... of manufacturing many types of specail board. The products are including Al base, Iron base, Brass base, steel base, Ceramic and Teflon Board ... . Copper foil thickness: 35um, 70um, 105um, 140um, 210um . Heat conduction and insulating layer thickness: 60um Application Motor, auto-bicycle Trigger, voltage ... power Solar-energy batter base, heat sinker Board pcb and multi-layer Circuit Board design