Photosensitive insulating resin composition, cured product thereof and ABA block copolymer
A photosensitive insulating resin composition includes a block copolymer, a crosslinking agent, a photosensitive compound, and a solvent. The block copolymer includes a first structural unit shown by a following formula (1) and a second structural unit shown by a following formula (2), wherein R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R 2 represents an alkyl group having 1 to 4 carbon atoms.
1. A photosensitive insulating resin composition comprising:
a block copolymer comprising:
a first structural unit shown by a following formula (1); and
a second structural unit shown by a following formula (2);
a crosslinking agent;
a photosensitive compound; and
a solvent,
wherein R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R 2 represents an alkyl group having 1 to 4 carbon atoms, and wherein the block copolymer is an ABA block copolymer comprising a first block including a first structural unit shown by formula (1), and a second block including a second structural unit shown by formula (2), the first block bonded to each end of the second block.
2. The photosensitive insulating resin composition according to claim 1 ,
wherein the block copolymer has a polystyrene-reduced weight average molecular weight determined by gel permeation column chromatography of about 10,000 to about 50,000.
3. The photosensitive insulating resin composition according to claim 1 ,
wherein a content of the first structural unit in the photosensitive insulating resin composition is about 40 to about 60 mol % based on a total amount (=100 mol %) of the first structural unit and the second structural unit.
4. The photosensitive insulating resin composition according to claim 1 , further comprising:
an adhesion improver.
5. The photosensitive insulating resin composition according to claim 1 , further comprising:
crosslinked particles.
6. The photosensitive insulating resin composition according to claim 1 ,
wherein the crosslinking agent comprises at least one of a first compound including two or more alkyl-etherified amino groups in molecule of the first compound, an oxirane ring-containing compound, and an oxetanyl ring-containing compound,
wherein the photosensitive compound comprises a photoacid generator, and
wherein the photosensitive insulating resin composition comprises a negative-tone photosensitive insulating resin composition.
7. The photosensitive insulating resin composition according to claim 6 ,
wherein the photoacid generator comprises a hydroxyl group-containing onium salt.
8. The photosensitive insulating resin composition according to claim 1 ,
wherein the photosensitive compound comprises a quinonediazide group-containing compound, and
wherein the photosensitive insulating resin composition comprises a positive-tone photosensitive insulating resin composition.
9. The photosensitive insulating resin composition according to claim 8 ,
wherein the crosslinking agent comprises at least one of a second compound including two or more alkyl-etherified amino groups in molecule of the second compound, and an oxirane ring-containing compound.
10. A cured product obtained by curing the photosensitive insulating resin composition according to claim 1 .
11. An ABA block copolymer comprising:
a first block including a first structural unit shown by a following formula (1); and
a second block including a second structural unit shown by a following formula (2), the first block being bonded to each end of the second block,
wherein R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R 2 represents an alkyl group having 1 to 4 carbon atoms.
12. The photosensitive insulating resin composition according to claim 2 ,
wherein a content of the first structural unit in the photosensitive insulating resin composition is about 40 to about 60 mol % based on a total amount (=100 mol %) of the first structural unit and the second structural unit.
13. The photosensitive insulating resin composition according to claim 2 , further comprising:
an adhesion improver.
14. The photosensitive insulating resin composition according to claim 3 , further comprising:
an adhesion improver.
15. The photosensitive insulating resin composition according to claim 12 , further comprising:
an adhesion improver.
16. The photosensitive insulating resin composition according to claim 2 , further comprising:
crosslinked particles.
17. The photosensitive insulating resin composition according to claim 3 , further comprising:
crosslinked particles.
18. The photosensitive insulating resin composition according to claim 4 , further comprising:
crosslinked particles.
19. The photosensitive insulating resin composition according to claim 12 , further comprising:
crosslinked particles.
20. The photosensitive insulating resin composition according to claim 13 , further comprising:
crosslinked particles.