# US 9,519,192 B2 · Array substrate, flat display panel and manufacturing method for the same

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- Number: US 9,519,192 B2
- Document ID: US9519192B2
- Status: Granted
- Kind: B2
- Application number: 14/647,803
- Filed: 2015-04-16
- Published: 2016-10-06
- Granted: 2016-12-13
- Earliest claimed: 2015-03-31
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Peng Du
- Web page: https://patentgrep.com/patent/US9519192B2

## CPC

- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/133345: {Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence)}
- G02F 1/133514: {Colour filters}
- H10D 86/0231: {using masks, e.g. half-tone masks}
- G02F 1/133357: {Planarisation layers}
- G02F 1/134372: {for fringe field switching [FFS] where the common electrode is not patterned}
- 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
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

The present invention provides an array substrate, a flat display panel and a manufacturing for the same. The array substrate includes a substrate, a common electrode disposed on the substrate, an insulation layer disposed on the common electrode, wherein, the insulation layer includes multiple first regions and multiple second regions, and the first regions and the second regions are disposed alternately, and multiple pixel electrodes respectively disposed on the first regions of the insulation layer. Wherein, a thickness of the first regions and a thickness of the second regions are different. Through above way, the electric field strength between pixel electrodes and the electric field strength above the pixel electrodes can be adjusted in order to increase the display quality of the flat display panel.

## Claims

### Claim 1

An array substrate, comprising:
a substrate;
a common electrode disposed on the substrate;
an insulation layer disposed on the common electrode, wherein, the insulation layer includes multiple first regions and multiple second regions, and the first regions and the second regions are disposed alternately; and
multiple pixel electrodes respectively disposed on the first regions of the insulation layer;
wherein, a thickness of the first regions and a thickness of the second regions are different; and
wherein, a bottom of the first region and a bottom of the second region are coplanar, and a top of the second region is higher than the bottom of the first region.

### Claim 2 (depends on 1)

The array substrate according to claim 1, wherein, the thickness of the first regions is greater than the thickness of the second regions.

### Claim 3 (depends on 2)

The array substrate according to claim 2, wherein, a difference of the thickness of the first regions and the thickness of the second regions is set to maintain a difference of an electric field strength between pixel electrodes and an electric field strength above the pixel electrodes in a predetermined range.

### Claim 4 (depends on 3)

The array substrate according to claim 3, wherein, a difference of the thickness of the first regions and the thickness of the second regions is set to make a difference of an electric field strength between pixel electrodes and an electric field strength above the pixel electrodes be zero.

### Claim 5 (depends on 1)

The array substrate according to claim 1, wherein, the common electrode and the pixel electrodes are made by a transparent and conductive material.

### Claim 6

A flat display panel, comprising:
a color filter substrate;
an array substrate disposed oppositely to the color filter substrate; and
a liquid crystal layer disposed between the color filter substrate and the array substrate;
wherein, the array substrate includes:
a substrate;
a common electrode disposed on the substrate;
an insulation layer disposed on the common electrode, wherein, the insulation layer includes multiple first regions and multiple second regions, and the first regions and the second regions are disposed alternately; and
multiple pixel electrodes respectively disposed on the first regions of the insulation layer;
wherein, a thickness of the first regions and a thickness of the second regions are different; and
wherein, a bottom of the first region and a bottom of the second region are coplanar, and a top of the second region is higher than the bottom of the first region.

### Claim 7 (depends on 6)

The flat display panel according to claim 6, wherein, the thickness of the first regions is greater than the thickness of the second regions.

### Claim 8 (depends on 7)

The flat display panel according to claim 7, wherein, a difference of the thickness of the first regions and the thickness of the second regions is set to maintain a difference of an electric field strength between pixel electrodes and an electric field strength above the pixel electrodes in a predetermined range.

### Claim 9

A manufacturing method for an array substrate, comprising:
sequentially forming a common electrode, an insulation layer and pixel electrode layer on a substrate;
coating a photoresist layer on the pixel electrode layer;
exposing and developing the photoresist layer in order to form a patterned photoresist layer;
utilizing the patterned photoresist layer and a first etching method to etch the pixel electrode layer in order to form multiple spaced pixel electrodes; and
utilizing the patterned photoresist layer and a second etching method to etch the insulation layer such that the insulation layer forms multiple alternate first regions and second regions, wherein, a thickness of the first regions and a thickness of the second regions are different;
wherein, a bottom of the first region and a bottom of the second region are coplanar, and a top of the second region is higher than the bottom of the first region.

### Claim 10 (depends on 9)

The manufacturing method for the array substrate according to claim 9, wherein, the first etching method is a wet etching, and the second etching method is a dry etching.