| abstract |
Disclosed is a tetracarboxylic acid diester compound that is soluble in a general-purpose and safe organic solvent and is useful as a structural unit of a polyimide base resin of a negative photosensitive resin composition. A tetracarboxylic acid diester compound represented by the formula (1): (X 1 is a tetravalent organic group; R 1 is a group represented by the formula (2); a dotted line represents a bond; Y 1 is a (k + 1) -valent organic group; Rf is a part or all of H is F A substituted C1-20 linear, branched or cyclic alkyl group or aromatic group; k is 1, 2, or 3; n is 0 or 1) [Selection figure] None |