DEVICE AND METHOD FOR DESIGNING CIRCUIT, AND COMPUTER READABLE RECORDING MEDIUM STORING CIRCUIT DESIGN PROGRAM

摘要

PROBLEM TO BE SOLVED: To reduce the labor and time required for analyzing a fault in a circuit by changing the wiring state of a non-observable circuit area into state observable by suitable replacing processing and preparing layout data on the basis of the changed wiring state. SOLUTION: The wiring state of the non-observable circuit area is changed into state observable by suitable replacing processing and the layout data are prepared on the basis of the changed wiring state. By applying suitable replacing processing to wiring composing of an observation object 2 discriminated non- observable, for example, the observation object 2 can be turned into observable state. Namely, an additional via 60 is provided on an observable wiring layer surface 43a and by electrically connecting the observation object 2 and the additional via 60 through a via 44a, wiring through the observable wiring layer surface 43a is provided in the observation object 2 so that the observation object 2 can be turned into observable state.