such as intelligent vehicle assisted driving / self driving system, etc., which is applied to consumer electronics. High performance 3D sensing VCSEL optical chip of 940nm and other wavelengths of intelligent Internet of things. Products that can be developed by downstream customers corresponding to optical chip products include 400g optical module, 800g optical module or even higher rate optical module, 3D sensing face recognition module, lidar module, etc. Future optical chips also include silicon optical chips, DFB optical chips, EML optical chips, silicon-based monolithic integrated optical chips, etc. In the future, we can provide diversified mass production development schemes and customized services according to customer needs. At the same time, based on the strategy of global competition and customer service, the company will continue to increase R & D centers and production bases on the basis of the existing global layout, so as to better serve global customers.

Advantages of Shenzhen Zhongke optical core:

1. The optical chips of Zhongke optical core and VCSEL designed independently, including optical chips for optical communication applications and optical chips for optical sensing applications, have been successfully developed and mass produced. The performance indexes and parameters of the products have been certified by authoritative third-party institutions, including United Microelectronics Center cumec and Institute of semiconductors, Chinese Academy of Sciences; The performance indexes and parameters of the products belong to the domestic leading level and reach the international equivalent level.

2. Technical advantages: VCSEL is completely independently designed, and its performance indexes, parameters and stability indexes at room temperature and high temperature are leading in China and reaching the international level. The 850nm single channel 50Gbps VCSEL optical chip has been successfully developed and mass produced, filling the domestic gap.

(1) Under normal temperature and high temperature, 850nm single channel 25gbps VCSEL optical chip, eye margin > 50% (industry standard > 15%)

(2) At room temperature and high temperature, 850nm single channel 50Gbps VCSEL optical chip, eye tdecq is about 1.5dB (industry standard is < 3dB)

(3) The VCSEL optical chip of Zhongke optical core can work normally when the driving current is 4mA. At present, the driving current in the industry is basically 6mA or above.

(4) 850nm single channel 25gbps VCSEL optical chip of Zhongke optical core, with bandwidth > 18GHz; The bandwidth reaches 19ghz.

Exclusive interview with maker TV:

    "At present, light and electricity are on two 'tracks' with their own application scenarios. In the field of logic computing, the future trend is photoelectric integration, and it will take a long time to realize all-optical computing." Dr. Zheng Junxiong said that although photonic integrated circuits are still in the primary stage of development, it is inevitable that they will become the mainstream development trend of optical devices.

    "Generally speaking, at present, photonic chips can replace electronic chips only in the field of individual computing and transmission." Dr. Zheng Junxiong said that in terms of manufacturing process, although the two are similar in process and complexity, the structural requirements of photonic chip are not as strict as electronic chip, which is generally 100 nm, "which greatly reduces the dependence on advanced technology and alleviates the bottleneck of current chip development to a certain extent".

    "Light has the advantage of light, and electricity has the advantage of electricity." Dr. Zheng Junxiong said that in some application scenarios, there is competition between the two, but more often, the two are win-win relations.

    "At present, silicon optical chip technology is not as mature as electronic chip, so there are many unknown factors, and the two should be well connected in the future." Dr. Zheng Junxiong believes that there is a complementary relationship between electronic integrated circuits and photonic integrated circuits. "In the future, we can make full use of the advantages of high-speed transmission of photonic integrated circuits and multifunctional and intelligent electronic integrated circuits to achieve better results in the new 'track'." Dr. Zheng Junxiong said.