| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed circuit board capable of preventing a malfunction caused by static electricity and preventing decrease of an installation area of an electronic component.SOLUTION: The printed circuit board comprises: as wirings arranged in a multilayer way in an insulating base (20), a first wiring (31) fixed to a grand potential and a plurality of second wirings (32, 33 and 34) electrically separated from the first wiring and electrically separated from one another. Each of the second wirings has at least a portion arranged in a layer different from the layer of the first wiring so that the portion opposes to the first wiring in a thickness direction. At least one of the second wirings and the first wiring have protrusions (36) protruding toward the other wiring in the thickness direction in at least either one of the portions opposing to each other. Distance between the first wiring and the second wirings opposing via the protrusion is set to be shortest at the top end of the protrusion. Between the top end of the protrusion and the opposing portion of the other wiring opposed by the top end is formed a gap (37) for discharging static electricity to the first wiring. |
