| 摘要 |
PURPOSE:To prevent local deterioration of the breakdown strength of a drain by a constitution wherein diffused layers forming two groups are connected checkerwise with different wirings, and each diffused layer in one group is formed in a polygonal shape having sides facing eight or more sides of a gate electrode. CONSTITUTION:Two groups are formed with diffused layers 2 and 3, respectively. The diffused layers are connected checkerwise with different wirings, respectively. Each diffused layer 2 in at least one group is firmed in a polygonal shape having the sides facing the eight or more sides of a gate electrode 1. In this way, the drain diffused layer 2 and the gate electrode 1 which is formed so as to face the layer 2 are formed in an octagonal shape. Therefore, acute angle parts are not formed in the drain diffused layer 2. The corner parts of the gate electrode are removed so that the gate electric field is hard to concentrate. The local deterioration of the breakdown strength of the drain can be suppressed. |
