Patent ID: 7615331

Claim:
A photosensitive resin composition comprising: a polymer represented by the following formula (I); a photosensitizing agent; a compound containing a methacryloyl or acryloyl group within a molecule of the compound; and a solvent: wherein Ar 1 represents a group selected from a tetravalent aromatic group and a tetravalent heterocyclic group, Ar 2 represents a group selected from a divalent aromatic group, a divalent heterocyclic group, a divalent alicyclic group and a divalent aliphatic group which may contain silicon, Ar 3 represents a group selected from a divalent aromatic group, a divalent heterocyclic group, a divalent aliphatic group and a divalent alicyclic group, Ar 4 represents a group selected from —Ar 1 (OA) 2 - and Ar 2 , A represents a hydrogen atom or a protective group capable of decomposing by a reaction with an acid, G represents a monovalent organic group bonded through a carbonyl group or a sulfonyl group, x represents a number of from 5 to 1,000, and y represents a number of from 0 to 900, provided that 0.5 mol % or more of A in the polymer represented by the formula (I) is a protective group.