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Signal trace
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<p>In <a href="/facts/Electronics/E4JhgISq">electronics</a>, a signal trace or circuit trace on a <a href="/facts/Printed_circuit_board/muSR2p43">printed circuit board</a> (PCB) or <a href="/facts/Integrated_circuit/fjn6vg7C">integrated circuit</a> (IC) is the equivalent of a <a href="/facts/Wire/yyy05H1S">wire</a> for <a href="/facts/Electrical_conduction/akyCKvMy">conducting</a> <a href="/facts/Signal_(electrical_engineering)/41YqUJ8c">signals</a>. Each trace consists of a flat, narrow part of the <a href="/facts/Copper/I8PEE8oX">copper</a> foil that remains after etching. Signal traces are usually narrower than power or ground traces because the current carrying requirements are usually much less. </p>