Patent ID: 6204150
Filing Date: 2001-03-20
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising:forming an oxidation proof layer including an aperture on a silicon substrate;forming a field oxide for device isolation in the aperture;depositing a protective layer thicker than a thickness of said oxidation proof layer on said oxidation proof layer and on said field oxide, said protective layer being composed of a selectively removable material capable of establishing a condition under which said oxidation proof layer and said field oxide are selectively removable;making said protective layer residual on only a surface of said field oxide by removing a part of said protective layer deposited during said depositing, until a surface of said oxidation proof layer is exposed;removing said oxidation proof layer;forming a gate of a transistor on a surface of said silicon substrate;depositing an oxide layer on said silicon substrate, said gate and said residual protective layer;etching said oxide layer until a surface of said residual protective layer is exposed and a side-wall of said oxide layer is formed on said gate;forming an insulating layer on the semiconductor device, said insulating layer having a contact hole formed therethrough; andconnecting a wire to said gate through said contact hole,said protective layer being a material different than said oxide layer.