| 摘要 |
PURPOSE:To prevent the disconnection from an internal circuit as far as a metal wire does hot come off even if aluminum of a bonding part is corroded by arranging a polycrystalline silicon layer under an aluminum bonding pad. CONSTITUTION:A polycrystalline silicon layer 7 is arranged under a bonding pad 2 and the connection part between the bonding pad 2 and a wiring 3. The aluminum wiring 3 liable to be corroded by water content is completely protected with an insulating film 4, and not exposed. Thereby, if the aluminum around the metal wiring and the bonding part is corroded, the electric disconnection state from an internal circuit is not caused as far as the metal wire does not come off, so that the reliability is improved. |
