# US 9,437,665 B2 · Organic light-emitting display apparatus

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- Number: US 9,437,665 B2
- Document ID: US9437665B2
- Status: Granted
- Kind: B2
- Application number: 14/243,772
- Filed: 2014-04-02
- Published: 2015-03-05
- Granted: 2016-09-06
- Earliest claimed: 2013-08-28
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Joo-Sun Yoon
- Web page: https://patentgrep.com/patent/US9437665B2

## CPC

- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/1201: {Manufacture or treatment}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

Disclosed is an organic light-emitting display apparatus. The organic light-emitting display apparatus includes a pixel electrode that is connected to at least one thin film transistor, an opposite electrode that is disposed to face the pixel electrode, an organic light emitting layer that is disposed between the pixel electrode and the opposite electrode, and a pad electrode that includes a first pad layer, a second pad layer disposed on the first pad layer, and a third pad layer which is disposed between the first pad layer and the second pad layer and contains a material having a reducibility that is lower than a reducibility of a material contained in the second pad layer.

## Claims

### Claim 1

An organic light-emitting display apparatus comprising:
a pixel electrode that is connected to at least one thin film transistor;
an opposite electrode that is disposed to face the pixel electrode;
an organic light emitting layer that is disposed between the pixel electrode and the opposite electrode; and
a pad electrode that comprises a first pad layer, a second pad layer disposed on the first pad layer, and a third pad layer which is disposed between the first pad layer and the second pad layer and contains a material having a reducibility that is lower than a reducibility of a material contained in the second pad layer,
wherein the pad electrode further comprises a fourth pad layer that contains a transparent conductive oxide and is disposed between the first pad layer and the third pad layer, and
wherein the pad electrode further comprises a fifth pad layer that contains a transparent conductive oxide and is disposed on the second pad layer.

### Claim 2 (depends on 1)

The organic light-emitting display apparatus of claim 1, wherein the second pad layer contains a reflective material.

### Claim 3 (depends on 2)

The organic light-emitting display apparatus of claim 2, wherein the second pad layer contains silver (Ag).

### Claim 4 (depends on 1)

The organic light-emitting display apparatus of claim 1, wherein the first pad layer contains copper.

### Claim 5 (depends on 1)

The organic light-emitting display apparatus of claim 1, wherein the pixel electrode comprises a first layer that contains a same material as the second pad layer.

### Claim 6 (depends on 5)

The organic light-emitting display apparatus of claim 5, wherein the pixel electrode comprises a second layer that contains a same material as the third pad layer.

### Claim 7 (depends on 1)

The organic light-emitting display apparatus of claim 1, further comprising an insulating layer that covers edges of each of the second pad layer and the third pad layer.