I. Overview The LED industry chain is generally divided into upper, middle and lower reaches, which are LED epitaxial chips , LED packages and LED applications. As the LED package in the LED industry chain, it plays an indispensable role in the entire industry chain. LED devices are widely used in various applications based on LED devices, such as large LED displays , LED backlights for LCDs, LED lighting, LED traffic lights, and automotive lights. LED devices account for 40% of total product cost. Up to 70%, and the performance of LED applications is often more than 70% determined by the performance of LED devices. China is a big LED packaging country. It is estimated that 80% of the world's LED device packaging is concentrated in China, and it is distributed in various US-funded, Taiwan-funded, Hong Kong-funded and domestic-funded packaging enterprises. In the past five years, foreign LED packaging companies have continued to move to the mainland, domestic packaging companies continue to grow and develop, and technology continues to mature and innovate. In the field of low-end LED device packaging, China's LED packaging companies have a high market share. In the field of high-end LED device packaging, some Chinese companies have made major breakthroughs. With the continuous maturity of process technology and the accumulation of brand reputation, China's LED packaging companies will play an important and leading role in China's LED application country. The following sections illustrate these differences from the various aspects of the LED packaging industry chain. Second, package production and test equipment differences LED main packaging production equipment includes solid crystal machine, wire bonding machine, sealing machine, spectrophotometer, dispensing machine, smart oven and so on. Five years ago, LED automatic packaging equipment was basically the world of foreign brands, mainly from Europe and Taiwan. China only has a small supply of semi-automatic solid crystal and wire bonding equipment. In the past five years, China's LED production equipment manufacturing industry has made great progress. Nowadays, automatic solid crystal machine, automatic sealing machine, spectrophotometric separation machine, automatic dispensing machine, intelligent oven, etc. are all supplied by manufacturers. Good value for money. LED main test equipment includes IS standard instrument, photoelectric integrated tester, TG point tester, integrating ball lumen tester, phosphor tester, etc. and reliability test equipment such as thermal shock, high temperature and high humidity. Except for the standard instruments mainly from Germany and the United States, other equipments are currently produced and supplied by domestic manufacturers. At present, among the LED packaging enterprises in China, LED packaging companies in the forefront have the world's most advanced packaging equipment, which is determined by the advantages of latecomers. As far as the hardware level is concerned, China's above-scale LED packaging companies are the most advanced in the world. Of course, some of the higher level test and analysis equipment has yet to be further equipped. Therefore, China has a world-leading level in packaging equipment hardware, with the basis of advanced packaging technology and process development. Third, LED chip differences At present, there are about 10 LED chip companies in mainland China, which started late and are not big enough. The largest LED chip companies have an annual output value of about 300 million yuan, and the average annual output value of each family is 1 to 2 billion. In the past two years, LED chip companies in mainland China have developed rapidly and their technology level has improved rapidly. Small and medium-sized chips (referred to below 15 mils) have been able to meet the needs of domestic packaging companies. Large-size chips (referred to as power-type W-class chips) Imports are also required, mainly from US and Taiwanese companies, but large-size chips can only be used in large quantities after the LEDs enter general illumination. The performance of LED package devices depends on the LED chip by 50%. The core indicators of LED chips include brightness, wavelength, failure rate, antistatic ability, attenuation and so on.
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