Differences between Chinese LED companies and foreign LED packaging technologies

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. Various types of applications based on the use of a large number of LED devices of the LED device, such as a large LED display, LED backlight of the liquid crystal display, LED lighting, LED traffic lights and automotive lamp, LED devices 40 accounted for in the total cost Applications From % 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.

Device depends on the performance of the LED package in the LED chips on the extent of 50%, the LED chip core indicators include brightness, wavelength, efficiency failure, anti static electricity force attenuation. At present, most of the small and medium-sized chips of domestic LED packaging enterprises use domestic brands. The chip performance of these domestic brands is small compared with foreign brands, and it has good cost performance and can meet the needs of most LED application companies. In particular, the performance of some chip brands has been comparable to that of foreign brands. Through the cooperation of packaging technology, it has been able to meet the needs of many high-end applications.