... , made for PCB products, under RoHS, UL, SGS etc. certififcated Copper Clad Laminates sheet.Include CEM1, FR1, FR2, CEM3, FR4 .Thickness:0.6mm ... , pin hole, deep nick, pitting and glue spot on the copper foil covered face is not allowed. Any color changing or ... are not allowed .4) Usually used in PCB of computers, home electric appliances and other lines . copper clad laminates sheet,FR1,FR2,FR4,CEM1 ...