Patent ID: 8309280

Claim:
A positive-type photosensitive resin composition comprising (A) a polyamide resin that includes a structural unit shown by the following formula (1) and a structural unit shown by the following formula (2), and (B) a photosensitive compound, the polyamide resin (A) having a weight average molecular weight (Mw) of 5000 to 80,000, and a cured film obtained by curing the positive-type photosensitive resin composition at 250° C. having a tensile modulus of elasticity of 2.0 to 4.0 GPa and a tensile elongation of 10 to 100%, wherein X and Y represent organic groups, R 1 represents a hydroxyl group, —O—R 3 , or an organic group having 1 to 5 carbon atoms (R 1 may be the same or different when m is two or more), R 2 represents a hydroxyl group, a carboxyl group, —O—R 3 , or —COO—R 3 (R 2 may be the same or different when n is two or more), R 3 represents an organic group having 1 to 15 carbon atoms, provided that at least one R 2 is a carboxyl group when R 1 is not a hydroxyl group, and at least one R 1 is a hydroxyl group when R 2 is not a carboxyl group, m represents an integer from 0 to 4, n represents an integer from 0 to 4, Z represents —R 4 —Si(R 6 )(R 7 )—O—Si(R 6 )(R 7 )—R 5 — (wherein R 4 to R 7 represent organic groups), a represents an integer equal to or larger than one, and b represents an integer equal to or larger than zero, provided that [a/(a+b)]×100=30 to 100.