| abstract |
Provided are: a polyimide-based film having a small high-temperature hysteresis gap; a polyimide-based composition capable of forming same; and a film manufacturing method using same. The polyimide-based film, for a thickness of 10 ㎛ thereof, has a yellow index of 15 or lower, a glass transition temperature of 350°C or higher, a coefficient of thermal expansion of 30 ppm/°C or less, and a high-temperature hysteresis gap of 80 ㎛ or less in the temperature range of 50-350°C. |