| 摘要 |
PURPOSE:To eliminate the application of a thermal impact to the junction of an aluminum wiring layer and a diffused layer even when a redundancy fuse is fused by a laser light by providing a wide wiring portion on the wiring layer for connecting the fuse with the diffused layer. CONSTITUTION:A wiring layer 2 for connecting a redundancy fuse 1 with a diffused layer 4 has a wide wiring portion 12. The portion 12 is formed as near as the layer 4. The portion 12 performs a role of a heat sink plate. In other words, when the fuse 1 fused by a laser light, the heat generated by the laser light is transmitted through the layer 2 and dissipated in the portion 12. Accordingly, the heat arrived at the junction of the layers 2 and 4 is reduced to prevent the junction from damaging due to thermal impact. |
