# US 9,520,417 B2 · Method of manufacturing alignment film

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- Number: US 9,520,417 B2
- Document ID: US9520417B2
- Status: Granted
- Kind: B2
- Application number: 14/417,661
- Filed: 2014-08-13
- Published: 2016-02-11
- Granted: 2016-12-13
- Earliest claimed: 2014-08-07
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Guo Zhao; Yu-wu Huang
- Web page: https://patentgrep.com/patent/US9520417B2

## CPC

- H10D 86/0212: {comprising manufacture, treatment or coating of substrates}
- G02F 1/133351: {Manufacturing of individual cells out of a plurality of cells, e.g. by dicing}
- G02F 1/133711: {by organic films, e.g. polymeric films}
- G02F 1/133388: {with constructional differences between the display region and the peripheral region}
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- 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

A method of manufacturing an alignment film is provided, and has steps of determining printing regions for an alignment agent, which including display portions and transfer portions; printing the alignment agent within the printing regions to form an alignment thin layer; and performing an alignment process to the alignment thin layer to form the alignment film. The unevenness on the edge of the alignment film is moved away from the display portions by expanding the printing regions for the alignment agent, so as to promote the imaging quality of the finished LCD.

## Claims

### Claim 1

A method of manufacturing an alignment film, comprising steps of:
determining printing regions for an alignment agent, wherein the printing regions include display portions and transfer portions respectively on an array substrate and a color filter substrate;
printing the alignment agent within the printing regions to form an alignment thin layer;
after the alignment thin layer is formed, applying a stripping agent within the transfer portions, wherein the stripping agent is used for dissolving the alignment thin layer covered on the transfer portions;
after the alignment thin layer covered on the transfer portions is dissolved, cleaning the transfer portions for removing the stripping agent and impurities generated during dissolving the alignment thin layer; and
after cleaning the transfer portions, performing an alignment process to the alignment thin layer to form the alignment film.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising steps of:
disposing gold balls at predetermined positions of the transfer portions on the array substrate or the color filter substrate; and
compressing the array substrate and the color filter substrate to conduct transparent electrode layers thereof with the gold balls passing through the alignment film.

### Claim 3 (depends on 1)

The method according to claim 1, wherein
after the step of forming the alignment film, further comprising steps of:
disposing gold balls at predetermined positions of the transfer portions; and
compressing the array substrate and the color filter substrate to conduct transparent electrode layers thereof with the gold balls.

### Claim 4 (depends on 2)

The method according to claim 2, further comprising a step of:
forming a transparent electrode layer having a ring shape on the transfer portions when preparing the array substrate,
wherein the predetermined positions are the transparent electrode layer having the gold balls disposed thereon.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the step of disposing the gold balls on the transparent electrode layer comprises steps of:
mixing the gold balls and a sealant; and
applying the sealant mixed with the gold balls onto the transparent electrode layer.

### Claim 6

A method of manufacturing an alignment film, comprising steps of:
determining printing regions for an alignment agent, wherein the printing regions are located on surfaces an array substrate and a color filter substrate for combining with each other;
printing the alignment agent within the printing regions;
pre-curing the alignment agent to form an alignment thin layer;
after the alignment thin layer is formed, applying a stripping agent within the printing regions except on display portions to carry out a stripping process, wherein the stripping agent is used for dissolving the alignment thin layer covered on the transfer portions;
after the alignment thin layer covered on the transfer portions is dissolved, removing impurities generated by the stripping process with a cleaning process to form the alignment thin layer of the display portions;
after the cleaning process, curing the alignment thin layer; and
performing an alignment process to the alignment thin layer to form the alignment film.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the alignment process is rubbing alignment, UV irradiation alignment, or lithographic printing alignment.

### Claim 8 (depends on 6)

The method according to claim 6, wherein the alignment process is performed with a homogeneous parallel alignment, a homogeneous vertical alignment, a tilt alignment, or a hybrid alignment.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the alignment film has a thickness ranged from 0.05 μm to 0.1 μm.