prototype pcb manufacturing 1.customized design 2.FR-4 3.PTH ... ) Solder Mask Color green,light green,white,black,dark brown,yellow,red,blue Min. solder mask clearance 0.003”(0.07mm ... ”-0.0007”(0.012mm-0.017mm) Silkscreen Color White,black,yellow,red,blue,green Min. Size 0.006” (0.15mm) Electrical ... 15° 30° 45° 60° Others UL Cert. YISO Cert.ISO9001TS16949YISO14000Y prototype pcb manufacturing