Patent ID: 7153631

Claim:
A photosensitive resin composition which comprises (1) a polyimide precursor produced using an oxydiphthalic acid or acid anhydride thereof and at least one diamine as reactants for forming the polyimide precursor, wherein said at least one diamine consists of at least one diamine selected from the group consisting of diaminodiphenyl ether, diaminodiphenyl sulfone, metaphenylene diamine, p-phenylenediamine, p-xylylenediamine, diaminonaphthalene, dimethylbenzidine, dimethoxylbenzidine, diaminodiphenylmethane, diaminodiphenylsulfide, benzophenonediamine, bis{(aminophenoxy)phenyl}sulfone, hexafluoro-bis(aminophenyl)propane, bis{(aminophenoxy)phenyl}propane, dimethyl-diaminophenyl-methane, tetramethyl-diaminodiphenylmethane, bis{(aminophenoxy)phenyl}sulfone, bis(aminophenyl)propane and diaminopolysiloxane, (2) an addition-polymerizable compound, and (3) a photoinitiator, and which is adapted to be exposed and developed using an i-line stepper which uses monochromatic light, the polyimide precursor being such that a 20 μm thick firm thereof has a transmittance, at 365 nm, of at least 40%.