# US 2025/0098488 A1 · Display device and method of manufacturing the same

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- Number: US 2025/0098488 A1
- Document ID: US20250098488A1
- Status: Published application
- Kind: A1
- Application number: 18/769,809
- Filed: 2024-07-11
- Published: 2025-03-20
- Earliest claimed: 2023-09-19
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: JUNG-WOO LEE; WOOYOUNG KIM
- Web page: https://patentgrep.com/patent/US20250098488A1

## CPC

- H10K 59/873: {Encapsulations}
- H10K 59/1201: {Manufacture or treatment}
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display panel includes a light-emitting element disposed on a base substrate and including a light-emitting layer, an inorganic deposition layer disposed on the light-emitting element, and an encapsulation layer disposed on the inorganic deposition layer. The inorganic deposition layer includes a first portion including a first upper surface inclined at a first angle with respect to an upper surface of the base substrate, and a second portion including a second upper surface substantially parallel to the upper surface of the base substrate. A first thickness of the first portion is greater than a second thickness of the second portion. Accordingly, external light reflection may be reduced, and a layer uniformity may be improved, and thus the display device may have improved display efficiency.

## Claims

### Claim 1

A display device comprising a display panel, the display panel including:
a light-emitting element disposed on a base substrate and including a light-emitting layer;
an inorganic deposition layer disposed on the light-emitting element; and
an encapsulation layer disposed on the inorganic deposition layer, wherein
the inorganic deposition layer includes:
a first portion including a first upper surface inclined at a first angle with respect to an upper surface of the base substrate; and
a second portion including a second upper surface substantially parallel to the upper surface of the base substrate, and
a first thickness of the first portion is greater than a second thickness of the second portion.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the first angle is in a range of about 60 degrees to about 90 degrees.

### Claim 3 (depends on 1)

The display device of claim 1, wherein a surface roughness of the first upper surface is smaller than a surface roughness of the second upper surface.

### Claim 4 (depends on 1)

The display device of claim 1, wherein an irregular pattern is defined on the second upper surface.

### Claim 5 (depends on 1)

The display device of claim 1, wherein
the display panel further comprises:
a pixel-defining film disposed on the base substrate and having a pixel opening, and
the light-emitting layer is disposed in the pixel opening.

### Claim 6 (depends on 5)

The display device of claim 5, wherein
the pixel-defining film comprises a side surface defining the pixel opening,
the side surface of the pixel-defining film is inclined at a second angle with respect to the upper surface of the base substrate, and
the second angle is substantially the same as the first angle.

### Claim 7 (depends on 1)

The display device of claim 1, wherein the inorganic deposition layer comprises an inorganic material having a refractive index of about 1.0 or greater and a light absorption coefficient of about 0.5 or greater.

### Claim 8 (depends on 1)

The display device of claim 1, wherein the inorganic deposition layer comprises at least one selected from the group consisting of bismuth (Bi) and ytterbium (Yb).

### Claim 9 (depends on 1)

The display device of claim 1, wherein a difference between the first thickness and the second thickness is in a range of about 5 Å to about 50 Å.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the first thickness is in a range of about 50 Å to about 200 Å.

### Claim 11 (depends on 1)

The display device of claim 1, wherein the second thickness is in a range of about 40 Å to about 100 Å.

### Claim 12 (depends on 1)

The display device of claim 1, wherein the encapsulation layer is entirely in contact with the first upper surface and the second upper surface.

### Claim 13 (depends on 1)

The display device of claim 1, wherein
the light-emitting element further comprises:
a first electrode disposed on the base substrate;
a second electrode spaced apart from the first electrode;
a hole transport region disposed between the first electrode and the light-emitting layer;
an electron transport region disposed between the second electrode and the light-emitting layer; and
a capping layer disposed on the second electrode,
the light-emitting layer is disposed between the first electrode and the second electrode, and
the inorganic deposition layer is directly disposed on the capping layer.

### Claim 14 (depends on 1)

The display device of claim 1, further comprising:
a light control layer disposed on the display panel and including at least one of a dye and a pigment; and
a sensor layer disposed between the display panel and the light control layer.

### Claim 15

A display device, comprising:
a display panel; and
a light control layer disposed on the display panel and including at least one of a dye and a pigment, wherein
the display panel includes:
a light-emitting element disposed on a base substrate and including a light-emitting layer;
an inorganic deposition layer disposed on the light-emitting element and including:
a partition portion; and
a flat portion adjacent to the partition portion; and
an encapsulation layer being entirely in contact with a first upper surface of the partition portion and a second upper surface of the flat portion,
the first upper surface is inclined at a first angle with respect to an upper surface of the base substrate,
the second upper surface is substantially parallel to the upper surface of the base substrate, and
a surface roughness of the first upper surface is smaller than a surface roughness of the second upper surface.

### Claim 16

A method of manufacturing a display device, the method comprising:
providing a base substrate and a light-emitting element including a light-emitting layer disposed on the base substrate;
forming, on the light-emitting element, an inorganic deposition layer including an inorganic material; and
forming an encapsulation layer on the inorganic deposition layer, wherein
the forming of the inorganic deposition layer includes:
forming a preliminary inorganic deposition layer including:
a first preliminary portion including a first preliminary upper surface having a first angle with respect to an upper surface of the base substrate; and
a second preliminary portion including a second preliminary upper surface substantially parallel to the upper surface of the base substrate, and
forming an irregular pattern by etching at least a portion of the second preliminary upper surface.

### Claim 17 (depends on 16)

The method of claim 16, wherein the first angle is in a range of about 60 degrees to about 90 degrees.

### Claim 18 (depends on 16)

The method of claim 16, wherein the forming of the preliminary inorganic deposition layer comprises performing a thermal evaporation process.

### Claim 19 (depends on 16)

The method of claim 16, wherein the forming of the irregular pattern comprises performing any one among a wet etching process, a dry etching process, and an ion milling process.

### Claim 20 (depends on 16)

The method of claim 16, wherein a thickness of the first preliminary portion and a thickness of the second preliminary portion are substantially the same.