Difference between revisions of "Printed circuit board"
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| − | A '''printed circuit board''' (often abbreviated as | + | A '''printed circuit board''' (often abbreviated as '''PCB''') is a technology used for cost-effective production of multiple instances of a module. |
A thin fiberglass sheet has holes drilled in it, where the leads from components will be placed. It is then coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of 'traces' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the etch, leaving the traces. | A thin fiberglass sheet has holes drilled in it, where the leads from components will be placed. It is then coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of 'traces' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the etch, leaving the traces. | ||
Revision as of 03:41, 7 November 2016
A printed circuit board (often abbreviated as PCB) is a technology used for cost-effective production of multiple instances of a module.
A thin fiberglass sheet has holes drilled in it, where the leads from components will be placed. It is then coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of 'traces' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the etch, leaving the traces.
The first PCB's were single or double-sided. Later, techniques for producing so-called 'multi-layered PCBs' were deveioped; a number of thin PCBs were created, and then glued together; this allowed the production of complex circuits which could not be 'routed' with only two surfaces.
