. . "An area (area hatched left-side up) CS between the cell area including four basic cells C1 to C4 and the edge of the circuit CT is a circuit peripheral area CS. The thinnest dummy insulating film can be formed in any one of the in-cell area TC, i.e., an area other than elements in the in-cell area, inter-cell area TR and circuit peripheral area CS. In the following, description will be made on for" . .