Patent ID: 9632417
Date: 2017-04-25
CPC Classifications: C08L,G03F

Claim:
1. A shrink material comprising a polymer and a solvent containing an anti-vanishing solvent which does not cause a resist pattern after development to vanish, said polymer comprising recurring units having the formula (1): wherein A is a single bond or a C R R L is hydrogen, a straight, branched or cyclic, C R f is an integer of 1 to 3, s is an integer of 0 to 2, a is equal to (5+2s−f), and m is 0 or 1, said shrink material further comprising a salt having the formula (9): wherein R 11 is a straight, branched or cyclic C 1 -C 20 alkyl group, straight, branched or cyclic C 2 -C 20 alkenyl group or C 6 -C 20 monovalent aromatic ring-containing group, in which some or all carbon-bonded hydrogen atoms may be substituted by fluorine, lactone ring-containing moiety, lactam ring-containing moiety or hydroxyl moiety, and in which an ether, ester or carbonyl moiety may intervene in a carbon-carbon bond, and M + is a sulfonium, iodonium or ammonium cation.