Patent ID: 7157736
Filing Date: 2007-01-02
Classification: B32B,G02B,G02F

Abstract:
1. A multilayer compensator comprising: at least two polymeric first layers; and one or more polymeric second layers, wherein the first layers comprise a polymer having an out-of-plane birefringence not more negative than −0.005 and not more positive than +0.005; wherein the second layers comprise a polymer having an out-of-plane birefringence more negative than −0.005 or more positive than +0.005; wherein the overall magnitude of the in-plane retardation (R wherein one of the first layers is contiguous to a second layer and is between all of the other first layers and all of the second layers, wherein at least one of the second layers is a layer coated from an organic solvent, wherein the contiguous first layer includes a polymer that is water soluble or water dispersible in an amount sufficient to limit an amount of the organic solvent that diffuses into the first layers to be less than 75 mg/ft wherein the compensator has been stretched in at least one direction by at least 1% and not more than 60% after at least two of the first layers were assembled together.