Patent ID: 6875554

Claim:
A positive photosensitive polyimide resin composition, comprising: (a) a solvent-soluble polyimide containing repeating units represented by the following formula (1): wherein R 1 is a tetravalent organic group derived from a tetracarboxylic acid or a derivative thereof, R 2 is a bivalent organic group derived from a diamine, provided that from 1 to 100 mol % of R 2 units have at least one functional group selected from the group consisting of a phenolic hydroxyl group, a carboxyl group, a thiophenol group and a sulfonic group, and k is an integer, the polyimide having a reduced viscosity ranging from 0.05 to 5.0 dl/g as measured at a concentration of 0.5 g/dl in N-methylpyrrolidone at a temperature of 30° C.; (b) a photosensitive orthoquinonediazide compound; and (c) from 0.1 to 50 wt %, based on the total weight of all polymers of the composition, of a component (c1) or (c2), wherein: component (c1) is a solvent-soluble polyimide containing repeating units represented by the following formula (2): wherein R 3 is a tetravalent organic group derived from a tetracarboxylic acid or derivative thereof, R 4 is a bivalent organic group derived from a diamine, provided that from 1 to 100 mol % of R 4 units have at least one functional group selected from the group consisting of a long chain alkyl group having at least 6 carbon atoms and a fluorinated alkyl group, and 1 is an integer, the polyimide having a reduced viscosity ranging from 0.05 to 5.0 dl/g as measured at a concentration of 0.5 g/dl in N-methylpyrrolidone at a temperature of 30° C.; and component (c2) is a polyamic acid containing repeating units represented by the following formula (3): wherein R 5 is a tetravalent organic group derived from a tetracarboxylic acid or a derivative thereof, R 6 is a bivalent organic group derived from a diamine, provided that from 1 to 100 mol % of R 6 units have at least one functional group selected from the group consisting of a long chain alkyl group having at least 6 carbon atoms and a fluorinated alkyl group, and m is an integer, the polyamic acid having a reduced viscosity ranging from 0.05 to 5.0 dl/g as measured at a concentration of 0.5 g/dl in N-methylpyrrolidone at a temperature of 30° C.