Patent ID: 9576986
Date: 2017-02-21
CPC Classifications: H01L

Claim:
1. A method for manufacturing a semiconductor device, comprising: forming a first conductive film on an insulating surface; forming a second conductive film on and in contact with the first conductive film; forming a first mask and a second mask over the second conductive film using a photo mask or a reticle each of which is provided with a pattern having a light intensity reducing function, the pattern comprising a diffraction grating pattern or a semi-translucent film wherein the first mask is partially thin; forming a first wire and a second wire by etching the first conductive film and the second conductive film using the first mask and the second mask, wherein the second wire corresponding to the second conductive film has a part narrower than the first wire corresponding to the first conductive film; forming an insulating film covering the first wire and the second wire; forming an opening portion in the insulating film, to expose at least a top surface of the first wire and a top surface of the second wire through the opening portion; and forming a third wire over the insulating film to electrically connect the first wire and the second wire therewith through the opening portion.