PCB factory china：These inspections are indispensable before the PCB is shipped
As PCB factory china knows that, in addition to the complicated process of producing PCB, there are still many inspections to be done before shipment. What are the specific inspections? Today, we will share with you:
1. PCB inspection standard
* Standards set by each country;
* Military standards of each country;
* Industry standard such as SJ/T10309;
* PCB inspection operation instructions formulated by equipment suppliers;
* Technical requirements marked on the PCB design drawings.
2. Basic inspection
Sheet Information: Type, Finished Sheet Thickness, Outer Copper Foil, Inner Copper Foil, Warpage, Ink, Color, Position, Marking, Minimum Line Width, Line Spacing, Ring Width, Solder Mask, Surface Treatment, Special Process , test items, films, etc.
3. Electrical performance test report
* Test category: single and double-sided, general, special, test points.
* Test parameters: current, voltage, on-resistance, insulation voltage, etc.
4. Metallographic section analysis report
Copper thickness, nickel thickness, gold thickness, lead-tin thickness, copper thickness of circuit, roughness, etching factor, coating crack, resin shrinkage, coating void, delamination, etc.
5. Impedance test, etc.
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