Solder mask
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Solder mask, solder stop mask or solder resist is a thin lacquer-like layer of polymer that is usually applied to the copper traces of a printed circuit board for protection against oxidation and to p
Printed circuit board with green solder mask coating.
Printed circuit board
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A printed circuit board, also known as a printed wiring board, is a laminated sandwich structure of conductive and insulating layers, each with a pattern of traces, planes and other features etched fr
Solder mask
…Solder mask, solder stop mask or solder resist is a thin lacquer-like layer of polymer that is usually applied to the copper traces of a printed circuit board (PCB) for protection against oxidation and to prevent solder bridges from forming between closely spaced solder pads. A solder bridge is an unintended…
Printed circuit board of a DVD player
Part of a 1984 Sinclair ZX Spectrum computer board, a printed circuit board, showing the conductive traces, the through-hole paths to the other surface, vias connecting traces on both sides, and some electronic components mounted using through-hole mounting
Proximity fuze Mark 53 production line 1944
Through-hole (leaded) resistors on a paper tape. When mounted to a PCB, the resistors are removed from the tape and their leads are trimmed to required length.