Patent ID: 6632903
Filing Date: 2003-10-14
Classification: C07C,C08F

Abstract:
A process for preparing a photoresist polymer of the formula: whereinRâ€² and Râ€³ independently represent hydrogen, or an optionally substituted linear or branched C1-C4 alkyl group; R1 and R2 independently represent hydrogen, or linear or branched alkyl, cycloalkyl, alkoxyalkyl or cycloalkoxyalkyl, each optionally substituted and having upto 10 carbon atoms; m is an integer of 1 to 8; the molar ratio of w and x are independently 0.005-0.9; and the molar ratio of y and z are independently 0.001-0.9, said method comprising polymerizing an admixture comprising: a first norbornene derivative of the formula: a second norbornene derivative of the formula: a third norbornene derivative of the formula: maleic anhydride; and a polymerization initiator, under conditions sufficient to produce the photoresist polymer.