... 1:Low cost 2:fast delivery 3:quick trun pcb 4:made in china 5:cutomised pcb making Leadsintec ... discussion) . Standard thickness: 1.0, 1.5, 2.0, 3.0 mm(optional dimension for discussion) . ... : 35um, 70um, 105um, 140um, 210um . Heat conduction and insulating layer thickness: 60um Application Motor, auto-bicycle Trigger, ... energy batter base, heat sinker Board pcb and multi-layer Circuit Board design