Patent ID: 7091518

Claim:
A semiconductor device comprising: wiring units that are arranged in a plurality of wiring layers repectively; a starting terminal that is formed with the wiring unit that is arranged in one of the wiring layers; and a connecting unit that electrically connects the wiring units in different wiring layers, wherein the starting terminal is connected to a first potential level, it is selectable whether to form the connecting unit by changing a mask pattern, it is selectable whether to form the wiring unit by changing the mask pattern, the wiring unit is connectable to either of the first potential level and a second potential level, and forms a conducting path that is continuously connected from either of the starting terminal and an arbitrary wiring unit to an output terminal via the connecting unit, the conducting path is formed with a combination of a first path and a second path, the first path extending from a lower wiring layer to an upper wiring layer from the starting terminal toward the output terminal, the second path extending from the upper wiring layer to the lower wiring layer from the starting terminal toward the output terminal, and the output terminal is either of the first potential level and the second potential level.