Patent ID: 6562554
Filing Date: 2003-05-13
Classification: G03F,Y10S

Abstract:
A method of forming a patterned photoresist structure on a substrate, said method comprising:(A) applying a photoresist composition to said substrate to form a photoresist layer on said substrate, said photoresist composition comprising (a) a cyclic olefin polymer comprising (i) cyclic olefin units having polar functional moieties, and (ii) cyclic olefin units having acid labile moieties that inhibit solubility in aqueous alkaline solutions, (b) a photosensitive acid generator, and (c) a hydrophobic non-steroidal multi-alicyclic component containing plural acid labile linking groups, said multi-alycyclic component comprising at least two non-steroidal C7 or higher alicyclic moieties, (B) patternwise exposing said substrate to radiation whereby add is generated by said photosensitive acid generator in exposed regions of said photoresist layer by said radiation, and (C) contacting said substrate with an aqueous alkaline developer solution, whereby said exposed regions of said photoresist layer are selectively dissolved by said developer solution to reveal said patterned photoresist structure on said substrate.