Mica powder is a special functional filler which can meet technological requirements of the copper-clad plate industry in all aspects.It is able to substitute electronic grade silica powder, giving the CCL ideal performance in insulation, rigidity, low expansion ratio, machinability, high-temperature resistance and stability. The material provides complete chemical inertness and will not cause any decomposition or induced reaction even in high temperature and complex situations, so it can effectively improve the drilling efficiency and quality while reducing bit wear.Huayuan Mica--Special for Electronics is becoming popular in the CCL industry.