Patent ID: 6861372
Filing Date: 2005-03-01
Classification: H01L

Abstract:
1. A semiconductor device manufacturing method comprising: providing a substrate having a first formation area and a second formation area; forming an oxide film on the first and the second formation areas; forming an oxidation resistance film on the oxide film; masking the second formation area by disposing a photoresist on the oxidation resistance film above the second formation area; removing the oxidation resistant film above the first formation area; removing the photoresist above the second formation area; removing the oxide film above the first formation area while using the oxidation resistant film above the second formation area as a mask; forming a first oxide film on the first formation area; removing the oxide film on the second formation area and the oxidation resistance film above the second formation area without forming a photoresist; and forming a second oxide film on the second formation area, wherein the first oxide film has thickness different from the second oxide film.