Patent ID: 6274489
Filing Date: 2001-08-14
Classification: H01L

Abstract:
A method for manufacturing a semiconductor apparatus, comprising the steps of:forming a contact hole surrounded by a first convex portion and a second convex portion on a semiconductor substrate, the first convex portion and the second convex portion respectively including a gate insulating film on the semiconductor substrate, a gate electrode on the gate insulating film and an insulating film on the gate electrode;diffusing impurity into a portion of the semiconductor substrate placed between the first convex portion and the second convex portion through the contact hole to form an impurity diffusing region in the portion of the semiconductor substrate;forming a first semiconductor film having a first film thickness on the impurity diffusing region, the first convex portion and the second convex portion;implanting ions into the first semiconductor film to make the first semiconductor film conductive;forming a second semiconductor film on the first semiconductor film to fill up in a hollow between the first convex portion and the second convex portion for planarization, whereby a second film thickness of the second semiconductor film in the hollow is thicker than the first convex portion and the second convex portion;implanting ions into the second semiconductor film with an ion accelerating energy enough to make the second semiconductor film on the first convex portion and the second convex portion conductive but not enough to make the second semiconductor film in the hollow conductive, whereby the first semiconductor film is connected electrically with the second semiconductor film on the first convex portion or the second convex portion;forming a silicide film on the second semiconductor film;patterning the silicide film, the second semiconductor film and the first semiconductor film to form an electrode wiring film;forming an interlayer insulating film over an entire surface;forming an opening hole in the interlayer insulating film to expose a surface of the electrode wiring film, the opening hole located over the contact hole; andforming a metal wiring film to connect to a surface of the electrode wiring film through the opening hole.