Patent ID: 7582412

Claim:
A method for forming a photoresist relief image comprising: a) applying an organic underlayer composition coating layer on a substrate, the underlayer composition comprising (i) a first resin that comprises phenol groups; (ii) a second acrylate resin that is distinct from the first resin and comprises one or more anthracene groups; (iii) a crosslinker component that is distinct from the first resin and second resin, the crosslinker comprising a benzoquanamine compound or a melamine compound; and (iv) an acid or acid generator compound; b) applying a positive-acting photoresist composition coating layer over the underlayer composition, the photoresist composition comprising a photoactive component and one or more resins that comprise Si groups, phenolic groups and photoacid-labile groups; and c) exposing the photoresist layer to radiation having a wavelength of about 248 nm.