Patent ID: 8091046
Filing Date: 2012-01-03
Classification: G03F,G06F,H01L

Abstract:
1. A method for forming a pattern comprising: depositing a process-target film on a semiconductor substrate; depositing an underlying mask film on the process-target film; delineating a first resist film on the underlying mask film; delineating a first resist pattern by transferring a pattern of a first mask onto the first resist film; delineating an underlying mask pattern having narrower line width than a line width of the first resist pattern by removing a part of the underlying mask film; delineating a second resist film on the underlying mask pattern; delineating a second resist pattern having a window portion for exposing a part of the underlying mask pattern, by transferring a pattern of a second mask onto the second resist film; and removing a part of the underlying mask pattern selectively, using the second resist pattern as an etching mask.