Method for manufacturing liquid crystal device

Patent metadata

Field	Value
Publication number	US-9989808-B2
Application number	US-201514976682-A
Country	US
Kind code	B2
Filing date	Dec 21, 2015
Priority date	May 15, 2008
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A method for manufacturing a liquid crystal device that includes forming an inorganic alignment layer by emitting an alignment film material that is made of an inorganic material in an oblique direction onto a substrate, and forming an organic alignment layer that is a monomolecular film made of an organic material chemically bonded with the inorganic alignment layer on a surface of the inorganic alignment layer by treating the surface of the inorganic alignment layer with a silane coupling agent that has an alkyl group, wherein a pretilt angle of a liquid crystal molecule is set to a desired angle by selecting the silane coupling agent by the number of carbon atoms.

First claim

What is claimed is:

1. A liquid crystal device comprising:
a substrate;
an alignment film which is formed on one side of the substrate;
an inorganic alignment layer having a plurality of columnar structures in which crystals grow in an oblique direction with respect to a normal line of the substrate, the inorganic alignment layer having an SiO or an SiO 2 material; and
an organic alignment layer on a surface of the inorganic alignment layer having an alkyl group and Si atom that is separate and apart from the Si of the SiO or SiO 2 material, the Si atom that is separate and apart being directly bonded to oxygen of the SiO or SiO 2 material of the inorganic alignment layer, and the Si atom that is separate and apart is directly bonding the alkyl group to the SiO or SiO 2 material of the inorganic alignment layer,
wherein the alkyl group is an alkyl chain consisting essentially of 6 to 8 carbon atoms.

2. The liquid crystal device according to claim 1 , wherein a pretilt angle of the alignment film is set to 3° or more from the normal line direction.

3. The liquid crystal device according to claim 1 , wherein organic alignment layer having the alkyl group and the Si atom has the following formula:
C n H 2n+1 —Si, where n is 6 to 8.

4. A liquid crystal device comprising:
a substrate;
an alignment film which is formed on one side of the substrate;
an inorganic alignment layer having a plurality of columnar structures in which crystals grow in an oblique direction with respect to a normal line of the substrate, the inorganic alignment layer having an SiO or an SiO 2 material; and
an organic alignment layer on a surface of the inorganic alignment layer having an alkyl group and Si atom that is separate and apart from the Si of the SiO or SiO 2 material, the Si atom that is separate and apart being directly bonded to oxygen of the SiO or SiO 2 material of the inorganic alignment layer, and the Si atom that is separate and apart is directly bonding the alkyl group to the SiO or SiO 2 material of the inorganic alignment layer,
wherein the alkyl group is an alkyl chain consisting essentially of 8 carbon atoms.

5. The liquid crystal device according to claim 4 , wherein a pretilt angle of the alignment film is set to 3° or more from the normal line direction.

Assignees

• Seiko Epson Corp

Inventors

• Zhang Huiping
• Nakata Hideo
• Seki Shinsuke
• Tanaka Takao

Classifications

• C09K17/38

  Siloxanes · CPC title

• C09K17/36

  Compounds having one or more carbon-to-silicon linkages · CPC title

• C23C14/10

  Glass or silica · CPC title

• G02F1/133711 Primary

  by organic films, e.g. polymeric films · CPC title

• G02F2001/133749

  Physics · mapped topic