Obliquely tilted discotic phase compensation films

A three-step method was developed to fabricate the obliquely tilted discoti c negative birefringence phase compensation films. Model fitting reveals th at the tilt angle of the discotic directors is about 46 degrees from surfac e normal. The total phase retardation value of the film can be controlled b y the discotic layer thickness. These asymmetric phase retardation films ar e useful for widening the viewing angle of a liquid crystal display device.