Method of fabricating an opening with deep ultra-violet photoresist

摘要

A method of fabricating an opening with a deep ultra-violet photoresist layer. An insulating layer is formed on a substrate having a device structure. A deep ultra-violet photoresist layer with a first opening is formed on the insulating layer and a hard mask layer is then formed on the surface and the sidewalls of the deep ultra-violet photoresist layer. The first opening is used to pattern the insulating layer to form a second opening within the insulating layer wherein the hard mask layer is to protect the deep ultra-violet photoresist layer. The deep ultra-violet photoresist layer and the hard mask layer are removed to expose the insulating layer and a desired opening is thus accomplished.