Generally speaking, the function of the package is to provide sufficient protection for the chip to prevent the chip from failure due to long-term exposure in the air or mechanical damage, so as to improve the stability of the chip;

For LED packaging, it is also necessary to have good light extraction efficiency and good heat dissipation. A good package can allow the LED to have better luminous efficiency and heat dissipation environment, thereby increasing the life of the LED.

Packaging is a key link in the preparation of white light LEDs: the light-emitting mechanism of semiconductor materials determines that a single LED chip cannot emit continuous spectrum white light.

Therefore, two or more complementary colors of light must be mixed in the process to form white light. At present, there are three main methods to realize white light LED:

Blue LED+YAG yellow phosphor, RGB three-color LED, ultraviolet LED+multi-color phosphor, and the realization of white LED is in the packaging process.

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 region with the largest concentration of LED packaging companies and the largest packaging industry in mainland China.

The number of enterprises exceeds 2/3 of the country, accounting for 68% of the total number of enterprises in the country. Except for the slight lack of upstream LED epitaxial chips,

A large number of packaging materials and packaging equipment manufacturers and agents are gathered, and the supporting facilities are the most complete.

Followed by the Yangtze River Delta region, the number of enterprises accounted for about 17% of the country, and other regions accounted for a total of 15%.