WO2002057839 IMPROVING THE STABILITY OF ION BEAM GENERATED ALIGNMENT LAYERS BY SURFACE MODIFICATION

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Publication Number WO/2002/057839

Publication Date 25.07.2002

International Application No. PCT/US2001/044989

International Filing Date 30.11.2001

Chapter 2 Demand Filed 01.07.2002

IPC

CPC

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Applicants

INTERNATIONAL BUSINESS MACHINES CORPORATION [US]/[US]

Inventors

CALLEGARI, Alessandro, C.
CHAUDHARI, Praveen
DOANY, Fuad E.
DOYLE, James, P.
GALLIGAN, Eileen, A.
HOUGHAM, Gareth, G.
GLOWNIA, James, H.
LACEY, James, A.
LIEN, Shui-Chih
LU, Minhau
ROSENBLUTH, Alan, E.
YANG, Kei-Hsiung

Agents

NATHANIEL, T., WALLACE

Priority Data

09/726,951

30.11.2000

Publication Language English (en)

Filing Language English (EN)

Designated States

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Title

(EN) IMPROVING THE STABILITY OF ION BEAM GENERATED ALIGNMENT LAYERS BY SURFACE MODIFICATION

(FR) AMELIORATION DE LA STABILITE DES COUCHES D'ALIGNEMENT GENEREES PAR FAISCEAU LASER AU MOYEN D'UNE MODIFICATION DE SURFACE

Abstract

(EN) A method for preparing a alignment layer surface provides a surface on the alignment layer. A chemically modified surfae [117] is formed as a result of quenching and/or ion beam treatment in accordance with the present invention, and reactive gas is introduced to the ion beam to saturate dangling bonds on the surface. Layer [117] is now substantially free from dangling bonds and free radicals which could degrade properties of a liquid crystal display. Now, a substrate [101] is formed for use in a liquid crystal displax device. Another method for preparing an alignment layer. The surface is bombarded with ions and quenched with a reactive component to saturate dangling bonds on the surface.

(FR) Ce procédé permettant de préparer la surface d'une couche d'alignement comprend la formation d'une surface sur la couche d'alignement. Ce procédé consiste à produire une surface (117) chimiquement modifiée par trempe et/ou un traitement par faisceau ionique, et à introduire un gaz réactif conjointement au faisceau ionique afin de saturer les liaisons pendantes et les radicaux libres qui risquent de dégrader les propriétés d'un afficheur à cristaux liquides. On obtient ainsi un substrat (101) convenant pour un afficheur à cristaux liquides. Un procédé différent de préparation de surface de couche d'alignement permet également la formation d'une surface sur une couche d'alignement. Ce procédé comprend un bombardement ionique de la surface et une trempe à l'aide d'un composant réactif destinée à saturer les liaisons pendantes présentes sur la surface.

G	PHYSICS
02	OPTICS
F	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1	Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01	for the control of the intensity, phase, polarisation or colour
13	based on liquid crystals, e.g. single liquid crystal display cells
133	Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333	Constructional arrangements
1337	Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

G	PHYSICS
02	OPTICS
F	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1	Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01	for the control of the intensity, phase, polarisation or colour
13	based on liquid crystals, e.g. single liquid crystal display cells
133	Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333	Constructional arrangements
1337	Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

G	PHYSICS
02	OPTICS
F	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1	Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01	for the control of the intensity, phase, polarisation or colour
13	based on liquid crystals, e.g. single liquid crystal display cells
133	Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333	Constructional arrangements; ; Manufacturing methods
1337	Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

G	PHYSICS
02	OPTICS
F	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1	Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01	for the control of the intensity, phase, polarisation or colour
13	based on liquid crystals, e.g. single liquid crystal display cells
133	Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333	Constructional arrangements; ; Manufacturing methods
1337	Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
13378	by treatment of the surface, e.g. embossing, rubbing or light irradiation

G	PHYSICS
02	OPTICS
F	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1	Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01	for the control of the intensity, phase, polarisation or colour
13	based on liquid crystals, e.g. single liquid crystal display cells
133	Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333	Constructional arrangements; ; Manufacturing methods
1337	Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

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1. WO2002057839 - IMPROVING THE STABILITY OF ION BEAM GENERATED ALIGNMENT LAYERS BY SURFACE MODIFICATION