Patent ID: 8470917

Claim:
A fluorinated polyimide solution, wherein: the polyimide solution has a viscosity of 1 Pa·S or higher; the polyimide solution is produced by a method comprising a step of mixing a mixture containing a polyamide acid defined by the following formula (I): wherein X represents a divalent organic group selected from a divalent aryl group, a divalent aryloxy group and a divalent arylthio group, wherein the divalent organic group is optionally substituted by the group consisting of a halogen atom, a methyl group and a trifluoromethyl group; Y represents a divalent organic group; Z represents chlorine atom, bromine atom, or iodine atom; p represents an integer of 1 to 3; q represents an integer of 0 to 2; and p+q=3, a cyclodehydration reagent and a solvent by a rotation-revolution mixing method; the cyclodehydration reagent is a tertiary amine; an amount of the tertiary amine is 0.005 to 0.2 equivalents to 1 equivalent of amide unit of the polyamide acid; and the polyimide is defined by the following formula (II): wherein X,Y, Z, p and q are the same as defined above.