What does COB mean in LED industry and what are its main applications?

COB light source is an integrated surface light source technology with high light efficiency, in which the LED chip is directly attached to the mirror metal substrate with high reflectivity. This technology cancels the concept of bracket, and there is no electroplating, reflow soldering and mounting process, so the process is reduced by nearly one third and the cost is also saved by one third.

At present, the COB module of chip integration belongs to personalized packaging, which is mainly designed and produced for some personalized application products, and has not yet formed the mainstream product form.

The traditional LED mode is: LED light source discrete device →MCPCB light source module →LED lamps, mainly because there is no ready-made suitable core light source component, which is not only labor-consuming and time-consuming, but also costly.

In fact, we can combine "LED light source discrete device →MCPCB light source module" into one, directly integrate LED chips on MCPCB to make COB light source module, and take the route of "COB light source module →LED lamps", which not only saves labor and time, but also saves the cost of device packaging.

Extended data:

manufacturing process

COB Chip On Board (COB) technology firstly covers the silicon wafer attachment point with thermal conductive epoxy resin (generally epoxy resin mixed with silver particles) on the substrate surface, then directly attaches the silicon wafer to the substrate surface, and carries out heat treatment until the silicon wafer is firmly fixed on the substrate, and then directly establishes the electrical connection between the silicon wafer and the substrate through wire bonding.

References:

Cob light source _ Baidu Encyclopedia