Patent ID: 9399317
Filing Date: 2016-07-26
CPC Classification: B29C,B29K,B29L,G02B

Claim Text:
1. A method for producing a phase difference plate, comprising: a step of forming a layered body including a resin layer (a) containing a resin A having a positive intrinsic birefringence, a resin layer (b) that contains a resin B having a negative intrinsic birefringence and is provided on a surface of the resin layer (a), and a resin layer (c) that contains a resin C having a positive intrinsic birefringence and is provided on another surface opposite to the resin layer (a) of the resin layer (b); a first stretching step of stretching the layered body in one direction at a temperature T a second stretching step of, after the first stretching step, stretching the layered body in another direction that is approximately orthogonal to the stretching direction at a temperature T wherein the resin C contains a polymer X having a positive intrinsic birefringence and cross-linked particles of a polymer Y having a negative intrinsic birefringence.