Patent ID: 6372637
Filing Date: 2002-04-16
Classification: H01L

Abstract:
A method for forming a semiconductor device precursor comprising:forming a layer of conductive material in a first layer, wherein the layer of conductive material is surrounded by the first layer on at least three sides; forming a layer of a hard mask material onto at least a portion of said first layer, said hard mask material comprising a material which does not produce polymeric residue during etching and which is not removed by solvents used to remove photoresist materials from the surface of said semiconductor device precursor; forming a layer of photoresist material on said hard mask layer; patterning said photoresist layer; anisotropically etching said layer of hard mask material to expose a portion of said first layer; removing said photoresist layer; forming facets on said layer of hard mask material; and forming a via in said first layer, said via extending through said first layer to expose at least a portion of said layer of conductive material.