Patent ID: 7803517
Filing Date: 2010-09-28
Classification: H01L

Abstract:
1. A method of forming a contact hole, comprising: forming a plurality of lower patterns on a substrate; forming an insulation layer on the lower patterns; forming a self-assemble induction layer on the insulation layer; forming a recess in the self-assemble induction layer in alignment with the lower patterns; forming a block copolymer layer in the recess to form a polymer domain at a distance from a sidewall of the recess and a polymer matrix surrounding the polymer domain; removing the polymer domain; etching the self-assemble induction layer using the polymer matrix as a mask to form an opening through the self-assemble induction layer to expose the insulation layer; removing the polymer matrix during or after the etching of the self-assemble induction layer; and etching the insulation layer exposed by the opening by using the self-assemble induction layer as a mask so as to form a contact hole.