Patent ID: 9093378
Filing Date: 2015-07-28
Classification: H01L

Abstract:
1. A method for forming patterns of a semiconductor device, comprising: forming a mask film on a substrate; forming a plurality of first patterns and a plurality of second patterns on the mask film, wherein the plurality of first patterns is substantially equally spaced apart from each other at a first distance, and the plurality of second patterns is substantial equally spaced apart from each other at a second distance different from the first distance; conformally forming a spacer film on the plurality of first patterns and the plurality of second patterns to a predetermined thickness, wherein the spacer film completely fills spaces between two adjacent second patterns of the plurality of second patterns and the spacer film partially fills spaces between the plurality of first patterns; removing a part of the spacer film, thereby forming a plurality of spacer film patterns on side walls of the plurality of first patterns; removing the plurality of first patterns and the plurality of second patterns; and forming a plurality of patterns on the substrate by etching the mask film using the plurality of spacer film patterns as a mask.