Patent ID: 6537866
Filing Date: 2003-03-25
Classification: H01L

Abstract:
A method for forming an insulating structure on a semiconductor substrate, comprising:forming an insulating layer on a semiconductor substrate; depositing a layer of photoresist on said insulating layer; using a photolithography system to remove portions of said layer of photoresist to produce exposed and unexposed portions of said insulating layer, wherein the lateral width of the photoresist layer is equal to or greater than the minimum width resolvable by said photolithography system; anisotropically etching said exposed portions of said insulating layer; trimming said layer of photoresist to expose first additional portions of said insulating layer; anisotropically etching said first additional portions of said insulating layer; and removing the remaining portions of said photoresist layer depositing a conductive layer to cover said insulating layer, planarizing the surface of said conductive layer and exposing second additional portions of said insulating layer.