... PCB board 15 years of experience in PCB industry. Good after services. UL,SGS,ISO9001,RoHS,QS9000 and TS16949 Our PCB ... FR-4, CEM-3, Teflon, aluminum, Rogers, high TgSurface finishing: lead-free HASL, immersion gold/tin/silver ... , 0.25/0.25mmSolder mask: ±0.075mmLayer to layer: ±0.060mmCopper feature to holes (outer): ±0 ... .075mmMinimum plated drills to copper (inner): 2 to 8L 0.25mm, 10 to 22L 0. ...