Patent ID: 7525132

Claim:
A semiconductor integrated circuit comprising: first and second wiring pattern layers constituting a multilayer structure; and a via array layer located between the first and the second wiring pattern layers, the first wiring pattern layer including a plurality of first wiring traces each having a strip shape and the second wiring pattern layer including a plurality of second wiring traces each having a strip shape, the first and second wiring traces in the first and the second pattern layers extending in predetermined directions, the first wiring traces intersecting with the second wiring traces in a skewed manner when viewed two-dimensionally, the vias of the via array layers are located at selected intersections so as to connect the first wiring traces with the second wiring traces, in wiring regions of the first and the second wiring pattern layers, the first wiring traces and the second wiring traces are repetitively formed with predetermined intervals, some of the first and the second wiring traces being cut to form a plurality of first wiring trace pieces and second wiring trace pieces, some of the first wiring traces and the first wiring trace pieces being connected with the second wiring traces and the second wiring trace pieces to form signal wiring lines through which a signal passes, the remaining of the first and second wiring traces and the first and second wiring trace pieces serving as dummy wiring lines, and in the via array layers some of the vias connecting the first wiring traces with the second wiring traces, and the other vias serving as dummy vias.