The difference between Chinese enterprises and foreign LED packaging technology

, overview

LED industry chain is divided into the upper, middle and lower reaches, are LED epitaxial chip, LED packaging and LED applications. As the link between LED and LED in the industrial chain, it plays an important role in the whole industry chain. Various applications of LED devices with large LED based devices, such as large LED screen liquid crystal display, LED backlight, LED lighting, LED lights and car lights, LED devices accounted for 40% to 70% of total cost in the application of the product, the performance and application of LED products to more than 70% by the performance of LED the decision device.

China is LED package power, according to estimates of LED package number 80% of the world's focus on China, distribution in various American, Taiwan, Hong Kong, domestic packaging companies.

In the past five years, foreign LED packaging enterprises continue to move to the mainland, domestic packaging enterprises continue to grow and develop, technology continues to mature and innovation. In the low-end LED device packaging field, the market share of China's LED packaging companies is higher, in the high-end LED device packaging field, some Chinese companies have a greater breakthrough. With the continuous maturity of technology and the accumulation of brand reputation, China LED packaging enterprises will play an important and leading role in China's LED application.

The following sections from the LED packaging industry chain to explain these differences.

Two, packaging production and test equipment differences

LED main packaging production equipment, including solid crystal machine, wire bonding machine, sealing machine, sub color separation machine, dispensing machine, intelligent oven, etc.. Five years ago, LED automatic packaging equipment is basically the world of foreign brands, mainly from Europe and Taiwan, China has only a small amount of semi automatic solid crystal, welding equipment supply. In the past five years, LED China production equipment manufacturing industry has developed rapidly, and now the automatic solid crystal machine, sealing machine, automatic sorting machine, automatic dispensing machine, intelligent oven has the manufacturers supply, with a good price.

The main test equipment of LED includes IS standard tester, photoelectric integrated tester, TG point tester, integrating sphere lumen tester, fluorescent powder tester, etc.. In addition to the standard instrument mainly from Germany and the United States, other equipment currently has domestic manufacturers supply.

At present, LED packaging enterprises in China, in the forefront of the LED packaging enterprises have the world's most advanced packaging equipment, which is decided by the advantage of backwardness. On the hardware level, China's LED packaging enterprises above the scale of the world's most advanced. Of course, some of the higher level of test analysis equipment has yet to be further equipped.

Therefore, China has the world's leading level in the packaging equipment hardware, with advanced packaging technology and technology development foundation.

Three, LED chip difference

At present, China's LED chip companies about ten or so, started late, the scale is not big enough, the largest LED chip enterprise annual output value of about 3 hundred million yuan, the average annual output value of each in the range of 1 to 2 hundred million.

This year, the China LED chip enterprise fast development, enhance the level of technology is also very fast, small and medium size chip (15mil below) has been able to basically meet the domestic packaging needs of enterprises, large size chip (of power type W chip) has to be imported, mainly from the United States and Taiwan enterprises, but large size chip only in order to LED into the general lighting after the mass application.

The performance of LED packaging device depends on the LED chip in 50% degree. The core of LED chip includes brightness, wavelength, loss of efficiency, antistatic ability, attenuation and so on. At present, the domestic small and medium size chip LED package most of the enterprise with domestic brands and foreign brands, smaller chip performance gap between these domestic brands, good price, also can meet the demand of the enterprise most LED applications. In particular, part of the performance of the chip brand has been quite comparable with foreign brands, through the packaging process technology, has been able to meet the needs of many high-end applications.

Four, packaging auxiliary material differences

Packaging auxiliary materials including brackets, gold wire, epoxy resin, silica gel, mold, etc.. The auxiliary material is an important basis for the performance of LED devices. The failure rate, attenuation rate, optical properties and energy consumption of LED devices can be decided by the quality of the auxiliary materials. At present, China's packaging auxiliary materials supply chain has been more perfect, most of the material has been able to supply and production in the mainland. However, the high performance epoxy resin and silica gel are mostly imported. These two kinds of materials mainly require high temperature resistance, UV resistance, excellent refractive index and good expansion coefficient.

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