Patent ID: 7825030
Filing Date: 2010-11-02
Classification: H01L

Abstract:
1. A method of forming a spacer, comprising: forming on a substrate a pattern structure having a sidewall which is substantially upright with respect to the substrate; forming a spacer formation layer over the pattern structure such that a portion of the spacer formation layer extends along the sidewall of the pattern structure; forming a sacrificial layer on the spacer formation layer; forming a sacrificial layer pattern covering the portion of the spacer formation layer which extends along the sidewall of the pattern structure, wherein the forming of the sacrificial layer pattern comprises anisotropically etching the sacrificial layer using a wet etching solution; and forming a spacer on the sidewall of the pattern structure by etching the spacer formation layer using the sacrificial layer pattern as a mask, wherein the forming of the sacrificial layer comprises forming a layer of luminescent material having an element in Group III on the spacer formation layer, and the forming of the sacrificial layer pattern further comprises treating the sacrificial layer with radiation.