Aluminium Nitride Ceramic is a ceramic with aluminum nitride (AIN) as the main crystal phase. It is a new type of ceramic material with excellent comprehensive performance, and is considered to be an ideal material for a new generation of semiconductor and electronic device packaging. Aluminum nitride ceramics have excellent properties such as high thermal conductivity, high strength, high resistivity, low density, low dielectric constant, non-toxicity, and thermal expansion coefficient matching Si, and will gradually replace traditional high-power LED substrate materials. The most promising ceramic substrate material in the future. Aluminum nitride ceramics have excellent comprehensive properties, with a theoretical thermal conductivity of 320W/(m), excellent thermal conductivity, reliable electrical insulation, low dielectric constant and loss, non-toxic and thermal expansion coefficient matching silicon.