Patent ID: 6303416
Filing Date: 2001-10-16
Classification: G03F,H01L,Y10S

Abstract:
A method of forming a resist pattern to reduce fluting on a substrate during an etching process, the method comprising the steps of:applying a layer of a resist material on a surface of said substrate, said resist layer having an upper portion and a lower portion;heating said resist layer and substrate;exposing said resist layer to light using a focus setting which corresponds to a negative focus shift to expose said upper and lower portions of said resist layer;heating said exposed resist layer and substrate; anddeveloping said exposed resist layer to form said resist pattern, said resist pattern having a lower portion in contact with said substrate, said lower portion having a width which is narrower than said upper portion of said resist pattern, said upper portion of said resist pattern shadowing a portion of said substrate adjacent said lower portion from the direction of a primary etch.