Patent ID: 8093156
Filing Date: 2012-01-10
Classification: G03F,H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising: forming a first film, forming a resist film over the first film; exposing the resist film using any one of a halftone phase shift mask and a photomask having an assist pattern; forming a resist pattern on the first film, wherein the resist pattern comprises a design pattern and an unwanted pattern; and forming a resist pattern thickening material over the resist pattern, performing a thickening process to fill the unwanted pattern while the design pattern remains, and patterning the first film by etching using the resist pattern thickened as a mask, wherein the unwanted pattern is any one of a side lobe and an assist feature, the side lobe is printed from the halftone phase shift mask to the resist film, and the assist feature is formed around the design pattern in exposing by using the photomask having an assist pattern, wherein an aspect ratio of the unwanted pattern is greater than an aspect ratio of the design pattern, where the aspect ratio of the unwanted pattern and the design pattern is a ratio of a depth to a width of the unwanted pattern and the design pattern, respectively, wherein the resist pattern thickening material contains at least a resin and a compound represented by the following general formula (1) to thereby thicken the resist pattern: where X is a functional group represented by the following structural formula (1), Y is at least one of hydroxyl group, amino group, alkyl group-substituted amino group, alkoxy group, alkoxycarbonyl group and alkyl group, the number of substitution is an integer of 0 to 3, m is an integer of 1 or greater, and n is an integer of 0 or greater, where R 1 and R 2 may be identical or different and each is a hydrogen atom or substituent, Z is at least one of hydroxyl group, amino group, alkyl group-substituted amino group and alkoxy group, and the number of substitution is an integer of 0 to 3.