Patent ID: 8652712

Claim:
A process of forming a patterned material feature on a substrate, said process comprising: a) providing a material surface on a substrate; b) forming a photoresist layer over said material surface, said photoresist comprising (i) an acid-sensitive imaging polymer that is originally insoluble in aqueous, alkaline developers, but becomes soluble upon reaction with protons, with or without the aid of heating; (ii) a photoacid generator P + A − comprising; an antenna group P + comprising a cation with atom-averaged EUV photoabsorption cross-sections, and A − comprising an anion with atom-averaged EUV photoabsorption cross-sections; wherein said atom-averaged EUV photoabsorption cross-sections of said antenna group P + are greater than or substantially the same as said atom-averaged A − EUV photoabsorption cross-sections; (iii) a small amount of a base quencher; c) patternwise exposing said photoresist layer to radiation thereby creating a pattern of radiation-exposed regions in said photoresist layer whereby a differential in the solubility of said polymer in either the exposed regions or the unexposed regions is created; d) selectively removing portions of said photoresist layer to form exposed portions of said material surface, and etching or ion implanting said exposed portions of said material, thereby forming said patterned material feature.