... , packing and quick del FR-4, multi-layer pcb,Detailed technical requirements:layer:6material:FR4(SY)Board thickness: 1.0mmSurface ... of soldermask 10um 12Soldermask Green,Yellow,Black,Blue,White,Red,transparent photosensitive,,soldermask,Strippable soldermask13Minimum linewidth of ... ,bured via board,single board,double-sided board,multi-layer board.Hasl board,immersion gold,immersion silver,plating ...