Display device, method of fabricating the same, and tiled display device

Patent metadata

Field	Value
Publication number	US-2023402436-A1
Application number	US-202318328875-A
Country	US
Kind code	A1
Filing date	Jun 5, 2023
Priority date	Jun 8, 2022
Publication date	Dec 14, 2023
Grant date	—

Abstract

A display device may include light emitting elements disposed on a first surface of a substrate, a connection electrode disposed on a second surface of the substrate, and a via layer disposed on the connection electrode, and including at least one depression. The passivation layer may be disposed in the depression of the via layer.

First claim

What is claimed is:

1 . A display device comprising:
light emitting elements disposed on a first surface of a substrate; a connection electrode disposed on a second surface of the substrate, a via layer disposed on the connection electrode, and including at least one depression; and a passivation layer disposed in the depression of the via layer.

2 . The display device according to claim 1 , wherein
the depression includes a first depressed pattern, and the first depressed pattern extends in a first direction.

3 . The display device according to claim 2 , wherein
the depression further includes a second depressed pattern, and the second depressed pattern is spaced apart from the first depressed pattern.

4 . The display device according to claim 3 , wherein
the second depressed pattern extends in the first direction.

5 . The display device according to claim 2 , wherein
the depression further includes a second depressed pattern, and the second depressed pattern extends in a second direction intersecting the first direction.

6 . The display device according to claim 5 , wherein
the depression further includes a third depressed pattern, and the third depressed pattern intersects the first depressed pattern and the second depressed pattern.

7 . The display device according to claim 1 , wherein
the passivation layer physically contacts the via layer.

8 . The display device according to claim 1 , wherein
the depression of the via layer includes a first surface, a second surface facing the first surface, and a third surface disposed between the first surface and the second surface.

9 . The display device according to claim 8 , wherein
the passivation layer physically contacts at least one of the first surface, the second surface, and the third surface of the depression of the via layer.

10 . The display device according to claim 1 , further comprising:
at least one transistor disposed on the first surface of the substrate.

11 . The display device according to claim 10 , further comprising:
electrodes that electrically connect the transistor to the light emitting elements.

12 . A method of fabricating a display device, comprising:
forming a front pattern on a first surface of a substrate; forming a rear pattern on a second surface of the substrate; forming a via layer on the rear pattern; forming at least one depression by etching the via layer; and forming a passivation film on the via layer, wherein the passivation film is provided in the depression of the via layer.

13 . The method according to claim 12 , further comprising:
forming a passivation layer on the via layer.

14 . The method according to claim 13 , wherein
the passivation layer is provided in the depression of the via layer.

15 . The method according to claim 14 , wherein
the passivation layer physically contacts the via layer.

16 . The method according to claim 15 , wherein
the passivation film physically contacts the passivation layer provided in the depression.

17 . The method according to claim 12 , wherein the forming of the depression comprises forming a first depressed pattern extending in a first direction.

18 . The method according to claim 17 , wherein the forming of the depression further comprises forming a second depressed pattern intersecting the first depressed pattern.

19 . The method according to claim 12 , wherein the forming of the passivation film comprises hardening a passivation-film material layer provided in the depression of the via layer.

20 . The method according to claim 19 , wherein the passivation-film material layer is provided by an inkjet printing operation.

21 . A tiled display device comprising:
display devices adjacent to each other; and a seam connecting the display devices to each other, wherein each of the display devices comprises:
light emitting elements disposed on a first surface of a substrate;
a connection electrode disposed on a second surface of the substrate;
a via layer disposed on the connection electrode, and including at least one depression; and
a passivation layer disposed in the depression of the via layer.

22 . The tiled display device according to claim 21 , wherein each of the light emitting elements comprises a flip-chip-type micro light emitting diode (LED).

Assignees

• Samsung Display Co Ltd

Inventors

• Hyun Jin Ho
• Kwon Oh June
• Sung Woo Yong

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/021

  of multiple TFTs · CPC title

• H10H29/142 Primary

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10H20/8312

  extending at least partially through the bodies · CPC title