Display device and method of fabricating the same

• US 10,818,649 B2
• Filed: 05/17/2019
• Issued: 10/27/2020
• Est. Priority Date: 10/29/2018
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Sa, Kongtan, Kang, Sammook, Kim, Yongil
• Primary Examiner(s): Nicely, Joseph C.
• Application Number:
  US16/415,048
• Publication Number:
  US 20200135706A1
• Time in Patent Office: 529 Days
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 27/156 two-dimensional arrays

Abstract

Display devices and methods of fabricating display devices are provided. The display device includes a circuit board; a first light-emitting device array substrate mounted on the circuit board; and a second light-emitting device array substrate mounted on the circuit board adjacent the first light-emitting device array substrate in a first direction. The circuit board defines a groove that overlaps a boundary between the first light-emitting device array substrate and the second light-emitting device array substrate.

Claims

1. A display device, comprising:

a circuit board;

a first light-emitting device array substrate mounted on the circuit board; and

a second light-emitting device array substrate mounted on the circuit board adjacent the first light-emitting device array substrate in a first direction,

wherein the circuit board defines a groove that overlaps a boundary between the first light-emitting device array substrate and the second light-emitting device array substrate.

2. The display device of claim 1, further comprising a third light-emitting device array substrate mounted on the circuit board adjacent the second light-emitting device array substrate in a second direction, wherein the second direction intersects the first direction;

and

a fourth light-emitting device array substrate mounted on the circuit board adjacent the first light-emitting device array substrate in the second direction,

wherein the groove has a cross shape when viewed in plan.

3. The display device of claim 1, wherein a width of the groove varies.

4. The display device of claim 1, wherein the circuit board comprises a plurality of first circuit alignment keys and a plurality of second circuit alignment keys, and

wherein the plurality of first circuit alignment keys and the plurality of second circuit alignment keys are disposed along a perimeter of the circuit board.

5. The display device of claim 4, wherein one of the plurality of first circuit alignment keys and one of the plurality of second circuit alignment keys are adjacent to each other and are disposed close to a center of a lateral side of the circuit board.

6. The display device of claim 1, wherein the first light-emitting device array substrate comprises:

a plurality of light-emitting stacks spaced apart from each other in the first direction; and

an isolation dielectric pattern interposed between each of the plurality of light-emitting stacks,

wherein the isolation dielectric pattern comprises a recession.

7. The display device of claim 1, wherein the circuit board comprises a base layer and an interlayer dielectric layer covering the base layer, and

wherein the groove is provided in the interlayer dielectric layer.

8. The display device of claim 1, further comprising a non-conductive layer interposed between the circuit board and each of the first light-emitting device array substrate and the second light-emitting device array substrate, and

wherein the non-conductive layer is provided within the groove.

9. A display device, comprising:

a base substrate;

a first substrate mounted on the base substrate; and

a second substrate mounted on the base substrate, wherein the first substrate and the second substrate are linearly disposed along a first direction,

wherein the base substrate defines a groove that overlaps a boundary between the first substrate and the second substrate.

10. The display device of claim 9, further comprising:

a third substrate mounted on the base substrate; and

a fourth substrate mounted on the base substrate,

wherein the first substrate, the second substrate, the third substrate and the fourth substrate are sequentially arranged on the base substrate alone a clockwise direction, and

wherein the groove has a cross shape when viewed in plan.

11. The display device of claim 9, wherein a width of the groove varies.

12. The display device of claim 9, wherein the base substrate comprises a plurality of first alignment keys and a plurality of second alignment keys,

wherein the plurality of first alignment keys and the plurality of second alignment keys are disposed along a perimeter of the base substrate.

13. The display device of claim 12, wherein first shapes of the plurality of first alignment keys are different from second shapes of the plurality of second alignment keys.

14. The display device of claim 12, wherein one of the plurality of first alignment keys and one of the plurality of second alignment keys are adjacent to each other and are disposed close to a center of a lateral side of the base substrate.

15. The display device of claim 9, wherein the base substrate comprises a base layer and an interlayer dielectric layer that covers the base layer, and

wherein the groove is provided in the interlayer dielectric layer.

16. The display device of claim 9, further comprising a non-conductive layer interposed between the base substrate and each of the first substrate and the second substrate, and

wherein the non-conductive layer is provided within the groove.

17. A display device, comprising:

a circuit board;

a first light-emitting device array substrate that is flip-chip mounted on the circuit board;

a second light-emitting device array substrate that is flip-chip mounted on the circuit board, wherein the first light-emitting device array substrate and the second light-emitting device array substrate are linearly disposed along a first direction; and

a non-conductive layer interposed between the circuit board and each of the first light-emitting device array substrate and the second light-emitting device array substrate,

wherein the circuit board defines a groove that overlaps a boundary between the first light-emitting device array substrate and the second light-emitting device array substrate, and

wherein the non-conductive layer is provided within the groove.

18. The display device of claim 17, further comprising:

a third light-emitting device array substrate mounted on the circuit board; and

a fourth light-emitting device array substrate mounted on the circuit board,

wherein the third light-emitting device array substrate and the fourth light-emitting device array substrate are linearly disposed along the first direction,

wherein the third light-emitting device array substrate is adjacent to the second light-emitting device array substrate along a second direction, wherein the second direction intersects the first direction,

wherein the fourth light-emitting device array substrate is adjacent to the first light-emitting device array substrate along the second direction, and

wherein the groove has a cross shape when viewed in plan.

19. The display device of claim 17, wherein a width of the groove varies.

20. The display device of claim 17, wherein the circuit board comprises a plurality of first circuit alignment keys and a plurality of second circuit alignment keys,

wherein the plurality of first circuit alignment keys and the plurality of second circuit alignment keys disposed along a perimeter of the circuit board.