# US 2014/0151653 A1 · Organic light emitting display and manufacturing method thereof

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- Number: US 2014/0151653 A1
- Document ID: US20140151653A1
- Status: Published application
- Kind: A1
- Application number: 14/029,246
- Filed: 2013-09-17
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Woong sik KIM
- Web page: https://patentgrep.com/patent/US20140151653A1

## CPC

- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/87: {Passivation; Containers; Encapsulations}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An organic light emitting display includes a substrate, a thin film transistor disposed on the substrate, an overcoat layer having a first thru-hole formed therethrough to expose a portion of the thin film transistor and inclined at an angle with respect to the substrate, an upper passivation layer disposed on the overcoat layer and having a second thru-hole formed threrethrough to expose the portion of the thin film transistor, a first electrode connected to the thin film transistor through the second thru-hole, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer.

## Claims

### Claim 1

A method of manufacturing an organic light emitting display, comprising the steps of:
forming a thin film transistor on a substrate;
forming an overcoat layer on the thin film transistor to including a first thru-hole formed therethrough to expose a portion of the thin film transistor, the first thru-hole having a surface inclined at an angle not greater than about 60 degrees with respect to an upper surface of the substrate;
forming an upper passivation layer on the overcoat layer including a second thru-hole formed therethrough to expose the portion of the thin film transistor;
forming a first electrode on the upper passivation layer so as to be connected to the thin film transistor;
forming an organic light emitting layer on the first electrode; and
forming a second electrode on the organic light emitting layer.

### Claim 2 (depends on 1)

The method of claim 1, the forming of the overcoat layer comprising:
forming the overcoat layer on the thin film transistor;
exposing and developing the overcoat layer using a mask having at least two areas with different transmittance to form the first thru-hole; and
curing the overcoat layer.

### Claim 3 (depends on 2)

The method of claim 2, the mask comprising a first area that transmits a light, a second area that partially transmits and partially blocks the light, and a third area that blocks the light, the second area corresponding to the inclined surface of the overcoat layer.

### Claim 4 (depends on 3)

The method of claim 3, the mask comprising a slit mask.

### Claim 5 (depends on 3)

The method of claim 3, the mask comprising a half-tone mask.

### Claim 6 (depends on 1)

The method of claim 1, further comprising the step of forming a lower passivation layer on the thin film transistor prior to forming the overcoat layer.

### Claim 7 (depends on 6)

The method of claim 6, further comprising the step of forming a third thru-hole through the lower passivation layer to expose the portion of the thin film transistor.

### Claim 8 (depends on 7)

The method of claim 7, the third thru-hole being formed through a same process as the first thru-hole.

### Claim 9 (depends on 1)

The method of claim 1, the upper passivation layer completely covering the overcoat layer.

### Claim 10

An organic light emitting display, comprising:
a substrate;
a thin film transistor disposed on the substrate;
an overcoat layer having a first thru-hole formed therethrough to expose a portion of the thin film transistor, the first thru-hole including a surface inclined at an angle not greater than about 60 degrees with respect to an upper surface of the substrate;
an upper passivation layer disposed on the overcoat layer and having a second thru-hole formed therethrough to expose the portion of the thin film transistor;
a first electrode connected to the thin film transistor through the second thru-hole;
a light emitting layer disposed on the first electrode; and
a second electrode disposed on the light emitting layer.

### Claim 11 (depends on 10)

The organic light emitting display of claim 10, the portion of the thin film transistor exposed through the second thru-hole being disposed within the portion of the thin film transistor exposed through the first thru-hole.

### Claim 12 (depends on 10)

The organic light emitting display of claim 10, further comprising a lower passivation layer disposed on the thin film transistor and the overcoat layer.