METHOD FOR PRODUCING POLYIMIDE PRECURSOR SOLUTION, POLYIMIDE PRECURSOR SOLUTION, AND METHOD FOR PRODUCING POROUS POLYIMIDE FILM

摘要

PROBLEM TO BE SOLVED: To provide a polyimide precursor solution that makes it possible to obtain a porous polyimide film with the occurrence of pin holes reduced.SOLUTION: A polyimide precursor solution contains resin particles and a polyimide precursor. In the polyimide precursor solution, the resin particles have a volume particle size distribution having at least one maximum values. Of the maximum values, volume frequency of a maximum value with the highest volume frequency is 90% or more and 100% or less relative to volume frequency of all the maximum values in the volume particle size distribution.SELECTED DRAWING: None