| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed circuit board capable of increasing resistance and controlling resistance variation in one signal line within a predetermined scope. SOLUTION: The printed circuit board includes a signal line layer and a ground layer where signal lines are disposed. The ground layer has a formed trace surface by mutually connecting a plurality of traces. An orthographic projection of the signal line to the ground layer mutually intersects with sides of the traces in the ground layer through which the orthographic projection passes. Namely, because the orthographic projections of every signal line to the ground layer are not overlapped on each side of the traces in the ground layer through which the orthographic projection passes, the system can control the resistance of one signal line, vary the resistance in a small scope, and increase quality in signal transmission. COPYRIGHT: (C)2008,JPO&INPIT
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