Patent ID: 7041426

Claim:
A photoresist, comprising a polymer obtained by polycondensation of a first and a second monomer, said polymer having a main chain and having acid-cleavable groups in said main chain, said first monomer having at least one group selected from the group consisting of a fluorine group and a fluoroalkyl group, and said second monomer having a structure according to formula I: R a represents a core selected from the group consisting of a divalent alkyl core, a divalent cycloalkyl core, a divalent phenyl core, a divalent biphenyl core, and X a , X b , X c and X d , in each case independently of one another, represent one of a hydrogen atom and a fluorine atom; said second monomer being a diol, said diol having at least one group selected from the group consisting of a fluorine group and a fluoroalkyl group; a photo acid generator; and a solvent.