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US 12,319,782 B2Granted
Phase contrast film and production method therefor
AssigneeZeon Corporation
InventorKyosuke Inoue
Life of this patent
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Abstract
A phase difference film formed of a resin containing a polymer having crystallizability, wherein: a coefficient of variation CV(Re) of an in-plane retardation of the phase difference film at a measurement wavelength of 590 nm is 1.0% or less.
Claims6
A phase difference film formed of a resin containing a polymer having crystallizability, wherein:
- the polymer has a positive intrinsic birefringence,
- a coefficient of variation CV(Re) of an in-plane retardation of the phase difference film at a measurement wavelength of 590 nm is 1.0% or less,
- an average value of a NZ factor of the phase difference film is more than 0.0 and less than 1.0,
- the phase difference film contains an organic solvent, and
- a ratio of the organic solvent relative to 100% by weight of the phase difference film is 0.01 ppm or more.
2 more elements
Dependencies are inferred from the claim text.