The heat dissipation problem of LED package light source has always been a very important problem encountered in the development of LED products , especially the selection of heat dissipation materials, which has always been a problem for engineers. Because the thermal conductivity of the product material is very critical.
At present, ceramic materials are very good thermal conductivity materials, which have high thermal conductivity, good material properties (no shrinkage, no deformation), good insulation properties and thermal conductivity. Therefore, the use of ceramic materials will be the mainstream trend of LED product development in the future!
The following compares the relevant parameters, properties and structures of several commonly used materials for LED packaging. And illustrates the production principle of ceramic brackets commonly used in LED packaging.
LED package common material related parameters comparison chart
    Edit by: Some netizens commented that "ceramic materials are very good thermal conductivity materials", is this correct? Is the porcelain bowl for your meal at home a ceramic material? Is the heat conduction very good? According to the characteristics of the above languages, can we say that "metal is a very good material for heat conduction"? So, can we use a metal material to make a radiator?
So you can't say: "Ceramic materials are very good thermal conductivity materials"! It can only be said that some of the ceramic materials are better in heat conduction.
From the information provided, the ceramic material used is aluminum oxide. I think it is a technical retrogression to replace copper with it! Unless you are going to let the LED chip work to temperatures above 150 degrees. Everyone measured the temperature of the first and second structural chips in the figure to know that the ceramic is not good.
Everyone needs to understand that the so-called "thermally conductive ceramics" in the electronics industry (the actual heat conduction is far less than the metals such as copper and aluminum) is what it is. It is not that its thermal conductivity is stronger than that of a commonly used thermally conductive metal, but rather by the insulating properties of ceramics and the low coefficient of expansion. When these two parameters are not a problem, the use of ceramics is absolutely useless. Thermal conductivity of ceramics is not as good as copper, comparable to aluminum, high in price, difficult to process, brittle, and resistant to vibration.
Don't listen to the wind or the rain. Prompt, if you are interested, you can check out the performance of the following materials and come back to this post. Alumina, yttria, aluminum nitride, pure copper, pure aluminum, several alloy aluminum for heat dissipation, an aluminum substrate, and an insulating layer of an aluminum substrate, and the like. Take a good look at the physical properties of these materials and find out their prices.
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