There are three kinds of forming methods of ceramic substrate: pressing film, dry pressing and casting forming. The casting process has the highest forming production efficiency, and it is easy to realize continuous production and automation. It can improve product quality, reduce costs and realize mass production. The thickness of the production substrate can be as thin as 10m or less than 1mm. Casting forming is an important step in the practical transformation of aluminum nitride ceramic circuit board, and has an important application prospect.
