Patent ID: 7696081
Filing Date: 2010-04-13
Classification: G03F,H01L,Y10S

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: preparing a phase shift mask including a predetermined light transmission pattern, and a normal photomask including a predetermined light transmission pattern; stacking a first wiring layer on a semiconductor substrate, and further stacking, on the first wiring layer, a second wiring layer constituted by including a second wiring which is connected to a wiring of the first wiring layer, and a third wiring which is not connected to the wiring of the first wiring layer; stacking an interlayer insulating film on said second wiring layer; forming, in said interlayer insulating film, a first opening in which said second wiring is exposed, and a second opening in which said third wiring is exposed by photolithography using said normal photomask; burying a metal in said first opening and said second opening; and providing a pad to be overlaid on said first and second openings in which said metal is buried, wherein in said step of stacking said first and second wiring layers, at least some of wirings of the first and second wiring layers are formed by photolithography using said phase shift mask.