Patent ID: 6020229
Filing Date: 2000-02-01
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device comprising the steps of:forming a first insulating film on a surface of a semiconductor substrate;forming a first polysilicon film used for forming an etching stopper film on said first insulating film;forming a first resist pattern on an etching stopper film area;removing a portion of said first polysilicon film which lies in an area other than said etching stopper film forming area and patterning said etching stopper film with said first resist pattern used as a mask;removing said first resist pattern;forming a second polysilicon film above said semiconductor substrate and said etching stopper film;forming a second resist pattern used for patterning said second polysilicon film;patterning said second polysilicon film with said second resist pattern used as a mask;removing said second resist pattern and then forming an inter-level insulating film on the surface;forming a contact hole so as to extend through said inter-level insulating film and said second polysilicon film, and into said etching stopper film; andforming a conductive layer in said contact hole so as to be in contact with said second polysilicon film and engaged in said etching stopper film.