Thin film transistor array substrate and organic light-emitting display apparatus including the same

Patent metadata

Field	Value
Publication number	US-9812518-B2
Application number	US-201514945177-A
Country	US
Kind code	B2
Filing date	Nov 18, 2015
Priority date	Apr 7, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

Provided is a thin film transistor array substrate. The thin film transistor array substrate includes a first sub-pixel region and a second sub-pixel region; a first thin film transistor and a second thin film transistor disposed in the first sub-pixel region and the second sub-pixel region on the substrate, respectively; and a first insulating layer including at least one first dummy hole formed above or adjacent to the first thin film transistor, and a plurality of second dummy holes formed in a greater number than the at least one first dummy hole, formed above or adjacent to the second thin film transistor.

First claim

What is claimed is:

1. A thin film transistor array substrate comprising:
a substrate comprising a first sub-pixel region and a second sub-pixel region adjacent the first sub-pixel region;
a first thin film transistor and a second thin film transistor disposed in the first sub-pixel region and the second sub-pixel region of the substrate, respectively; and
a first insulating layer comprising
at least one first dummy hole formed above or adjacent to the first thin film transistor, wherein a “dummy hole” is defined as a through-hole formed without being coated or filled by a metal material, and
a plurality of second dummy holes, which are formed in a greater number than the at least one first dummy hole, formed above or adjacent to the second thin film transistor.

2. The thin film transistor array substrate of claim 1 , further comprising a second insulating layer, at least a portion of which is buried in the at least one first dummy hole and the plurality of second dummy holes, and which is formed of a material different from the first insulating layer.

3. The thin film transistor array substrate of claim 1 , further comprising a third sub-pixel region that is adjacent to at least one of the first sub-pixel region and the second sub-pixel region,
a third thin film transistor disposed in the third sub-pixel region on the substrate, and the first insulating layer further comprising at least one third dummy hole formed above or adjacent to the third thin film transistor.

4. The thin film transistor array substrate of claim 3 , the first sub-pixel region, the second sub-pixel region, and the third sub-pixel region corresponding to a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region, respectively.

5. The thin film transistor array substrate of claim 2 , the first insulating layer comprising an inorganic insulating material and the second insulating layer comprising an organic insulating material.

6. The thin film transistor array substrate of claim 2 , at least one of the first thin film transistor and the second thin film transistor comprising:
an active pattern on the substrate; and
a first conductive layer comprising a gate electrode disposed on at least a portion of the active pattern,
the thin film transistor array substrate further comprising:
a second conductive layer disposed on an upper portion of the first conductive layer and comprising an upper electrode forming a capacitor together with the gate electrode; and
a third conductive layer comprising a driving voltage line electrically connected to the upper electrode via a contact hole formed in the first insulating layer and applying a power voltage to the upper electrode.

7. The thin film transistor array substrate of claim 6 , further comprising:
a lower gate insulating layer disposed between the active pattern and the gate electrode; and
an upper gate insulating layer disposed between the gate electrode and the second conductive layer,
the first insulating layer disposed on the upper gate insulating layer to cover the second conductive layer, and
the second insulating layer disposed on the first insulating layer to cover the third conductive layer.

8. The thin film transistor array substrate of claim 7 , at least one of the at least one first dummy hole and the plurality of second dummy holes pass through the upper gate insulating layer and the lower gate insulating layer to extend up to an upper surface of the substrate.

9. The thin film transistor array substrate of claim 7 , at least one of the at least one first dummy hole and the plurality of second dummy holes extending up to an upper surface of the upper electrode.

10. The thin film transistor array substrate of claim 7 , the lower gate insulating layer comprising:
a first lower gate insulating layer comprising a silicon oxide; and
a second lower gate insulating layer disposed between the first lower gate insulating layer and the gate electrode and comprising a silicon nitride.

11. The thin film transistor array substrate of claim 10 , the gate electrode comprising aluminum (Al).

12. An organic light-emitting display apparatus comprising:
a substrate comprising a first sub-pixel region and a second sub-pixel region adjacent the first sub-pixel region;
a first thin film transistor and a second thin film transistor disposed in the first sub-pixel region and the second sub-pixel region on the substrate, respectively;
a first insulating layer comprising at least one first dummy hole formed above or adjacent to the at least one first thin film transistor, and a plurality of second dummy holes formed in a greater number than the at least one first dummy hole, formed above or adjacent to the second thin film transistor;
a second insulating layer, at least a portion of which is buried in the at least one first dummy hole and the plurality of second dummy holes, and which are formed of a material different from the first insulating layer;
a first pixel electrode and a second pixel electrode disposed in the first sub-pixel region and the second sub-pixel region on the second insulating layer, respectively;
a first organic emission layer and a second organic emission layer disposed on the first pixel electrode and the second pixel electrode, respectively, and emitting light of different colors; and
a common electrode disposed on the first organic emission layer and the second organic emission layer.

13. The organic light-emitting display apparatus of claim 12 , the substrate further comprising:
a third sub-pixel region that is adjacent to at least one of the first sub-pixel region and the second sub-pixel region, the third sub-pixel region including:
a third thin film transistor disposed on the substrate, and
at least one third dummy hole formed in the first insulating layer, above or adjacent to the third thin film transistor, and the second insulating layer is buried in the third dummy hole, and
a third pixel electrode and a third organic emission layer disposed on the third pixel electrode are disposed on the second insulating layer.

14. The organic light-emitting display apparatus of claim 13 , the first sub-pixel region, the second sub-pixel region, and the third sub-pixel region corresponding to a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region, respectively, and
the first organic emission layer, the second organic emission layer, and the third organic emission layer emit red light, green light, and blue light, respectively.

15. The organic light-emitting display apparatus of claim 12 , the first insulating layer comprising an inorganic insulating material and the second insulating layer comprising an organic insulating material.

16. The organic light-emitting display apparatus of claim 12 , at least one of the first thin film transistor and the second thin film transistor comprising:
an active pattern on the substrate; and
a first conductive layer comprising a gate electrode disposed on at least a portion of the active pattern, and
the organic light-emitting display apparatus further comprising:
a second conductive layer disposed on an upper portion of the first conductive layer and comprising an upper electrode forming a capacitor together with the gate electrode; and
a third conductive layer comprising a driving voltage line electrically connected to the upper electrode via a contact hole formed in the first insulating layer and applying a power voltage to the upper electrode.

17. The organic light-emitting display apparatus of claim 16 , further comprising:
a low

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hyunchul

Classifications

• H10W20/42

  Vias, e.g. via plugs · CPC title

• H01L27/124

  Electricity · mapped topic

• H01L27/1255

  Electricity · mapped topic

• H01L23/5226

  Electricity · mapped topic

• H01L29/78675

  Electricity · mapped topic