| 摘要 |
PROBLEM TO BE SOLVED: To provide polarity indication of printed circuit board for mounting an electronic component in the accurate polarity even when the polarity of electronic component mounted on the printed circuit board is varied due to a change in the specifications of a product. SOLUTION: A pair of electronic component symbols (capacitor symbols) 2a, 2b are formed to the both sides of terminal holes 1a, 1b to which terminals of an electronic component is fitted. Moreover, directions of both electronic component symbols 2a, 2b are inverted with each other. COPYRIGHT: (C)2004,JPO
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