| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a negative birefringent film which is easy to control double refractive indices and, simultaneously, simple. SOLUTION: In the polymer film having negative birefringence, the negative double refractive indices are controlled by varying the amount of the residual solvent present in the film. As the polymer, a polyimide or a polyetherketone is suitably used. COPYRIGHT: (C)2003,JPO |
