Patent ID: 7371507

Claim:
A method for fabricating a semiconductor device comprising: forming a conductive layer; depositing an interlayer dielectric layer on the conductive layer; forming an anti-reflective coating layer on the interlayer dielectric layer; forming a photoresist pattern on the anti-reflective coating layer; dry-etching the anti-reflective coating layer and the interlayer dielectric layer in an etching chamber using the photoresist pattern as a mask to expose a predetermined portion of the conductive layer; weakening a coherence of a residual layer by performing an Ar plasma treatment using a sputtering effect of the Ar plasma ions in the etching chamber to affect the residual layer deposited during the dry-etching of the anti-reflective coating layer and the interlayer dielectric layer; and performing a fluoric based plasma treatment comprising C x F x plasma to remove the weakened residual layer, wherein the weakened residual layer is removed by the chemical reaction of an electron with a radical of the C x F x plasma.