| 摘要 |
PROBLEM TO BE SOLVED: To enhance the utilizing efficiency of a chip area while preventing the occurrence of latchup in the case of designing a semiconductor device by the standard cell system. SOLUTION: Input output cells are configured into core parts 201, 203 configuring transistors, a guard band, and space parts 202, 204. A plurality of the input output cell core parts 201, 203 are placed adjacent to each other. Whether or not a problem of latchup takes place in the combination of the input output cell core parts 201, 203 adjacent to each other is discriminated. When there is any problem, cells configuring the guard band and the space parts 202, 204 proper to the respective input output cell core parts 201, 203 are provided between the input output cell core parts 201, 203 adjacent to each other, and when there is no problem, no cells configuring the guard band and the space parts 202, 204 proper to the respective input output cell core parts 201, 203 are provided between the input output cell core parts 201, 203 adjacent to each other. COPYRIGHT: (C)2004,JPO
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