SOLUBLE POLYIMIDE RESIN, VARNISH, OR THESE PRODUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a soluble polyimide resin having good solubility in a solvent. SOLUTION: The soluble polyimide resin exhibits≥70.0% of a minus-sieve ratio when sieved with a sieve having 710μm opening and <20.0% of a plus-sieve ratio when sieved with a sieve having 1.4 mm opening. The resin is efficiently usable since enabling to prepare polyimide resin solution in a relatively short time by having good solubility in an organic solvent. COPYRIGHT: (C)2008,JPO&INPIT