Patent ID: 7297466
Filing Date: 2007-11-20
Classification: G03F,Y10S

Abstract:
1. A method for patterning a layer, comprising: forming an organic anti-reflective coating over a surface of a semiconductor substrate; forming a resist layer comprising a photosensitive polymer over the anti-reflective coating, the photosensitive polymer containing a hydroxy group; subjecting the resist layer to selective exposure and development to form a resist pattern; silylating the resist pattern to a given depth by exposing a surface of the resist pattern to a vapor phase organic silane mixture of a first organic silane compound having a functional group capable of reacting with the hydroxy group of the photoresistive polymer, and a second organic silane compound having two functional groups capable of reacting with the hydroxy group of the photoresistive polymer; thermally treating the silylated resist pattern; and anisotropically etching the organic anti-reflective coating using the thermally treated resist pattern as an etching mask, wherein the photosensitive polymer includes p-hexafluoroisopropanol styrene having a formula: