Patent ID: 6514873
Filing Date: 2003-02-04
Classification: H01L

Abstract:
A method for fabricating a semiconductor device, comprising the steps of:a) depositing an organic insulating film over a semiconductor substrate; b) forming a silylated layer selectively in a top surface of the organic insulating film; and c) etching the organic insulating film using the silylated layer as a mask, thereby forming an opening, a via hole or interconnection groove, in the organic insulating film, wherein the step b) comprises the steps of: terminating a surface of the organic insulating film with hydroxyls; selectively exposing the surface of the organic insulating film to a high-energy radiation, thereby removing the hydroxyls from exposed parts of the organic insulating film; and supplying a silylation reagent onto the selectively exposed surface of the organic insulating film, thereby forming the silylated layer on the surface of non-exposed parts of the organic insulating film.