NO Item Craft Ability 1 Surface Finish HASL, Immersion Gold, Flash Gold, Gold Plating, OSP, Immersion Tin etc. 2 Layer 2-30 layers 3 Minimum Line width 3mil 4 Minimum Line ***ce 3mil 5 Min ***ce between pad to pad 3mil 6 Minimum hole diameter 0.10 mm 7 Min bonding pad diameter 10mil 8 Max proportion of drilling hole and board thickness 1:12.5 9 Max size of finish board 23inch*35inch 10 Rang of finish board¡¯s Thickness 0.21-7.0mm 11 Minimum thickness of solder mask 10um 12 Soldermask Green,Yellow, Black, Blue, White, Red, tran***rent photosensitive, soldermask, Strippable soldermask 13 Minimum line width of Idents 4mil 14 Min Height of Idents 25mil 15 Color of silk-screen White,Yellow,Black 16 Date file format GERBER FILE and DRILLING FILE, PROTEL SERIES, PADS2000 SERIES, Powerpcb SERIES£¬ ODB++ 17 E-Testing 100% E-Testing; High Voltage Testing 18 Material for PCB High Tg Material; High Frequence£¨ROGERS ,TEFLON , TACONIC ,ARLON) ; Halogen-free Material 19 Other test Impedance, Testing, Resistance, Testing, Microsection etc., 20 Special technological requirement Blind & Buried Vias and High Thickness copper |