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Ceramic substrate manufacturers share the expensive aluminum nitride ceramic substrate?

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DPC ceramic substrate manufacturers have introduced a long time in the development of ceramic substrates in China. In 2012, there has been a small climax, but because there is no way to break through the process, the demand is not great. What is the reason why aluminum nitride ceramic substrates are generally more expensive than ordinary boards?
Background used for ceramic substrates
With the improvement and refinement of industrial requirements, limited by heat dissipation and thermal expansion coefficient matching, when traditional substrate performance is difficult to meet new demands, people have to start to seek alternatives, in the process of seeking A variety of needs will naturally be compared to a variety of substrates, the best choice.
Metallization technology of ceramic substrates
The aluminum nitride ceramic substrate combines the metal layer and the ceramic more closely, and the bonding strength between the metal layer and the ceramic is high, and the maximum can reach 45, Pa (the strength of the ceramic piece itself larger than 1 mm). The aluminum nitride substrate has a metal film layer with a firmer and lower resistance, and the thickness of the conductive layer can be arbitrarily customized within a range of 1 μm to 1 mm.
Aluminum nitride ceramic substrate
Special features of ceramic substrates

Compared with the traditional ceramic substrate, the thermal conductivity of the aluminum-based substrate is 1 to 2 W/mk. Although the thermal conductivity of the copper itself reaches 383.8 W/mK, the thermal conductivity of the insulating layer is only about 1.0 W/mK, which is better. 1.8W/mK. The aluminum nitride ceramic substrate has a higher thermal conductivity and the data is 170 to 230 W/m.k.

DPC ceramic

The thermal expansion coefficient, especially the thermal conductivity of the ceramic substrate, has become a favorite of LED high-power lamp beads. Not only insulation, but also good pressure resistance, corrosion resistance and other characteristics because it is more favored.
In addition, the aluminum nitride ceramic substrate does not contain organic components, the copper layer does not contain an oxide layer, has a long service life, and can be used for a long time in a reducing atmosphere, and is suitable for aerospace equipment.
Aluminum nitride ceramic substrates are widely used in the market. Due to their low frequency loss and low dielectric constant, high-frequency circuits can be designed and assembled, and high-density assembly, line/pitch (L) can be performed. /S) The resolution can reach 20μm. In the current trend of light and small, it is very conducive to the short, small, light and thin device.
The application of DPC ceramic substrate is very extensive. It not only solves the problem of high-power heat dissipation of LED, but also makes the sensor of the automobile corrosion-resistant, high-temperature resistant, etc., and the process technology of recent ceramic substrates is continuously improved, and the demand for ceramic substrates is increasing. The bigger it is.
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