Shenzhen Crescent Optoelectronic Co., Ltd.
Are SMD LED Beads Environmentally Friendly?
At present, more and more surface mounting device led beads have replaced conservative lighting lamps, and are used in l...
What are the Differences between COB Package and SMD Package in the Field of LED Display?
The existence of double giants in the field of LED display has jointly developed and flourished the LED industry. As a c...

What is cob Package?

COB package the full name is chips on board, it is a technology to solve the problem of heat dissipation of LED. Compared with direct plug-in and SMD, it has the advantages of saving space, simplifying packaging operation and high efficiency of thermal management.

COB packaging is to bond bare chips with conductive or non-conductive adhesives on the interconnection substrate, and then wire bonding to achieve its electrical connection. If the bare chip is directly exposed to the air, it is vulnerable to pollution or man-made damage, affecting or destroying the function of the chip, so the chip and bonding wire are encapsulated with glue. It is also called soft package.

The thermal resistance of COB packaged system is much lower than that of traditional SMD packaged system, so the service life of COB packaged LED lamps is greatly improved. Traditional SMD packages use patches to attach discrete devices to PCB boards to form light source components for LED applications. This method has the problems of spot lighting, glare and ghosting. The COB package is an integrated package and a surface light source. It has a large angle of view and can be easily adjusted to reduce the loss of light refraction.

The traditional SMD package method is to attach several different devices to the PCB board to form LED light source components. The problems of electro-optics, ghosting and glare are ubiquitous in the light source made by this packaging process. COB light source does not have the above problems. It belongs to surface light source. Its visual angle is large and easy to adjust, which reduces the loss of light caused by refraction.

Related News
  • What does SMD LED mean?

    What does SMD LED mean?

    January 19, 2019SMD LED means surface mounted light emitting diode. SMD patch is helpful to improve production efficiency and application of different facilities. It is a solid semiconductor device that can directly ...view
  • What are the Sources of Light?

    What are the Sources of Light?

    February 22, 2019The source of light, a primary color of light, it is the RGB (red, green and blue). When talking about photography in class, we mention the primary colors. In addition, we watch TV in the fluorescent ...view
  • Application of EMC Bracket in 3030 LED Ball Packaging

    Application of EMC Bracket in 3030 LED Ball Packaging

    March 13, 2019Top LED device of 3030 lamp beads mainly adopts thermoplastic plastics (TPP) bracket, which is a mature LED packaging bracket. At present, a thermoplastic resin such as PPA and PA6T are mainly used in...view
  • The Difference between COB Package and Traditional LED Package

    The Difference between COB Package and Traditional LED Package

    March 13, 2019There are few differences between COB package process and SMD production process. But COB package is more efficient in dispensing, separating, splitting and packaging. Compared with traditional SMD, i...view