Patent ID: 7500212

Claim:
A method of performing automatic routing of a semiconductor integrated circuit by a computer, said method comprising: generating a dummy output terminal between a first output terminal of a first circuit and a second output terminal of the first circuit; generating a dummy input terminal between a first input terminal of a second circuit and a second input terminal of the second circuit; searching for a path of a first guide wiring, having a line width wider than a regular line width, connecting the dummy output terminal and the dummy input terminal, and performing routing of the first guide wiring along the path; and passing a second guide wiring, connecting the dummy output terminal and the dummy input signal, by reducing the line width of the first guide wiring to the regular line width; and passing a first wiring connecting the first output terminal and the first input terminal, and a second wiring connecting the second output terminal and the second input terminal; wherein: the second guide wiring, the first wiring, and the second wiring are all located in the area that was occupied by the first guide wiring; and the second guide wiring is located between the first wiring and the second wiring.