Patent ID: 8071273

Claim:
A photosensitive resin composition comprising a polyimide precursor having repeating units represented by the following formula (1) and a photobase generator and comprising no photoacid generator: wherein R 1 is a tetravalent organic group; R 2 is a divalent organic group; R 1 s may be the same or different from each other and R 2 s may be the same or different from each other in the repeating units; R 3 and R 4 each independently represent a monovalent organic group having a structure represented by the following formula (2) and may be the same or different from each other; R 3 s may be the same or different from each other and R 4 s may be the same or different from each other in the repeating units; and n is the number of the repeating units wherein n is 1 or greater: wherein R 5 , R 6 and R 7 each independently represent a hydrogen atom, a halogen atom or a monovalent organic group; R 8 is a monovalent organic group; R 8 s may be the same or different from each other in the repeating units; 35 mole % or less of R 8 s are organic groups having a reactive group selected from the group consisting of an ethylenic unsaturated bond, a glycidyl group, an oxetanyl group, an isocyanuric group; and R 5 , R 6 , R 7 and R 8 may be bonded to each other to form a ring structure.