FR-4, multi-layer pcb,Power supply PCB production and pCB assemblying, including material purchasing test, packing and quick del FR-4, multi-layer pcb ... of finish boar23inch*35inch10Rang of finish baords Thick0.21-7.0mm11Minimun thickness of soldermask 10um 12Soldermask Green,Yellow, ... 2004 and the UL approval.we provide PCB layout,PCB design,PCB fabricaton,PCBA,PCB assembly,FPC,rigid board,flex board, ...