| 摘要 |
A polyimide film which is a film comprising polyimide, the polyimide film containing at least one repeating unit represented by general formulas (1) and (2): [in formulas (1) and (2), R1, R2, R3 each independently indicate a hydrogen atom or the like, R4 indicates a C6-40 aryl group, and n indicates an integer of 0-12], the total of repeating units represented by general formulas (1) and (2) being 90 mol% or higher with respect to all repeating units, and the polyimide film having a 350°C coefficient of linear expansion of 10 ppm/°C or lower, and an average coefficient of linear expansion of 15 ppm/°C or lower as determined by measuring the change in length in a temperature range of 50-400°C when heated at a rate of 5°C/min in a nitrogen atmosphere. |
