Patent ID: 7090965
Filing Date: 2006-08-15
Classification: G03F,H01L

Abstract:
1. A method for enhancing adhesion between a reworked photoresist and an underlying oxynitride film, comprising the steps of: providing a semiconductor substrate covered by a silicon oxynitride layer; forming a first photoresist layer on the silicon oxynitride layer; performing photolithography on the first photoresist layer to form a photoresist pattern layer on the silicon oxynitride layer; removing the photoresist pattern layer by oxygen-containing plasma, wherein the silicon oxynitride layer is damaged by using oxygen-containing plasma; performing a surface treatment on the silicon oxynitride layer using tetramethyl ammonium hydroxide (TMAH) solution to repair the damaged silicon oxynitride layer; forming a second photoresist layer on the silicon oxynitride layer; and performing photolithography on the second photoresist layer to form a reworked photoresist pattern layer on the silicon oxynitride layer.