Patent ID: 7927764
Filing Date: 2011-04-19
Classification: G03F,H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a film over a substrate; forming a photoresist over the film; exposing the photoresist using a first mask pattern, wherein a first mask opening and a second mask opening being formed in the first mask pattern, an optical proximity correction being applied to the first mask opening, a first part of the photoresist is exposed by the first mask opening, and a second part of the photoresist is exposed by the second mask opening; exposing the photoresist using a second mask pattern, wherein the second mask pattern includes a third mask opening and a fourth mask opening, an optical proximity correction being applied to the fourth mask opening, the first part of the photoresist is exposed by the third mask opening, and the second part of the photoresist is exposed by the fourth mask opening; after the exposing using the first mask pattern and the exposing using the second mask pattern, developing the photoresist to form a resist pattern; and etching the film using the resist pattern as a mask.