Patent ID: 8741538
Filing Date: 2014-06-03
Classification: C07C,C08F,G03F

Abstract:
1. A polymer that exhibits changed alkali solubility under action of acid, wherein said polymer comprises a plurality of monomer units, wherein each monomer unit contains a protected alcoholic hydroxyl group in which at least one fluorine atom is present on a carbon atom adjacent to the carbon atom to which the protected alcoholic hydroxyl group is bonded, wherein the protected hydroxyl group within said monomer unit is protected with an acid dissociable, dissolution inhibiting group represented by a general formula (1) shown below: wherein, A represents a straight-chain saturated hydrocarbon group of 2 to 4 carbon atoms, or a hydrocarbon group containing a cyclic group of 4 to 15 carbon atoms with a valency of at least n+1, and n represents an integer from 1 to 4 wherein said acid dissociable, dissolution inhibiting group represented by general formula (1) bridges the plurality of monomer units.