Organic light emitting diode display and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2021013292-A1
Application number	US-202017026991-A
Country	US
Kind code	A1
Filing date	Sep 21, 2020
Priority date	Aug 13, 2015
Publication date	Jan 14, 2021
Grant date	—

Abstract

A display device includes: a substrate; a semiconductor layer; a gate electrode overlapping the semiconductor layer; a common voltage line disposed on a same layer as the gate electrode; a common voltage line anti-oxidation layer disposed on the common voltage line; an interlayer insulating layer; source and drain electrodes disposed on the interlayer insulating layer; and a common voltage applying electrode disposed on a same layer as the source electrode and the drain electrode. The common voltage applying electrode is connected to the common voltage line through a first contact hole formed in the interlayer insulating layer, the common voltage line anti-oxidation layer includes an opening overlapping the common voltage line, the interlayer insulating layer is disposed in the opening, a width of the opening is smaller than a width of the common voltage line, and the first contact hole is disposed in the opening in a plan view.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate; a driving semiconductor layer disposed on the substrate; a driving gate electrode overlapping the driving semiconductor layer; a common voltage line disposed on the substrate and on a same layer as the driving gate electrode, wherein the common voltage line is configured to supply a common voltage; a gate electrode anti-oxidation layer disposed on the driving gate electrode; a common voltage line anti-oxidation layer disposed on the common voltage line; an interlayer insulating layer disposed on the driving semiconductor layer, the driving gate electrode, the common voltage line, the driving gate electrode anti-oxidation layer, and the common voltage line anti-oxidation layer; a driving source electrode and a driving drain electrode disposed on the interlayer insulating layer; and a common voltage applying electrode disposed on the interlayer insulating layer and disposed on a same layer as the driving source electrode and the driving drain electrode, wherein: the common voltage applying electrode is connected to the common voltage line through a first contact hole formed in the interlayer insulating layer; the common voltage line anti-oxidation layer comprises an opening overlapping the common voltage line; the interlayer insulating layer is disposed in the opening; a width of the opening is smaller than a width of the common voltage line; and the first contact hole is disposed in the opening in a plan view.

2 . The display device of claim 1 , wherein:
the driving gate electrode and the common voltage line comprise at least one material selected from a group consisting of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), molybdenum tungsten (MoW), and copper (Cu); and the gate electrode anti-oxidation layer and the common voltage line anti-oxidation layer comprise a transparent conductive material.

3 . The display device of claim 2 , wherein:
the driving gate electrode and the common voltage line comprise a first layer comprising aluminum (Al), and a second layer disposed on the first layer and comprising molybdenum (Mo); and the gate electrode anti-oxidation layer and the common voltage line anti-oxidation layer comprise indium tin oxide (ITO).

4 . The display device of claim 1 , further comprising:
a passivation layer disposed on the driving source electrode, the driving drain electrode, and the common voltage applying electrode; and a pixel electrode disposed on the passivation layer and connected to the driving drain electrode.

5 . The display device of claim 4 , further comprising a pixel defining layer disposed on an edge of the pixel electrode and exposing the pixel electrode.

6 . The display device of claim 5 , further comprising an organic emission layer disposed on the exposed pixel electrode, and a common electrode disposed on the organic emission layer and the pixel defining layer.

7 . The display device of claim 6 , wherein the pixel defining layer and the passivation layer comprise a second contact hole exposing a portion of the common voltage applying electrode.

8 . The display device of claim 7 , wherein the common electrode is connected to the common voltage applying electrode through the second contact hole.

9 . The display device of claim 4 , further comprising a capacitor including a first capacitive plate and a second capacitive plate with the passivation layer disposed therebetween.

10 . The display device of claim 9 , wherein:
the first capacitive plate is disposed on the same layer as the driving gate electrode; and the second capacitive plate is disposed on the same layer as the driving source electrode and the driving drain electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• You Chun Gi
• Lee Gwang Geun

Classifications

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/131

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

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10D86/481

  integrated with passive devices, e.g. auxiliary capacitors · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title