Patent ID: 6995395
Filing Date: 2006-02-07
Classification: B32B,G02B,G02F

Abstract:
1. A multilayer compensator polymeric film for a LC cell comprising two or more first type layers having an out-of-plane birefringence not more negative than −0.005 and one or more second type layers having an out-of-plane birefringence more negative than −0.005, wherein the second typelayers are amorphous and comprise selected polymeric materials having sufficient thickness so that the overall in-plane retardation (Re) of the compensator is from 0 to 300 nm and the out-of-plane retardation (Rth) of at least one of the one or more second type layers is more negative than −20 nm wherein: (a) the first type layer is present that is contiguous to the second type layer and is between all of the second type layers and all of the other first type layers; (b) at least one of the second type layers or one of the other first layers is a layer coated from an organic solvent; and (c) the contiguous first type layer contains a polymer that is water soluble or water dispersible in an amount sufficient to impede the diffusion of the organic solvent between the other first layers and the second type layers.