Patent ID: 7858516

Claim:
A method comprising: sequentially forming a non-etching layer and a sacrificial layer on a semiconductor substrate; and then forming a plurality of photo-resist layer patterns having a plurality of openings exposing the sacrificial layer; and then forming a plurality of first pattern grooves in the sacrificial layer by etching the exposed sacrificial layer to a predetermined depth using the photo-resist patterns as an etching barrier, wherein the predetermined depth is smaller than a thickness of the exposed sacrificial layer before being etched; removing the photo-resist layer; and then performing a thermal oxidation process on the sacrificial layer such that a plurality of sacrificial layer patterns spaced apart from each other are formed on the non-etching layer and an oxidation layer is formed on the sacrificial layer patterns and the non-etching layer, wherein the sacrificial layer patterns have a width smaller than a distance between the first pattern grooves and the oxidation layer has a plurality of second pattern grooves disposed between the sacrificial layer patterns; and then forming a plurality of first through-holes exposing the non-etching layer by completely removing the sacrificial layer patterns; and then forming a plurality of patterns in the non-etching layer by etching the exposed portions of the non-etching layer using the oxidation layer as an etching barrier.