Patent ID: 7635554

Claim:
A positive photosensitive composition comprising: (A) a resin that has an acid decomposable repeating unit represented by formula (I) and increases its solubility in an alkali developer by action of an acid; (B) a compound generating an acid upon irradiation with actinic light or radiation; (C) a hydrophobic resin insoluble in an alkali developer and having at least either one of a fluorine atom and a silicon atom; and (D) a solvent, wherein in the formula (I), Xa 1 represents a hydrogen atom, an alkyl group, a cyano group or a halogen atom, Ry 1 to Ry 3 each independently represents an alkyl group or a cycloalkyl group, and at least two of Ry 1 to Ry 3 may be coupled to form a ring structure, and Z represents a divalent linking group; and wherein the resin (C) has at least one repeating unit selected from fluorine-containing repeating units represented by formulas (1-1), (1-2), and (1-3), is stable in an acid and is insoluble in an alkali developer: wherein, in the formulas (1-1) to (1-3), R 1 represents a hydrogen atom or an alkyl group, R 2 represents a fluoroalkyl group, R 3 represents a hydrogen atom or a monovalent organic group, R 4 to R 7 each independently represents a hydrogen atom, a fluorine atom, an alkyl group, or an alkoxy group with the proviso that at least one of R 4 to R 7 represents a fluorine atom, or R 4 and R 5 or R 6 and R 7 may be coupled to form a ring, R 8 represents a hydrogen atom, a fluorine atom or a monovalent organic group, Rf represents a fluorine atom or a monovalent organic group having a fluorine atom, L represents a single bond or a divalent linking group, Q represents an alicyclic structure, and k stands for an integer from 0 to 3.