Display device, method of manufacturing the display device, and electronic device including the same

Patent metadata

Field	Value
Publication number	US-2025386689-A1
Application number	US-202519071166-A
Country	US
Kind code	A1
Filing date	Mar 5, 2025
Priority date	Jun 18, 2024
Publication date	Dec 18, 2025
Grant date	—

Abstract

A display device includes: a substrate including a display area where multiple pixels are disposed and a pad area spaced apart from the display area, a first substrate pad disposed in the pad area and forming a first inclination angle with an edge of the substrate to have an inclined shape, a substrate alignment mark disposed in the pad area and adjacent to the first substrate pad, a first alignment pattern disposed in the pad area and disposed below the first substrate pad in a plan view, and a chip-on-film attached to a side of the substrate. The chip-on-film includes a first film pad overlapping the first substrate pad in a plan view in at least a portion of the pad area and forming a second inclination angle with the edge of the substrate to have an inclined shape and a film alignment mark adjacent to the first film pad.

First claim

What is claimed is:

1 . A display device comprising:
a substrate including a display area in which a plurality of pixels are disposed and a pad area spaced apart from the display area; a first substrate pad disposed in the pad area on the substrate and forming a first inclination angle with respect to an edge of the substrate to have an inclined shape; a substrate alignment mark disposed in the pad area on the substrate and adjacent to the first substrate pad; a first alignment pattern disposed in the pad area on the substrate and disposed below the first substrate pad in a plan view; and a chip-on-film attached to a side of the substrate, the chip-on-film including: a first film pad overlapping the first substrate pad in a plan view in at least a portion of the pad area and forming a second inclination angle with respect to the edge of the substrate to have an inclined shape; and a film alignment mark adjacent to the first film pad.

2 . The display device of claim 1 , wherein the first inclination angle and the second inclination angle are substantially equal to each other.

3 . The display device of claim 1 , wherein the first alignment pattern forms a third inclination angle with respect to the edge of the substrate, and
the third inclination angle and the first inclination angle are substantially equal to each other.

4 . The display device of claim 1 , wherein the substrate alignment mark is adjacent to the first substrate pad in a first direction, and
the film alignment mark is adjacent to the first film pad in the first direction.

5 . The display device of claim 4 , wherein the first alignment pattern is adjacent to the first film pad in the first direction in a plan view.

6 . The display device of claim 5 , further comprising:
a second alignment pattern spaced apart from the first alignment pattern in a plan view with the first film pad disposed between the second alignment pattern and the first alignment pattern.

7 . The display device of claim 6 , wherein the first alignment pattern forms a third inclination angle with respect to the edge of the substrate to have an inclined shape,
the second alignment pattern forms a fourth inclination angle with respect to the edge of the substrate, and the third inclination angle and the fourth inclination angle are substantially equal to each other.

8 . The display device of claim 1 , further comprising:
a second substrate pad disposed in the pad area on the substrate, disposed adjacent to the first substrate pad, and forming a third inclination angle with respect to the edge of the substrate to have an inclined shape.

9 . The display device of claim 8 , wherein the chip-on-film further includes a second film pad overlapping the second substrate pad in a plan view in at least a portion of the pad area and forming a fourth inclination angle with respect to the edge of the substrate, and
the third inclination angle and the fourth inclination angle are substantially equal to each other.

10 . The display device of claim 9 , further comprising:
a second alignment pattern disposed in the pad area on the substrate and spaced apart from the first alignment pattern in a plan view with respect to the first film pad; a third alignment pattern disposed between the second alignment pattern and the second film pad in a plan view; and a fourth alignment pattern disposed in the pad area on the substrate and spaced apart from the third alignment pattern in a plan view with respect to the second film pad.

11 . The display device of claim 10 , wherein the third alignment pattern forms a fifth inclination angle with respect to the edge of the substrate to have an inclined shape,
the fourth alignment pattern forms a sixth inclination angle with respect to the edge of the substrate, and the fifth inclination angle and the sixth inclination angle are equal to each other.

12 . The display device of claim 1 , wherein the first alignment pattern is a portion from which at least a portion of an insulating layer disposed on the first substrate pad is removed.

13 . A method of manufacturing a display device, the method comprising:
attaching a chip-on-film to a side of a substrate including a display area in which a plurality of pixels are disposed and a pad area spaced apart from the display area; checking a substrate alignment mark disposed in the pad area on the substrate and a film alignment mark included in the chip-on-film to check whether the chip-on-film is expanded and whether the chip-on-film is contracted; adjusting position of the chip-on-film; and measuring a first separation distance between a first film pad and a first alignment pattern adjacent to the first film pad, wherein the first film pad is included in the chip-on-film and forms a first inclination angle with respect to an edge of the substrate to have an inclined shape in at least a portion of the pad area.

14 . The method of claim 13 , wherein the adjusting of the position of the chip-on-film includes moving the chip-on-film in a direction away from the substrate in case that the chip-on-film is expanded.

15 . The method of claim 13 , wherein the adjusting of the position of the chip-on-film includes moving the chip-on-film so that an area where the chip-on-film and the substrate overlap in a plan view increases in case that the chip-on-film is contracted.

16 . The method of claim 13 , further comprising:
additionally adjusting the position of the chip-on-film after measuring the first separation distance between the first film pad and the first alignment pattern.

17 . An electronic device comprising:
a substrate including a display area in which a plurality of pixels are disposed and a pad area spaced apart from the display area; a first substrate pad disposed in the pad area on the substrate and forming a first inclination angle with respect to an edge of the substrate to have an inclined shape; a substrate alignment mark disposed in the pad area on the substrate and adjacent to the first substrate pad; a first alignment pattern disposed in the pad area on the substrate and disposed below the first substrate pad in a plan view; a chip-on-film attached to a side of the substrate, the chip-on-film including: a first film pad overlapping the first substrate pad in a plan view in at least a portion of the pad area and forming a second inclination angle with respect to the edge of the substrate to have an inclined shape; and a film alignment mark adjacent to the first film pad; and memory where data information is stored.

18 . The electronic device of claim 17 , wherein the first inclination angle and the second inclination angle are substantially equal to each other.

19 . The electronic device of claim 17 , wherein the first alignment pattern forms a third inclination angle with respect to the edge of the substrate, and
the third inclination angle and the first inclination angle are substantially equal to each other.

20 . The electronic device of claim 17 , wherein the substrate alignment mark is adjacent to the first substrate pad in a first direction, and
the film alignment mark is adjacent to the first film pad in the first direction.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Sunkwang
• Ahn Si Hyun
• Lee Kyeuk
• Lee Seongyoung

Classifications

• H10W72/9445

  Top-view layouts, e.g. mirror arrays · CPC title

• H10W46/301

  for alignment · CPC title

• H10W70/65

  Shapes or dispositions of interconnections · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title