Patent ID: 7022454

Claim:
A method for forming a photoresist relief image, comprising: (A) providing a monomer of the following Formula I: wherein R and R 1 are independently hydrogen, an ester moiety with a tertiary alicyclic group, optionally substituted alkyl, optionally substituted alkoxy, with at least one of R and R 1 being an ester moiety with a tertiary polycyclic alicyclic group, by steps comprising: (i) reacting an alicyclic alcohol with an α,β-unsaturated compound to provide an α,β-unsaturated ester; (ii) reacting the α,β-unsaturated ester with a diene to provide a norbornene compound, steps i) and ii) being conducted without isolation of the α,β-unsaturated ester prior to reaction with the diene; (B) providing a positive-acting photoresist composition by steps comprising: (a) providing an admixture of a photoactive component and polymer that comprises phenyl groups and repeat units of a polymerized monomer of Formula I and produced in step (A): (C) applying a coating layer of the photoresist composition on a substrate; and (D) exposing the photoresist composition coating layer to activating radiation and developing the exposed photoresist composition layer to yield a relief image.