Patent ID: 6974655

Claim:
A chemically amplified photo-resist, comprising: a polymer having a polar group, acid-labile radicals attached to said polar group to be eliminated for increasing solubility of the polymer in polar developers, and anchor groups for attaching to a linking group of a consolidating agent, the polymer including first repeating units having a structure according to Formula I where A is selected from the group consisting of a single bond, —O—, and —C(O)—O—; B is selected from the group consisting of —(CR 5 R 6 ) n —, —(O—(CR 5 R 6 )) n —, a cyclo-alkylene group having from 5 to 20 carbon atoms, and an arylene group having from 6 to 22 carbon atoms; R 1 is selected from the group consisting of —H, an alkyl group having from 1 to 10 carbon atoms, —CN, and —CF 3 ; R 2 , R 3 , and R 4 are each selected from the group consisting of an alkyl group having from 1 to 10 carbon atoms, a cycloalkyl group having from 5 to 20 carbon atoms, an aryl group having from 6 to 22 carbon atoms, and a siloxane group; R 5 and R 6 are selected from the group consisting of —H and an alkyl group having from 1 to 10 carbon atoms; and n is an integer from 0 to 6; and if A is a single bond, then B is a —CH 2 — group, R 1 is —H, R 2 , R 3 , and R 4 may not simultaneously be a CH 3 group, and A and B are chosen so that no Si—O—C group is formed; second repeating units derived from unsaturated carboxylic acid anhydrides selected from the group consisting of maleic anhydride, itaconic anhydride, cyclohexenedicarboxylic anhydride, norbornenedicarboxylic anhydride, and methacrylic anhydride; third repeating units derived from the acidic methyl or ethyl monoesters of an unsaturated dicarboxylic acid selected from the group consisting of maleic acid, itaconic acid, cyclohexenedicarboxylic acid and norbornenedicarboxylic acid; and fourth repeating units derived from an unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, cyclohexenecarboxylic acid, and norbornenecarboxylic acid, wherein said carboxyl groups of said fourth repeating units are esterified with an acid-labile radical; a photoacid generator; and a solvent.