| 摘要 |
PROBLEM TO BE SOLVED: To provide a double-sided printed board for large current, without causing abnormal heat generation by permitting an excessive current to concentrate on a one conductive pattern. SOLUTION: The double-sided printed board comprises an insulating board 2 made of an insulating material, a conductive pattern 3 formed on both of the surface and rear surface of the insulating board 2, and a through-hole 4 for inserting a lead 5 of a lead component (not shown). After the lead component has been mounted on the insulating board 2 and is dipped in a solder, an additional solder 7 is filled in the through-hole 4 from the side of the lead component. A large current, flowing through the lead 5 of the lead component, is proportionally divided to the conductive pattern 3 formed on both of the surface and rear surface of the insulating board 2 for balanced shunting. The situation where an excessive current is concentrated on the one conductive pattern 3 is avoided, and unsafe phenomena occur, such as firing and smoking due to abnormal heat generation. Thus the printed board for large current can be provided with high safety and reliability. COPYRIGHT: (C)2006,JPO&NCIPI
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