Patent ID: 7314775

Claim:
A manufacturing method of an IT-CCD including a plurality of charge transfer electrodes formed on a first insulation film on a surface of a semiconductor substrate, said manufacturing method comprising the steps of: first conductive film forming for forming a first conductive film which forms at least a part of the charge transfer electrode on the first insulation film; etching stopper layer forming for forming an etching stopper layer made of a material having etching selectivity for a material forming the first conductive film on the first conductive film; two-layer patterning for patterning the first conductive film and the etching stopper layer by photolithography to form a two-layer structure pattern of the first conductive film and the etching stopper layer; second insulation film forming for forming a second insulation film on the whole substrate surface so as to cover the two-layer structure pattern; side wall insulation film forming for anisotropic etching the second insulation film in a vertical direction so as to leave the second insulation film only on side walls of the two-layer structure pattern; second conductive film forming for forming on the insulation film a second conductive film forming at least a part of the charge transfer electrode so as to cover the whole two-layer structure pattern until the surface becomes flat; etching-back for etching back the second conductive film until the etching stopper layer is exposed; and etching stopper layer removing for removing the etching stopper layer.