Flexible organic light emitting diode display device and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-2017005292-A1
Application number	US-201514935277-A
Country	US
Kind code	A1
Filing date	Nov 6, 2015
Priority date	Jun 30, 2015
Publication date	Jan 5, 2017
Grant date	—

Abstract

Embodiments relate to a method of forming an organic light emitting diode (OLED) display device. A first inorganic layer, a first organic layer, and a second inorganic layer are formed on pixel regions of an OLED display device. At least part of a first inorganic layer is formed using atomic layer deposition (ALD), such that the first inorganic layer completely covers particles generated on the OLED. Embodiments also relate to an OLED display device with pixel regions, each pixel region including an OLED, a bank layer across a boundary between adjacent pixel regions, and a first inorganic layer on at least a portion of the OLED and the bank layer. The first inorganic layer includes a first inorganic sub-layer and a second inorganic sub-layer.

First claim

What is claimed is:

1 . A method of forming an organic light emitting diode (OLED) display device, comprising:
forming a plurality of pixel regions on a display area of a flexible substrate, each of the pixel regions including an OLED; forming at least part of a first inorganic layer on the plurality of pixel regions using atomic layer deposition (ALD) or plasma-enhanced chemical vapor deposition (PECVD); forming a first organic layer; and forming a second inorganic layer using PECVD.

2 . The method of claim 1 , wherein the entire first inorganic layer is formed using ALD.

3 . The method of claim 1 , wherein forming at least part of the first inorganic layer comprises:
forming a first inorganic sub-layer of the first inorganic layer using ALD; and forming a second inorganic sub-layer of the first inorganic layer using PECVD.

4 . The method of claim 3 , wherein the second inorganic sub-layer is formed on the first inorganic sub-layer.

5 . The method of claim 3 , wherein the first inorganic sub-layer is formed on the second inorganic sub-layer.

6 . The method of claim 1 , further comprising forming a second organic layer on the second inorganic layer.

7 . The method of claim 6 , wherein a thickness of the first organic layer is larger than a thickness of the second organic layer, the first organic layer formed of acryl-based compounds and the second organic layer formed of epoxy-based compounds.

8 . The method of claim 6 , wherein a modulus value of the second organic layer is smaller than a modulus value of the first organic layer.

9 . The method of claim 3 , wherein a thickness of the first inorganic sub-layer is 0.01 to 0.1 micrometers.

10 . The method of claim 3 , wherein a thickness of the second inorganic sub-layer and the second inorganic layer is 0.1 to 2 micrometers.

11 . An organic light emitting diode (OLED) display device comprising:
a flexible substrate having a display area and a non-display area; a plurality of pixel regions on the display area of the flexible substrate, each of the pixel regions comprising:
a driving transistor,
an organic light emitting diode comprising a first electrode, an organic emitting layer and a second electrode, the first electrode connected to an electrode of the driving transistor,
a bank layer placed in and extending across a boundary between the pixel region and a pixel region adjacent to the pixel region,
a spacer on a portion of the bank layer, a portion of the spacer of a first distance to the bank layer having a width smaller than a width of another portion of the spacer of a second distance larger than the first distance to the bank layer, and
a first inorganic layer covering at least a portion of a side surface of the spacer.

12 . The display device of claim 11 , further comprising a first organic layer on the first inorganic layer, and a second inorganic layer on the first organic layer, wherein a thickness of the second inorganic layer is larger than a thickness of the first inorganic layer.

13 . The display device of claim 12 , wherein the thickness of the first inorganic layer is 0.01 to 0.1 micrometers.

14 . The display device of claim 12 , wherein the thickness of the second inorganic layer is 0.1 to 2 micrometers.

15 . The display device of claim 12 , wherein the spacer is of a reversed-tapered shape.

16 . The display device of claim 11 , wherein the first inorganic layer is deposited by atomic layer deposition (ALD).

17 . The display device of claim 11 , further comprising a second electrode material pattern on a top surface of the spacer, wherein the second electrode material pattern is physically isolated from the second electrode.

18 . An organic light emitting diode (OLED) display device comprising:
a flexible substrate having a display area and a non-display area; a plurality of pixel regions on the display area of the flexible substrate, each of the pixel regions comprising:
a driving transistor,
an organic light emitting diode comprising a first electrode, an organic emitting layer and a second electrode, the first electrode connected to an electrode of the driving transistor,
a bank layer placed in and extending across a boundary between the pixel region and a pixel region adjacent to the pixel region, and
a first inorganic layer on at least a portion of the organic light emitting diode and on at least a portion of the bank layer, the first inorganic layer comprising a first inorganic sub-layer and a second inorganic sub-layer.

19 . The display device of claim 18 , wherein at least one of the first inorganic sub-layer or the second inorganic sub-layer has a thickness of 0.01 to 0.1 micrometers.

20 . The display device of claim 18 , further comprising a spacer on a portion of the bank layer, a portion of the spacer of a first distance to the bank layer having a width smaller than a width of another portion of the spacer of a second distance larger than the first distance to the bank layer.

21 . The display device of claim 18 , further comprising a first organic layer on the first inorganic layer, a second inorganic layer on the first organic layer, and a second organic layer on the second inorganic layer, wherein a modulus value of the second organic layer is smaller than a modulus value of the first organic layer.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Jae-Young
• Kim Ji-Min
• KIM Gi-Youn
• Oh Sang-Hoon

Classifications

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K50/8445

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K71/00 Primary

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H01L51/5256 Primary

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic