Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10446779-B2
Application number	US-201815974814-A
Country	US
Kind code	B2
Filing date	May 9, 2018
Priority date	Sep 8, 2017
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A display device includes: a substrate including a display area at which an image is displayed with light and a pad region at which the image is not displayed; a plurality of pads through which a signal is applied to the display area, the pads disposed in the pad region; a first insulating layer disposed between adjacent pads among the plurality of pads, in which a first opening is defined which exposes a respective pad among the adjacent pads; a second insulating layer disposed in the first opening of the first insulating layer, in which a second opening is defined which exposes the respective pad exposed by the first opening of the first insulating layer; and silver particles disposed in the first opening, between the first insulating layer and the second insulating layer.

First claim

What is claimed is:

1. A display device comprising:
a substrate including a display area at which an image is displayed with light and a pad region at which the image is not displayed;
a plurality of pads through which a signal is applied to the display area, the pads disposed in the pad region;
a first insulating layer disposed between adjacent pads among the plurality of pads, in which a first opening is defined which exposes a respective pad among the adjacent pads;
a second insulating layer disposed in the first opening of the first insulating layer, in which a second opening is defined which exposes the respective pad exposed by the first opening of the first insulating layer; and
silver particles disposed in the first opening, between the first insulating layer and the second insulating layer.

2. The display device of claim 1 , wherein the silver particles disposed in the first opening are positioned at an interface between the respective pad and the first insulating layer and are covered with the second insulating layer.

3. The display device of claim 1 , wherein the pads include a material having a degree of ionization lower than that of silver.

4. The display device of claim 1 , wherein the second insulating layer includes an organic layer or an inorganic layer.

5. The display device of claim 4 , wherein the second insulating layer includes polyimide.

6. The display device of claim 1 , wherein
the display area includes:
a thin film transistor including a gate line, a data line and a semiconductor; and
a first electrode connected with the thin film transistor, and

the pads in the pad area include a same material as that of the data line in the display area.

7. The display device of claim 6 , wherein the pads include aluminum.

8. The display device of claim 7 , wherein the pads have a triple-layer structure of titanium/aluminum/titanium.

9. The display device of claim 6 , wherein the first electrode includes silver.

10. The display device of claim 9 , wherein the first electrode has a triple-layer structure of indium tin oxide/silver/indium tin oxide.

11. The display device of claim 6 , wherein
the display area further includes an interlayer insulating layer disposed between the thin film transistor and the first electrode, and
the interlayer insulating layer in the display area includes a same material as that of the first insulating layer between the adjacent pads in the pad region.

12. The display device of claim 1 , wherein a dimension of the silver particles in the first opening of the first insulating layer is in a range of about 0.1 micrometer to about 1 micrometer.

13. The display device of claim 1 , wherein a thickness of the second insulating layer in the first opening of the first insulating layer is in a range of about 1 micrometer to about 3 micrometers.

14. The display device of claim 1 , wherein the second insulating layer in the first opening of the first insulating layer contacts a side surface and a top surface of the first insulating layer at the first opening thereof.

15. The display device of claim 1 , wherein a width of the second opening of the second insulating layer is in a range of about 5 micrometers to about 15 micrometers.

16. A display device comprising:
a substrate including a display area at which an image is displayed with light and a pad region at which the image is not displayed;
a pad through which a signal is applied to the display area, the pad disposed in the pad region;
a first insulating layer disposed on the pad, in which a first opening is defined which exposes the pad;
a second insulating layer disposed in the first opening of the first insulating layer, in which a second opening is defined which exposes the pad exposed by the first opening of the first insulating layer; and
silver particles disposed in the first opening, at an interface between the first insulating layer and the pad, the silver particles covered by the second insulating layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jun Hee
• Bae In Jun
• Chu Seong Baik

Classifications

• H10W72/952

  comprising metals or metalloids, e.g. PbSn, Ag or Cu · CPC title

• H10W72/923

  Bond pads having multiple stacked layers · CPC title

• H10W72/90

  Bond pads, in general · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G02F2201/123

  pixel · CPC title