Method of manufacturing a mask ROM semiconductor device

摘要

Disclosed is a method of manufacturing a semiconductor device including a gate electrode on a semiconductor substrate through a gate insulated film; source/drain regions formed to be adjacent to the gate electrode; and an Al wiring formed through an interlayer insulating film covering the gate electrode, wherein impurity ions are implanted in a surface layer of the substrate using the Al wiring and a photoresist formed thereon as a mask, and wherein no photoresist is formed on the Al wiring arranged above regions in which the impurity ions are implanted in adjacent elements.