Patent ID: 8530145
Filing Date: 2013-09-10
Classification: G03F,H01L

Abstract:
1. A method for manufacturing a semiconductor device, the method comprising: forming a film on a substrate; forming a first hard mask material over said film; forming and patterning a first resist film, as a first resist pattern, on said first hard mask material, wherein said first resist pattern covers only some of said first hard mask material and leaves part of said first hard mask material exposed and not covered by said first resist pattern; after forming said first resist pattern, etching and removing the part of said first hard mask material not covered by said first resist pattern, using said first resist pattern as an etching mask, leaving first parts of said film exposed and not covered by said first hard mask material, thereby forming a first hard mask of said first hard mask material; after the etching and removing of the part of said first hard mask material not covered by said first resist pattern and forming said first hard mask, forming a second hard mask material that is in physical contact with the first parts of said film that are exposed and not covered by said first hard mask, and on said first hard mask; after forming said second hard mask material, forming and patterning a second resist film as a second resist pattern, on said second hard mask material, wherein said second resist pattern covers only some of said second hard mask material and leaves part of said second hard mask material exposed and not covered by said second resist pattern; after forming said second resist pattern, etching and removing the part of said second hard mask material exposed and not covered by said second resist pattern, using said second resist pattern as an etching mask, leaving at least some of the first parts of said film exposed and not covered by either of said first and second hard mask materials, without substantially etching said first hard mask, thereby forming a second hard mask and leaving a part of said first hard mask that extends laterally beyond said second hard mask, and that is exposed and not covered by said second hard mask material; and after etching and removing the part of said second hard mask material exposed and not covered by said second resist pattern, etching and removing the first parts of said film that are exposed and not covered by at least one of said first and second hard masks, using, in combination, said first and said second hard masks as etching masks.