Patent ID: 7083835

Claim:
A multilayer compensator comprising one or more polymeric A layers and one or more polymeric B layers, wherein: said A layers comprise a polymer having an out-of-plane (Δn th ) birefringence not more negative than −0.01; said B layers comprise an amorphous polymer having an out-of-plane birefringence more negative than −0.01, where the polymers of said B layers do not have chromophores off of the backbone; the multilayer compensator is biaxial, where the overall in-plane retardation (R in ) of said multilayer compensator is greater than 20 nm and the out-of-plane retardation (R th ) of said multilayer compensator is more negative than −20 nm; and wherein the term “amorphous” means that the polymer does not show long-range order as measured by X-ray diffraction.