Patent ID: 6780705
Filing Date: 2004-08-24
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising steps of:(a) preparing a semiconductor substrate with first and second regions being defined in a principal surface of the semiconductor substrate; (b) forming a first underlying film in said second region of said semiconductor substrate; (c) forming a first conductive film on said first region and said first underlying film; (d) forming a first insulating film on said first conductive film; (e) patterning at least two layers including said first conductive film and said first insulating film to leave a first lamination structure on said semiconductor substrate in said first region and a second lamination structure on said first underlying film in said second region, said first lamination structure being made of a portion of said first conductive film and a portion of said first insulating film stacked one upon the other, and said second lamination structure being made of a portion of said first conductive film and a portion of said first insulating film; and (f) thinning said second lamination structure so that an upper surface of said second lamination structure becomes flush with or lower than an upper surface of said first lamination structure.