Patent ID: 8524604

Claim:
A method for forming a fine pattern of a semiconductor device, comprising: sequentially forming a first thin film and a second thin film over a target layer for patterning; forming a partition over the second thin film; removing the partition after forming spacers on sidewalls of the partition; forming a first pattern of the second thin film by etching the second thin film of a first region and the second thin film of a second region while exposing the spacers simultaneously; forming a second pattern of the second thin film having a finer line width than the first pattern by using the spacers as a mask and etching the first pattern of the second thin film in the first region; forming a first thin film pattern by using the first pattern and the second pattern of the second thin film as masks in the first and second regions and etching the first thin film; and etching the pattern target layer by using the first pattern and the second pattern of the second thin film as masks.