Patent ID: 6858489
Filing Date: 2005-02-22
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming an oxide film on a semiconductor substrate comprising a surface portion of a first conductivity type; forming a first silicon layer on the oxide film; selectively forming an oxidation resistance film on the first silicon layer; forming a field oxide film by thermal oxidation in an area of the semiconductor substrate not covered by the oxidation resistance film; removing the oxidation resistance film; forming a resistance layer of a second conductivity type in the surface portion of the semiconductor substrate by ion implantation of an impurity of the second conductivity type piercing the first silicon layer and the oxide film; forming a second silicon layer covering the the first silicon layer and the field oxide film; forming a resistance bias electrode layer above the resistance layer by patterning the first and second silicon layers; and forming a wiring layer for providing the resistance bias electrode layer with a predetermined voltage.