Patent ID: 6815335
Filing Date: 2004-11-09
Classification: H01L

Abstract:
A method for forming a contact of a semiconductor device comprising the processes of:i) forming an interlayer dielectric film on a semiconductor substrate including a contact formation portion; ii) successively forming a polysilicon film and an anti-reflective layer on the interlayer dielectric film; iii) forming a first mask pattern on the anti-reflective layer, the first mask pattern including a first opened portion corresponding to the contact formation portion; iv) forming a second mask pattern exposing the polysilicon film by etching the anti-reflective layer exposed through the first mask pattern; v) forming a third mask pattern by attaching polymer on a sidewall of the second mask pattern, the third mask pattern including a second opened portion smaller than the first opened portion; vi) forming a contact hole exposing the contact formation portion by etching the polysilicon film and the interlayer dielectric film using the third mask pattern as an etching mask; and vii) filling the contact hole with a conductive material.