| 摘要 |
PROBLEM TO BE SOLVED: To provide a biaxially stretched multilayered laminated film excellent in humidity resistance and thermal dimensional stability and having optical isotropy. SOLUTION: The is constituted by alternately laminating a first layer with a thickness of 1-50 nm comprising a crystalline thermoplastic resin having positive intrinsic double refractivity and a second layer with a thickness of 1-50 nm comprising a crystalline thermoplastic resin so as to form at least 101 layers and, when the direction vertical to the surfaces of the layers is set to a z-direction and the directions crossing to z-direction at a right angle and crossing to each other at a right angle are set to an x-direction and a y-direction, the difference between the x-direction and the y-direction is 0.02 or below and at least either one of the difference between the x-direction and the z-direction and the difference between the y-direction and the z-direction is 0.02 or below with respect to the refractivity of light with a wavelength of 633 nm. COPYRIGHT: (C)2007,JPO&INPIT
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