# US 2014/0191202 A1 · Oled micro-cavity structure and method of making

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0191202 A1
- Document ID: US20140191202A1
- Status: Published application
- Kind: A1
- Application number: 13/860,282
- Filed: 2013-04-10
- Published: 2014-07-10
- Earliest claimed: 2013-01-04
- Assignees: LG Display Co., Ltd.
- Inventors: Sungbin SHIM; Se June KIM
- Web page: https://patentgrep.com/patent/US20140191202A1

## CPC

- H10K 59/351: {comprising more than three subpixels, e.g. red-green-blue-white [RGBW]}
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair}
- H10K 59/1201: {Manufacture or treatment}
- H10K 59/30: Devices specially adapted for multicolour light emission
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/80515: {characterised by their shape}
- H10K 59/80517: {Multilayers, e.g. transparent multilayers}
- H10K 59/80518: {Reflective anodes, e.g. ITO combined with thick metallic layers}
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

An organic light emitting diode, including: a substrate; a first cavity electrode in a first micro-cavity region of the substrate; a first transparent electrode of a first thickness in the first micro-cavity region, the first transparent electrode overlaps beyond a first side of the first cavity electrode; a first emissive layer in electrical connection with the first transparent electrode; and a cathode layer on the first emissive layer.

## Claims

### Claim 1

An organic light emitting diode, comprising:
a substrate;
a first cavity electrode in a first micro-cavity region of the substrate;
a first transparent electrode of a first thickness in the first micro-cavity region, the first transparent electrode overlaps beyond a first side of the first cavity electrode;
a first emissive layer in electrical connection with the first transparent electrode; and
a cathode layer on the first emissive layer.

### Claim 2 (depends on 1)

The organic light emitting diode according to claim 1, wherein the first transparent electrode overlaps beyond a second side of the first cavity electrode that is opposite to the first side.

### Claim 3 (depends on 1)

The organic light emitting diode of claim 1, wherein the cathode layer is reflective.

### Claim 4 (depends on 1)

The organic light emitting diode of claim 1, wherein the cathode layer is semi-transmissive.

### Claim 5 (depends on 1)

The organic light emitting diode of claim 1, wherein the first cavity electrode is reflective.

### Claim 6 (depends on 1)

The organic light emitting diode of claim 1, wherein the first cavity electrode is semi-transmissive.

### Claim 7 (depends on 1)

The organic light emitting diode according to claim 1, further comprising:
a second cavity electrode in a second micro-cavity region of the substrate;
a third cavity electrode in a third micro-cavity region of the substrate;
a second transparent electrode of a second thickness in the second micro-cavity region, the second transparent layer overlaps beyond a third side of the second cavity electrode;
a third transparent electrode of a third thickness in the third micro-cavity region, the third transparent layer overlaps beyond a fourth side of the third cavity electrode;
a second emissive layer in electrical connection with the second transparent electrode of the second micro-cavity region; and
a third emissive layer in electrical connection with a third transparent electrode of the third micro-cavity region, wherein the cathode layer is on the second and third emissive layers.

### Claim 8 (depends on 7)

The organic light emitting diode of claim 7, wherein the cathode layer comprises a first cathode layer in the first micro-cavity region, a second cathode layer in the second micro-cavity region, a third cathode layer in the third micro-cavity region.

### Claim 9 (depends on 7)

The organic light emitting diode of claim 7, wherein the second thickness is less than the first thickness.

### Claim 10 (depends on 9)

The organic light emitting diode of claim 9, wherein the third thickness is less than the second thickness.

### Claim 11 (depends on 9)

The organic light emitting diode of claim 9, wherein the second and third cavity electrodes are reflective.

### Claim 12 (depends on 9)

The organic light emitting diode of claim 9, wherein the second and third cavity electrodes are semi-transmissive

### Claim 13 (depends on 7)

The organic light emitting diode of claim 7, wherein the first, second and third emissive layers emit a same color.

### Claim 14

An organic light emitting diode on a substrate, comprising:
a first cavity electrode having a first width in a first sub-pixel region of the substrate;
a first transparent electrode having a second width and positioned on the first cavity electrode, wherein the second width is larger than the first width;
a first emissive layer in electrical connection with the first transparent electrode; and
a cathode layer on the first emissive layer.

### Claim 15 (depends on 14)

The organic light emitting diode according to claim 14, wherein the first transparent electrode overlaps beyond both a first side of the first cavity electrode and a second side of the first cavity electrode opposite to the first side.

### Claim 16 (depends on 15)

The organic light emitting diode of claim 15, wherein the first cavity electrode is reflective.

### Claim 17 (depends on 15)

The organic light emitting diode of claim 15, wherein the first cavity electrode is semi-transmissive.

### Claim 18 (depends on 15)

The organic light emitting diode of claim 15, wherein the cathode layer electrode is reflective.

### Claim 19 (depends on 15)

The organic light emitting diode of claim 15, wherein the cathode layer electrode is semi-transmissive.

### Claim 20

An organic light emitting diode, comprising:
a substrate;
an first sub-pixel region, a second sub-pixel region, and a third sub-pixel region on the substrate;
a first cavity electrode in the first sub-pixel region of the substrate;
a second cavity electrode in the second sub-pixel region of the substrate;
a third cavity electrode in the third sub-pixel region of the substrate;
a first transparent electrode of a first thickness in the first sub-pixel region, the first transparent electrode overlaps beyond a side of the first cavity electrode;
second transparent electrodes of a second thickness in the first sub-pixel and second sub-pixel regions, the second transparent electrode in the second sub-pixel region overlaps beyond a side of the second cavity electrode;
third transparent electrodes of a third thickness in the first sub-pixel, second sub-pixel, third sub-pixel regions, the third transparent electrode in the third sub-pixel region overlaps beyond a side of the third cavity electrode;
an emissive layer being in electrical connection with the first, second and third transparent electrodes; and
a cathode layer on the emissive layer.

### Claim 21 (depends on 20)

The organic light emitting diode of claim 20, wherein the first sub-pixel region is Red sub-pixel region, the second sub-pixel region is Green sub-pixel region, and the third sub-pixel region is Blue sub-pixel region.

### Claim 22 (depends on 20)

The organic light emitting diode of claim 20, wherein the first, second, and third cavity electrodes are reflective.

### Claim 23 (depends on 20)

The organic light emitting diode of claim 20, wherein the first, second, and third cavity electrodes are semi-transmissive.

### Claim 24 (depends on 20)

The organic light emitting diode of claim 20, wherein the cathode layer on the emissive layer is reflective.

### Claim 25 (depends on 24)

The organic light emitting diode of claim 24, wherein the cathode layer on the emissive layer is semi-transmissive.

### Claim 26 (depends on 20)

The organic light emitting diode of claim 20, further comprising:
a fourth sub-pixel region on the substrate;
a fourth cavity electrode in the fourth sub-pixel region of the substrate; and
a fourth transparent electrode of a fourth thickness in the fourth sub-pixel region, the fourth transparent electrode overlaps beyond a side of the fourth cavity electrode, wherein the emissive layer is in electrical connection with the fourth transparent electrode.

### Claim 27 (depends on 26)

The organic light emitting diode of claim 26, the fourth sub-pixel region is white sub-pixel region.

### Claim 28 (depends on 26)

The organic light emitting diode of claim 26, the fourth thickness is same as one of the first thickness, the second thickness and the third thickness

### Claim 29

A method of making an organic light emitting diode on a substrate, comprising:
forming a cavity electrode layer across first, second and third micro-cavity regions of the substrate;
forming a first transparent layer of a first thickness in the first micro-cavity region;
forming second transparent layers of a second thickness in the first and second micro-cavity regions;
forming third transparent layers of a third thickness in the first, second and third micro-cavity regions;
etching the cavity electrode layer such that the first transparent layer in the first micro-cavity region overlaps beyond a first side of a first cavity electrode, the second transparent layer in the second micro-cavity region overlaps beyond a second side of a second cavity electrode, and the third transparent layer in the third micro-cavity region overlaps beyond a third side of a third cavity electrode;
forming a first bank between the first and second micro-cavity regions and a second bank between the second and third micro-cavity regions;
forming a first emissive layer in electrical connection with the third transparent layer of the first micro-cavity region;
forming a second emissive layer in electrical connection with the third transparent layer of the second micro-cavity region;
forming a third emissive layer in electrical connection with the third transparent layer of the third micro-cavity region; and
forming a cathode layer on the first, second and third emissive layers.

### Claim 30 (depends on 29)

The method of claim 29, wherein the first, second and third emissive layers are formed at the same time for a same color.

### Claim 31

A method of making an organic light emitting diode on a substrate, comprising:
forming a cavity electrode layer across first, second and third micro-cavity regions of the substrate;
forming first transparent layers of a first thickness in the first, second and third micro-cavity region;
forming second transparent layers of a second thickness in the first and second micro-cavity regions;
forming a third transparent layer of a third thickness in the first micro-cavity regions;
etching the cavity electrode layer such that the first transparent layer in the first micro-cavity region overlaps beyond a first side of a first cavity electrode, the first transparent layer in the second micro-cavity region overlaps beyond a second side of a second cavity electrode, and the first transparent layer in the third micro-cavity region overlaps beyond a third side of a third cavity electrode;
forming a first bank between the first and second micro-cavity regions and a second bank between the second and third micro-cavity regions;
forming a first emissive layer in electrical connection with the third transparent layer of the first micro-cavity region;
forming a second emissive layer in electrical connection with the second transparent layer of the second micro-cavity region;
forming a third emissive layer in electrical connection with the first transparent layer of the third micro-cavity region; and
forming a cathode layer on the first, second and third emissive layers.

### Claim 32 (depends on 31)

The method of claim 31, wherein the first, second and third emissive layers are formed at the same time for a same color.