Patent ID: 7964469
Filing Date: 2011-06-21
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device including a resistor, comprising the steps of: forming a first oxide film in a convex shape on a field insulating film; forming a polycrystalline silicon film on the first oxide film; introducing an impurity into the polycrystalline silicon film; patterning the polycrystalline silicon film into which the impurity is introduced so that a portion above the convex-shaped first oxide film becomes a resistance region of the resistor; forming a second oxide film on the patterned polycrystalline silicon film; forming a third oxide film on the second oxide film; and removing the third oxide film and parts of the second oxide film and the polycrystalline silicon film to form a planarized surface including surface portions of the second oxide film and the polycrystalline silicon film.