Patent ID: 6303477
Filing Date: 2001-10-16
Classification: G03F,H01L

Abstract:
A method for manufacturing an integrated circuit structure comprising:providing a semiconductor substrate;depositing a layer to be patterned on the semiconductor substrate;depositing an organic anti-reflection coating on the layer to be patterned;depositing an organic photoresist on the organic anti-reflection coating;patterning and developing the organic photoresist to form an opening having a side wall and to expose a portion of the organic anti-reflection coating;exposing the patterned organic photoresist and the organic anti-reflection coating to radio frequency glow discharge maintained in a gas mixture;adsorbing neutral molecules produced in the radio frequency glow discharge by the organic photoresist and the exposed portion of the organic anti-reflection coating;desorbing of the neutral molecules by unidirectional particle bombardment on the exposed portion of the organic anti-reflection coating and from the organic photoresist giving access to oxygen while leaving the side wall unaffected;unidirectional decomposition of neutral molecules producing free oxygen atoms on the surface of the organic photoresist and the organic anti-reflection coating exposed to the electron-ion bombardment;removing the exposed portion of the organic anti-reflection coating; andpatterning the layer to be etched using the organic photoresist with the organic anti-reflection coating remaining under the organic photoresist as a mask.