Witgain Technology Limited
People First Integrity Service
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Power Supply PCB 6 Layer Heavy Copper 2 OZ On Each Layer Orange Solder Mask
PCB Specifications:
1 The following marks should be printed from the component side: UL Logo, Material Code, Flammability Rating, Manufacturer name or symbol as indicated in UL yellow card. This should be printed with ink.
2 PCB thickness and drill hole size specified are finished sizes.
3 The tool mark for pcb if used should be a blind hole i.e no copper or mask should be present around the tool mark from either side of the pcb.
4 All holes should be concentric with the pad center by 0.02 minimum.
5 Add date code with ink on top side, preferred format YYWW(YEAR WEEK)
6 Lead free pcbs should be marked with rohs log as shown.
7 The vendor to provide material certification for ROHS compliance with every lot and packing to be identified with PB free symbol.
8 Finished board to be packed in interleaving sulfer-free paper.
9 PCB fabrication to be as per IPC-A-600 Standards latest rev.
10 Glue dot mask should be free from the copper and green mask.
11 Instead of mesh put plain copper with green masking at all ribs.
12 Masking material should be UL approved.
13 Tin plating thickness should be 1 to 50 mircons.
14 All hole including via hole copper plating thickness should be 20 microns minimum.
15 Via holes need to be filled by solder mask plug in process.
16 Entire board should be inspected for proper plating and good workmanship. Evidence of lifting, bridging, under or over etching , damaged pads or breakout will not be accepted.
17 All lettering and patterns should be legible and complete with no missing or broken lines or filled in symbols.