What are the main advantages of aluminum nitride ceramics?

Aluminum nitride ceramics have excellent properties such as high thermal conductivity, high strength, high resistivity, low density, low dielectric constant, non-toxicity, and matching thermal expansion coefficient with si (Si here is actually silicon). That is, we often say chips), so this material is very suitable for making substrates (circuit boards). The same disadvantages also exist, such as high price and difficult processing, which require special ceramic engraving and milling machine for precision processing. Now this material is mainly used to make some high-end electronic products. If the semiconductor industry wants to take off quickly, it is necessary not only to make chips well, but also to make this material well as soon as possible and knock down the price!