Resin composition, resin sheet, cured film, method for producing cured film, semiconductor device, and display device

A resin composition comprising:

• (A) a resin having a structural unit as represented by the general formula (1) and/or general formula (2), (B) a phenol resin, and (C) an antioxidant, wherein the phenol resin of (B) contains a structure as represented by the general formula (3), the component (B) accounts for 5 parts by mass or more and 19 parts by mass or less relative to 100 parts by mass of the component (A), and the component (C) contains a structure as represented by general formula (5),
• and a content ratio ((B)/(C)) of the component (B) and the component (C) is 10 or more and 50 or less:
• wherein, in the general formula (1), V is a tetravalent to decavalent organic group;
• W is a divalent to octavalent organic group;
• a and b each is an integer of 0 to 6;
• R1 and R2 each is one selected from the group consisting of a hydroxyl group, carboxy group, sulfonic group, and thiol group;
• the plurality of R1's are identical to or different from each other;
• and the plurality of R2's are identical to or different from each other;
• wherein, in the general formula (2), X and Y each independently is a divalent to octavalent organic group containing two or more carbon atoms;
• R3 and R4 each independently is a hydrogen atom or a monovalent organic group containing 1 to 20 carbon atoms;
• c and d each is an integer of 0 to 4;
• and e and f each denote an integer of 0 to 2;
• wherein, in the general formula (3), R17, R18, and R19 each is a monovalent organic group containing 1 to 20 carbon atoms;
• T and U each independently is an alkylene group or alkylene oxide group containing 1 to 20 carbon atoms;
• j is an integer of 1 to 3;
• k1, k2, and k3 each is an integer of 0 to 2;
• and 1 is an integer of 3 to 100;
• wherein, in the general formula (5), R28 denotes a hydrogen atom or an alkyl group containing 1 to 15 carbon atoms and R29 denotes an alkylene group containing 2 or more carbon atoms;
• R30 denotes a monovalent to tetravalent organic group that contains at least one selected from the group consisting of alkyl groups containing 1 or more carbon atoms, alkylene groups containing 1 or more carbon atoms, C atom, O atom, and N atom;
• and m is an integer of 1 to 4.