Patent ID: 7892981
Filing Date: 2011-02-22
Classification: H01L

Abstract:
1. A method of forming a micro pattern of a semiconductor device, the method comprising: forming an etch target layer, a hard mask layer, a Bottom Anti-Reflective Coating (BARC) layer and a first photoresist pattern containing silicon (Si) over a semiconductor substrate; forming an organic layer over a surface of the first photoresist pattern; forming a second photoresist layer containing silicon (Si) over the BARC layer and the organic layer; performing a first etch process so that the second photoresist layer remains on the BARC layer between the first photoresist patterns and becomes a second photoresist pattern; removing the organic layer on the first photoresist pattern and between the first and second photoresist patterns, and the BARC layer formed below the organic layer; etching the hard mask layer by a second etch process using the first and second photoresist patterns as an etch mask, thereby forming a hard mask pattern; and etching the etch target layer by a third etch process using the hard mask pattern as an etch mask.