There is still a gap between the rapid technological upgrading of LED industry and that of foreign countries

by:ALLTOP      2019-12-26
Starting from 2000, light emitting diodes (Light- EmittingDiode, referred to as LED) The average luminous efficiency is 10 ~ per year ~ The speed of 20lm/W is greatly improved. In recent years, the development of semiconductor lighting technology has gone by leaps and bounds, and the speed of technological innovation has far exceeded expectations. The Giants accelerated the attack and the industrial technology improved rapidly. On May 2011, Cree announced that its white LED light efficiency laboratory data was as high as 231lm/W, setting a new record. In 2011, the high luminous efficiency of Kerui's mass-produced products reached 161lm/W. In addition, in the field of epitaxial wafer production technology, Philips Company of the Netherlands took the lead in mass production of 150mm epitaxial wafers at the end of 2010; In the field of LED lighting applications, General Electric Company of the United States has taken the lead in making major breakthroughs in heat dissipation technology, which is of milestone significance to industrial development. In terms of patents, the LED product market and patents, especially the core patented technologies, are basically accepted by the five major companies ( Osram, Kerui, Nikko chemical, Toyota synthesis and Philips)Control. However, the major LED Giants have reached a patent licensing agreement with each other to form a patent licensing network, thus consolidating their monopoly position. At present, many domestic LED enterprises have mastered the technology of low-power chips, and the research and development level of high-power chips has reached 110lm/w, but there are a few enterprises that can produce in large quantities. At present, domestic chips have made breakthroughs in lighting applications through small chip integration, but the market share of valuable high-power lighting chips is still relatively low, with more than 80 relying on imports; MOCVD equipment is still largely imported. At present, core technologies, patents and standards are still the main constraints for the development of China's semiconductor lighting industry. LED enterprises in Shanghai pay attention to research and development and have certain advantages in China. The main manifestations are as follows: first, the substrate: Sapphire and SiC substrates have established a pilot production line for cutting, grinding and polishing 2 inch substrates, and other substrates have been patented, such as lithium aluminate substrate. The second is the research and development of high-brightness chip technology: Shanghai Blu-ray and Shanghai Lanbao's 863 project acceptance indicators are among the top three in China, and 863 Phase I and Phase II projects have invested heavily in Shanghai. Third, equipment: as an important base of China's advanced manufacturing industry, Shanghai has a number of international professional service companies for semiconductor manufacturing equipment such as pipelines, gas routes and controls, provide strong support for the research and development of MOCVD equipment. Fourth, the research and development of LED lighting supporting technology: Shanghai has a large number of research and development advantages in optical path design, precision optical devices and special applications. However, compared with the advanced level of foreign countries, the gap in Shanghai is still relatively large, and the quality of patents applied by local enterprises needs to be improved; Most of the high-quality and high-power LED chips used by local lighting manufacturers are still imported, and the equipment developed and produced by most enterprises has not yet been applied in Shanghai.
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