| 摘要 |
The purpose of the present invention is to provide a polyimide material which exhibits excellent heat resistance and transmissivity, a low coefficient of linear expansion, and low retardation. The present invention pertains to a polyimide film containing a tetracarboxylic acid residue and a diamine residue, and characterized in that the tetracarboxylic acid residue and/or the diamine residue has a curved section, the coefficient of linear expansion is 60 ppm/K or less, and the retardation is 200nm or less. |
