Patent ID: 7655560

Claim:
A manufacturing method of a wiring board, comprising: forming a first wiring over a substrate having an insulating surface; forming a first interlayer insulating film over the first wiring; forming a first contact hole in the first interlayer insulating film; forming a second wiring over the first interlayer insulating film so as to be electrically connected to the first wiring through the first contact hole; forming a second interlayer insulating film over the second wiring; forming a second contact hole in the second interlayer insulating film; and forming a third wiring over the second interlayer insulating film so as to be electrically connected to at least one of the first and second wirings through the second contact hole, wherein the first to third wirings and the first and second contact holes are formed by first to fifth photolithography steps respectively; and wherein at least one of the first to fifth photolithography steps is performed by a different exposure system from that of the other photolithography steps.