| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyimide film which shows an excellence in thermal resistance and a mechanical property, and shows suppressed generation of a whisker-like object on the end surface of a slit. SOLUTION: A polyimide film is obtained by slitting with a laser beam or with a cutter, the cutter being exchanged or the blade being renewed so that the surface area of the slit does not exceed 0.045 m<SP>2</SP>. The number of the whisker-like object protruding by 2μm or more from the end surface of the film (cut disorder) is within one per 100μm of the film length. COPYRIGHT: (C)2008,JPO&INPIT |
