It mainly uses in semiconductor(diode,audion etc.), special type apparatus (highvoltage silicon rectifier stack, It mainly uses in semiconductor(diode,audion etc.), special type apparatus (highvoltage silicon rectifier stack, small and special electrical machine etc.), plastic encapsulation of small,middle and large scale molectron(DIPSOPQFPBGA etc. style).Zhejiang Hengyao Electronics Material Co ...