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<p>A <b>printed circuit board</b> (<b>PCB</b>), also known as a <b>printed wiring board</b> (<b>PWB</b>), is a <a href="page.php?w=Lamination">laminated</a> sandwich structure of <a href="page.php?w=electrical_conduction">conductive</a> and <a href="page.php?w=Insulator_%28electricity%29">insulating</a> layers, each with a pattern of traces, planes and other features (similar to wires on a flat surface) <a href="page.php?w=Chemical_milling">etched</a> from one or more sheet layers of copper laminated onto or between sheet layers of a non-conductive</p><p>
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