Patent ID: 7005374
Filing Date: 2006-02-28
Classification: H01L

Abstract:
1. A method for forming a contact hole, said method comprising steps of: providing a substrate; forming a plurality of operation layers on said substrate as required; forming a conductive layer on the uppermost one of said operation layers; forming an anti-reflective layer on said conductive layer; forming a photoresist layer on said anti-reflective layer to define a position where said contact hole is to be formed; removing a portion of said anti-reflective layer not covered by said photoresist layer; removing said photoresist layer; partially removing a portion of said conductive layer not covered by said anti-reflective layer to form a recess, the layer beneath said conductive layer being not exposed from said recess; removing said anti-reflective layer; opening said recess of said conductive layer to form an opening to expose the layer beneath said conductive layer; and using the remaining conductive layer as a mask to form said contact hole by etching.