Patent ID: 6251804
Filing Date: 2001-06-26
Classification: H01L,Y10S

Abstract:
A method for enhancing adhesion of photo-resist to the surface of a silicon nitride layer on a semiconductor wafer, the method comprising:performing an oxidation process on the surface of the semiconductor wafer using an oxidant to transform most of the dangle bonds and Si-N bonds on the surface of the silicon nitride layer into Si-O bonds or Si-ON bonds, wherein the oxidation process is performed by contacting the semiconductor wafer with a solution comprising ozone-dissolved deionized water, sulfuric acid or hydrogen peroxide;forming an HMDS (hexamethyl disilazane) layer on the surface of the silicon nitride layer;forming a photo-resist layer on the surface of the HMDS layer; andperforming a soft bake process to remove solvents from the photo-resist layer.