| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanism for preventing the possibility of a fire in the event of a short circuit with a little increase in cost. SOLUTION: A printed circuit board 10, having conductive lines 13, 14, 15 on the top face 11 of an insulation support 16, has a narrow line 15a at any one of the conductive lines 13-15, the range, height and thickness of the narrow line 15a are determined as a function of the maximum allowable current of the conductive line, more specifically, so that the conductive lines function as a fuse by themselves, without incorporating more elements in the conductive lines of the printed circuit board 10, and hence it is designed to narrow the conductive line 15 in part regarding its FET. |
