Main Page | See live article | Alphabetical index On a printed circuit board, a signal trace is the printed circuit equivalent of a wire for carrying electrical signalss. Each trace consists of a flat, narrow part of the copper foil that remains after etching. Signal traces are usually narrower than power / ground traces because their current carrying requirements are often much less. See also: ground plane stripline This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.