Patent ID: 7927961
Filing Date: 2011-04-19
Classification: H01L

Abstract:
1. A selective etching method comprising: forming a mixture comprising an organic antireflective coating (ARC) and carbon nanotubes; applying the mixture on an etching target layer, thereby forming a carbon nanotube-organic antireflective coating (ARC) composite layer; forming a photoresist pattern by exposing and developing a photoresist layer on the carbon nanotube-organic antireflective coating (ARC) composite layer to expose the carbon nanotube-organic antireflective coating (ARC) composite layer; forming a hard mask by etching the carbon nanotube-organic antireflective coating (ARC) composite layer exposed by the photoresist, thereby selectively exposing a part of the etching target layer; and selectively etching the etching target layer exposed through the hard mask.