# US 5,710,608 A · Method of orientation treatment of orientation film and apparatus of orientation treatment of orientation film

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,710,608 A
- Document ID: US5710608A
- Status: Granted
- Kind: A
- Application number: 08/579,359
- Filed: 1995-12-27
- Granted: 1998-01-20
- Earliest claimed: 1994-12-28
- Assignees: Nissin Electric Co., Ltd.
- Inventors: Masahiro Nakabayashi; Norio Asagi; Hajime Kuwahara; Taizou Ehara
- Web page: https://patentgrep.com/patent/US5710608A

## CPC

- G02F 1/133784: {by rubbing}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

In a method and an apparatus of orientation treatment of an orientation film according to the present invention, the surface of a orientation film formed on a substrate for orientating liquid-crystal molecules is rubbed in a predetermined direction. Thereafter ion beams are radiated onto the orientation film in a vacuum in a direction different from the rubbing direction, that is, in the direction obliquely above the orientation film surface. In the method, these steps can be reversed.

## Claims

### Claim 1

A method of orientation treatment of an orientation film of a high molecular weight organic material formed on a substrate for orientating liquid-crystal molecules, comprising the steps of:
rubbing a surface of said orientation film; and
radiating ion beams onto the rubbed surface of said orientation film in a vacuum from a direction substantially perpendicular to the surface of said orientation film.

### Claim 2 (depends on 1)

A method according to claim 1, further comprising the step of: simultaneously to said radiating step, supplying electrons to said orientation film to neutralize positive charges given by said radiating step.

### Claim 3

A method of orientation treatment of an orientation film of a high molecular weight organic material formed on a substrate for orientating liquid-crystal molecules, comprising the steps of:
radiating ion beams onto said orientation film in a vacuum from a direction substantially perpendicular to the surface of said orientation film; and
rubbing a surface of the irradiated orientation film.

### Claim 4 (depends on 3)

A method according to claim 3, further comprising the step of: simultaneously to said radiating step, supplying electrons to said orientation film to neutralize positive charges given by said radiating step.

### Claim 5

An apparatus for orientation treatment of a high molecular weight organic material orientation film formed on a substrate for orientating liquid-crystal molecules, comprising in combination:
rubbing means for rubbing a surface of said orientation film; and
radiating means for radiating ion beams onto said orientation film in a vacuum
wherein said rubbing means rubs the surface of said orientation film in a predetermined direction, and said radiating means radiates said ion beams onto said orientation film from a direction different from the direction of the rubbing by said rubbing means and from a direction substantially perpendicular to the surface of said orientation film.

### Claim 6 (depends on 5)

An apparatus according to claim 5, further comprising electron supplying means for supplying electrons to said orientation film to neutralize positive charges given by said radiating means.