Patent ID: 6670106
Filing Date: 2003-12-30
Classification: G03F

Abstract:
A formation method of a pattern for use as an etching mask or ion-injection mask, the method comprising:forming a photoresist layer of a positive type on a substrate; exposing and developing the photoresist layer using an inversion mask having an opening at a site at which a pattern is desired to be formed, thereby forming an opening portion in the photoresist layer to expose the substrate at the site; applying a non-photosensitive organic film on an entire surface of the substrate including the photoresist layer, so that the non-photosensitive organic film is embedded in the opening portion, wherein the non-photosensitive organic film embedded in the opening portion absorbs exposure light which can expose the photoresist layer; wherein the non-photosensitive organic film comprises a polymer compound film including a light absorbing material and is used as an anti-reflection film; etching back an entire surface of the non-photosensitive organic film on the photoresist layer until the photoresist layer is exposed; and exposing to light and developing an entire surface of the photoresist layer to remove the photoresist layer, thereby obtaining the non-photosensitive organic film having the desired pattern for the mask.