| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for laying out a semiconductor integrated circuit capable of generating a circuit block common power-supply wiring whole width is automatically calculated so that it becomes maximum according to a channel width with low wiring resistance, even if the channel width of a plurality of MIS transistors constituting the circuit block is not constant. SOLUTION: By referencing to a transistor region extracted in a step S1 and a design parameter, a diffusion region is generated which is formed around the transistor region to arrange a contact for biasing a well. In a step S3, the circuit block common power-source wiring for connecting a go-around power-source wiring to a lead-in power-source wiring for each circuit is automatically generated by referencing to the diffusion region.
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