Patent ID: 7108955

Claim:
A polysiloxane having a structural unit (I) and/or structural unit (II) shown by the following formula (1), having an acid-dissociable group dissociable with an acid, and possessing a polystyrene-reduced weight average molecular weight determined by gel permeation chromatography (GPC) in the range of 500–1,000,000, wherein R 1 represents: a monovalent aromatic group having 6–20 carbon atoms substituted with at least one group selected from the group consisting of a fluorine atom and a fluoroalkyl group having 1–10 carbon atoms; or a monovalent alicyclic group having 3–15 carbon atoms substituted with at least one group selected from the group consisting of a fluorine atom and a fluoroalkyl group having 1–10 carbon atoms; wherein the monovalent aromatic group or the monovalent alicyclic group is optionally substituted with a monovalent organic group comprising an acid-dissociable group, a halogen atom other than fluorine, an alkyl group having 1–10 carbon atoms, a hydroxyl group, or a carboxyl group; and R 2 represents: a monovalent aromatic group having 6–20 carbon atoms substituted with at least one group selected from the group consisting of a fluorine atom and a fluoroalkyl group having 1–10 carbon atoms; a monovalent alicyclic group having 3–15 carbon atoms substituted with at least one group selected from the group consisting of a fluorine atom and a fluoroalkyl group having 1–10 carbon atoms; a hydrogen atom; a halogen atom; a monovalent hydrocarbon group having 1–20 carbon atoms; a haloalkyl group having 1–20 carbon atoms; or a primary, secondary, or tertiary amino group.