In general, the function of the package is to provide sufficient protection of the chip to prevent the chip from being exposed to air or mechanical damage for a long time to improve the stability of the chip; for the LED package, it also needs to have good light extraction efficiency and good heat dissipation , A good package can make the LED have better luminous efficiency and heat dissipation environment, thereby improving the life of the LED.
Packaging is a key part of the preparation of white LEDs: the light-emitting mechanism of semiconductor materials determines that a single LED chip cannot emit a continuous spectrum of white light, so the process must mix two or more complementary colors of light to form white light. There are three types: blue LED + YAG yellow phosphor, RGB tri-color LED, ultraviolet LED + multi-color phosphor, and the realization of white LED is in the packaging link. Good process precision control and good materials and equipment are the guarantee of the consistency of white LED devices.
The current development of the domestic LED packaging industry is relatively mature, forming a complete LED packaging industry chain. In terms of regional distribution, the Pearl River Delta region is the most concentrated LED packaging company in mainland China and the largest packaging industry. The number of companies exceeds 2/3 of the country, accounting for 68% of the total number of companies in the country. However, there are many manufacturers and agents of packaging materials and packaging equipment, which are the most complete. The second is the Yangtze River Delta region, where the number of enterprises accounts for about 17% of the country, and other regions account for a total of 15%.
Status of domestic LED packaging industry
1) Industry output value
After years of development, China's LED packaging industry has matured. In recent years, LED packaging companies have actively participated in the listing. With the continuous increase in demand in the capital market and downstream application industries, the scale of enterprises has expanded rapidly, and the production capacity has increased rapidly. The scale of the domestic LED packaging industry has continued to expand. Reached 43.8 billion yuan, an increase of 53.68% compared with 2011, of which the output value of Guangdong reached 32.3 billion yuan, an increase of 57.56%, accounting for 73.74% of the total output value of domestic LED packaging.
The rapid growth of the output value of the domestic LED packaging industry is mainly due to the fact that most international LED packaging manufacturers have set up production bases in the country due to their optimism about the domestic application market in China, increase domestic industrial sales efforts, and expand the production capacity of domestic companies. .
2) Status of domestic LED packaging companies
There are currently more than 2,000 LED packaging companies above designated size in China, of which 2/3 are located in the Pearl River Delta region. In terms of main business, there are 8 listed companies, including Rectangle Semiconductor, Lehman Optoelectronics, Ruifeng Optoelectronics, Jufei Optoelectronics, Wanrun Technology, Hongli Optoelectronics, Guoxing Optoelectronics, Goer Acoustic , 7 other listed companies are in Guangdong Province, 5 in Shenzhen area, 1 in Foshan and 1 in Guangzhou. At the same time, some large-scale downstream application companies have set up their own packaging production lines, such as Zhenmingli Group, Dehao Runda, Qinshang Optoelectronics and so on. In addition, most packaging companies in foreign countries and Taiwan have established production bases in China. The mainland of China has become the world's largest LED packaging production base.
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