| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymer solution allowing for formation of a transparent polyimide-based film which has excellent optical characteristics and quality, and can be industrially produced and used, and to provide the transparent polyimide-based film.SOLUTION: In a polyimide-based film excellent in heat resistance and transparency, a polymer solution is used which contains 100 ppm or more and 2 mass% or less of fine particles having an average particle size of 0.05 μm or more and 1 μm or less in a polyimide resin having an amount of a terminal amino group of 50 eq/g or less or a precursor thereof, at least one fine particle-containing layer is formed, and thereby a polyimide-based film excellent in optical characteristics and quality can be industrially produced.SELECTED DRAWING: None |
