Patent ID: 7867687

Claim:
A method comprising: depositing a layer on a substrate; depositing a non-chemically amplified photoresist layer upon the layer, the non-chemically amplified photoresist layer having a developer-soluble resin that is a polyhydroxystyrene-based compound suitable for extreme ultraviolet light lithography and a photoactive compound, the photoactive compound inhibiting solubility of the developer-soluble resin, wherein the photoactive compound has groups including an oxygen containing group and a nitrogen containing group that are capable of undergoing a decomposition reaction according to a Wolff rearrangement, when exposed to an extreme ultra-violet light, to form a carbonyl acid group; exposing selected portions of the non-chemically amplified photoresist layer to the extreme ultra-violet light such that solubility of the selected portions of the non-chemically amplified photoresist layer is promoted; and developing the exposed portions of the non-chemically amplified photoresist layer.