Patent ID: 8173357

Claim:
A method of forming an etching mask, the method comprising: forming a mask layer on an object layer that is to be etched, to form an etching mask for etching the object layer; forming a first mask layer on the mask layer, the first mask layer having a first pattern that is to be transferred onto the mask layer; forming a second mask layer on the first mask layer, the second mask layer having a second pattern that is to be transferred onto the mask layer; obtaining a third mask layer having the first pattern and the second pattern, by transferring the second pattern of the second mask layer onto the first mask layer; and forming the etching mask for etching the object layer, by etching the mask layer using the third mask layer, wherein the forming of the first mask layer comprises: forming a first resist layer; forming a first resist pattern by patterning the first resist layer; forming a second resist pattern by contracting a resist portion of the first resist pattern; and forming a first inorganic layer on the second resist pattern.