... stop Service Shenzhen Prototype Oem Electronic Pcba Design Assembling Factory Welcome to SGMT PCB&PCBA Manufacturer ... Blue, transparent photosensitive soldermask, Strippable soldermask.15Minimun thickness of soldermask10um16Color of silk-screenWhite, Black, Yellow ect.17E-Testing100% E ... requirementBlind & Buried Vias and High Thickness copper21Thickness of Copper0.5-14oz (18-490um)4)Materials and ...