Patent ID: 7534547

Claim:
A photosensitive resin composition, comprising: a base resin; a photosensitizer; and a photoactive compound usable in combination with the photosensitizer, said compound being represented by the following formula (1): A-[(J) m -(X-Pro)] n (1) wherein A represents a hydrophobic unit comprising at least one hydrophobic group selected from the group consisting of a hydrocarbon group and a heterocyclic group, J represents a connecting group, r represents 0 or an integer of not less than 1, X-Pro represents a hydrophilic group protected by a protective group Pro which is removable by light exposure, m represents 0 or 1, and n represents an integer of not less than 1, wherein, the compound is represented by the following formula (4b), wherein, Z 2 and Z 3 are the same or different, each representing a hydrocarbon ring or a heterocycle; A 3 represents a connecting group selected from the group consisting of a direct bond, an alkylene group, an alkenylene group, an alkynylene group, a cycloalkylene group, an arylene group, an oxyalkylene group, an alkyleneoxy group, an ether group, a thioether group, a carbonyl group, a carbonyloxy group, an oxycarbonyl group, an amide group, a urethane group, a urea group and a sulfonyl group; s and u are the same or different, each denoting 0 or 1; J 1a and J 1b are the same or different, each representing a connecting group different from A 3 ; R 1a and R 1b are the same or different, each representing a halogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl group, a cycloalkyl group, an aryl group, an aralkyl group or a silicon-containing group; each of the factors, n1 and n2, independently represents 0 or an integer of not less than 1, and n1+n2≧1; and J, r, m, and X-Pro have the same meanings defined above, the protective group Pro is: (i) a protective group for a hydroxyl group, selected from the group consisting of an alkoxyalkyl group, an acyl group, an alkoxycarbonyl group, a crosslinked cyclic alicyclic group, and an alkylsilyl group; or (ii) a protective group for a carboxyl group, selected from the group consisting of an alkyl group, a crosslinked cyclic alicyclic hydrocarbon group, a lactone ring group, and a carbamoyl or N-substituted carbamoyl group, and further wherein at least one of the following conditions (i)-(v) is present: (i) A 3 is, an alkynylene group, a condensed hydrocarbon ring group, an oxyalkylene group, or an alkyleneoxy group and s=1; (ii) at least one of R 1a and R 1b is a silicon-containing group, r is 0 or 1 to 6 for the ring Z 2 , and r is 1 to 6 for the ring Z 3 ; (iii) A 3 is a carbonyloxy group or an oxycarbonyl group, R 1a and R 1b are each an alkoxy group, s=1, r is 0 or 1 to 6 for the ring Z 2 , r is 1 to 6 for the ring Z 3 , and n1+n2=1; (iv) A 3 is a carbonyloxy group or an oxycarbonyl group, J is an alkenylene group or an alkynylene group, s=1, and m is 1; or (v) A 3 is a carbonyloxy group, an oxycarbonyl group, or a sulfonyl group, the protective group Pro is an alkoxyalkyl group, and s=1.