Patent ID: 7713595

Claim:
A method of forming a multilayer optical compensation film, comprising: coating one or more first layers and one or more second layers onto a carrier substrate; and stretching the first layers and second layers simultaneously, wherein one or more first layers include a polymer having an out-of-plane birefringence (Δn th ) not more negative than −0.005 and not more positive than +0.005; wherein the one or more second layers include a polymer having an out-of-plane birefringence more negative than −0.005 or more positive than +0.005; and wherein the overall in-plane retardation (R in ) of the multilayer optical compensation film is greater than 20 nm and the out-of-plane retardation (R th ) of the multilayer optical compensation film is more negative than −20 nm or more positive than +20 nm.