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Results tagged with solder-mask
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user 813
The traditionally green coating which protects copper on PCBs from oxidation and shorting due to solder. Use this tag for PCB design questions and soldering questions which require attention to the mask layer.
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What is the purpose of solder mask expansion?
If the solder mask expansion were 0, in theory -- assuming everything aligned perfectly -- the board would work fine.
In practice, things never align perfectly.
The actual hole punched in the solder …
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