Polymer having a structure of polyamide, polyamide-imide, or polyimide, photosensitive resin composition, patterning process, photosensitive dry film, and protective film for electric and electronic parts

A positive photosensitive resin composition, comprising:

• (A) a polymer;
• (B) a compound having a quinonediazide structure for serving as a photosensitive agent to generate an acid by light;
• and
• (D) a solvent;
• the polymer having a polyamide structural unit, a polyamide-imide structural unit, or a polyimide structural unit, the polymer being selected from the group consisting of a polyamide, a polyamide-imide, a polyimide, a polyimide precursor, a polybenzoxazole, and a polybenzoxazole precursor, comprising a reaction product of a diamine and at least one of a tetracarboxylic dianhydride, a dicarboxylic acid, and a dicarboxylic halide;
• the diamine comprising at least one of a diamine shown by the following general formula (1) and a diamine shown by the following general formula (2);
• the tetracarboxylic dianhydride comprising phthalic anhydride structures, shown by the following general formula (3);
• and
• the dicarboxylic acid and the dicarboxylic halide each comprising benzoic acid structures, shown by the following general formula (4):
• wherein Z in the general formula (3), when “j” is 1, represents a cyclic structure having 3 to 20 carbon atoms selected from an alicyclic structure, an alicyclic structure having an aromatic ring linked therewith, an alicyclic structure having a heteroatom contained or inserted therein, and an alicyclic structure having an aromatic ring linked therewith and a heteroatom contained or inserted therein, and, Z in the general formula (3), when “j” is 0, and Z in the general formula (4) each represents any one of cyclic structures shown by the following general formulae (I);
• where the dotted line represents a bond;
• “A” represents a hydroxy group or a halogen atom;
• “j” represents 0 or 1;
• when “j” is 0, each cyclic structure Z is directly linked to the phthalic anhydride structures in the general formula (3) or the benzoic acid structures in the general formula (4);
• and when “j” is 1, X2 represents a divalent linking group, and X1 represents any one of the following general formulae (5), (6), (7), (9), and (10),
• where the dotted line represents a bond.

A polymer having a polyamide structural unit, a polyamide-imide structural unit, or a polyimide structural unit, the polymer being selected from the group consisting of a polyamide, a polyamide-imide, a polyimide, a polyimide precursor, a polybenzoxazole, and a polybenzoxazole precursor, comprising a reaction product of a diamine and at least one of a tetracarboxylic dianhydride, a dicarboxylic acid, and a dicarboxylic halide;

• the diamine comprising at least one of a diamine shown by the following general formula (1) and a diamine shown by the following general formula (2);
• the tetracarboxylic dianhydride comprising phthalic anhydride structures, shown by the following general formula (3);
• and
• the dicarboxylic acid and the dicarboxylic halide each comprising benzoic acid structures, shown by the following general formula (4):
• wherein the cyclic structure Z in the general formula (3) is a tetracarboxylic dianhydride structure shown by the following general formula (Z-1) or (Z-2):
• wherein the dotted line represents a bond;
• R1, R2, R3 and R4 are the same or different and each represent a hydrogen atom or a substituent selected from a methyl group, an ethyl group, and a linear, branched, or cyclic alkyl group having 3 to 12 carbon atoms, or alternatively, R1, R2, R3 and R4 are bonded with each other to form an alicycle or an aromatic ring;
• R7 represents a methyl group, an ethyl group, or a linear, branched, or cyclic alkyl group having 3 to 12 carbon atoms, and
• wherein the cyclic Z in the general formula (4) represents any one of cyclic structures shown by the following general formulae:
• where the dotted line represents a bond;
• “A” represents a hydroxy group or a halogen atom;
• “j” represents 0 or 1;
• when “j” is 0, each cyclic structure Z is directly linked to the phthalic anhydride structures in the general formula (3) or the benzoic acid structures in the general formula (4);
• and when “j” is 1, X2 represents a divalent linking group, and X1 represents any one of the following general formulae (5), (6), (7), (9), and (10),
• where the dotted line represents a bond.