Patent ID: 6015724
Filing Date: 2000-01-18
Classification: H01L

Abstract:
A manufacturing method of a semiconductor device comprising the steps of:forming an anodic oxide film on a gate electrode comprising aluminum;forming an interlayer insulating film over said anodic oxide film and said gate electrode;forming an opening in said interlayer insulating film to expose a portion of said anodic oxide film;removing the exposed portion of said anodic oxide film by a chromic mixture acid to deepen said opening toward said anodic oxide film and to allow a passive state film of said aluminum to be formed on a surface of a portion of said gate electrode under said opening; andremoving said passive state film using a hydrofluoric acid to form a contact hole extending from said opening to said surface portion of said gate electrode and to terminate said surface of said portion of said gate electrode by a fluorine atom.