Patent ID: 7566659

Claim:
A method of forming a fine pattern of a semiconductor device comprising: forming silicon germanium (Si 1-x Ge x ) as a sacrificial layer on a substrate; forming a photoresist pattern having a predetermined pattern on the sacrificial layer; dry-etching the sacrificial layer using the photoresist pattern as an etch mask, thereby forming a sacrificial layer pattern for exposing the substrate; forming a first material layer pattern for completely filling up a region defined by the sacrificial layer pattern, wherein the first material layer pattern comprises a first material having a greater etch selectivity relative to the silicon germanium, wherein said first material layer pattern is in direct contact with said sacrificial layer pattern; removing the sacrificial layer pattern by wet-etching; and entirely filling the region where the removed sacrificial layer pattern is located with a second material, thereby forming a second material layer pattern which is in direct contact with the first material layer pattern, wherein, x is from about 0.1 to about 0.8.