Patent ID: 7892982
Filing Date: 2011-02-22
Classification: H01L

Abstract:
1. A method for forming fine patterns of a semiconductor device, comprising: forming an etching film on a substrate, the substrate having first and second areas; forming first mask patterns on the substrate, the first mask patterns having a first pattern density in the first area and a second pattern density in the second area; forming first capping patterns between the first mask patterns in the first area; forming second capping patterns between the first mask patterns in the second area, such that recess areas are formed between adjacent second capping patterns, and such that a first etching pattern is defined to include the first and second capping patterns; forming second mask patterns in the recess areas, such that a second etching pattern is defined to include the first and second mask patterns; removing one of the first and second etching patterns, such that a single etching pattern is remaining on the substrate; and etching the etching film using the remaining etching pattern as an etch mask to form etching film patterns.