Polyimide lcd alignment layers

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 73/10 (2006.01) B29C 39/00 (2006.01) B29C 41/00 (2006.01) B29D 7/00 (2006.01) B32B 27/00 (2006.01) C09K 19/38 (2006.01) G02F 1/1337 (2006.01)

Patent

CA 2433747

A polyimide comprises a reaction product of at least one dianhydride and at least one diamine, wherein the at least one diamine contains a pendent mesogenic group. A method for inducing a predetermined orientation of a liquid crystal material is also disclosed. The method includes applying an alignment layer material to a substrate and buffing the alignment layer material, thereby providing an alignment layer with a pre-tilt angle, wherein the alignment layer material is a reaction product of at least one dianhydride and at least one diamine, wherein the at least one diamine contains a pendent mesogenic group.

Cette invention concerne un polymide comprenant un produit de réaction d'au moins un dianhydride et d'au moins une diamine, laquelle diamine renferme un groupe mésogène pendant. L'invention porte également sur un procédé qui permet d'induire une orientation prédéterminée d'un matériau à cristaux liquides. Ce procédé consiste a appliquer un matériau à couche d'alignement sur un substrat et à polir de matériau, ce qui permet d'obtenir une couche d'alignement présentant un angle préalable d'inclinaison. Cette couche d'alignement est un produit de réaction d'au moins un dianhydride et d'au moins une diamine, cette diamine renfermant un groupe mésogène pendant.

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