Thin film transistor array panel and display device including the same

Patent metadata

Field	Value
Publication number	US-9601520-B2
Application number	US-201213597940-A
Country	US
Kind code	B2
Filing date	Aug 29, 2012
Priority date	May 7, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

Exemplary embodiments of the present invention relate to a panel and a display device including the same, the panel including a substrate, a signal line arranged on the substrate, the signal line configured to transmit a driving signal, an insulating layer arranged on the signal line, and a pixel electrode and a contact assistant arranged on the insulating layer. The contact assistant is electrically connected to a portion of the signal line, the contact assistant includes indium zinc oxide doped with a metal oxide not including indium or zinc, and the metal oxide has a smaller Gibbs free energy than zinc oxide.

First claim

What is claimed is:

1. A panel, comprising:
a substrate;
a signal line arranged on the substrate, the signal line configured to transmit a driving signal;
an insulating layer arranged on the signal line; and
a pixel electrode and a contact assistant arranged on the insulating layer,
wherein the contact assistant is electrically connected to a portion of the signal line,
wherein the contact assistant comprises a layer having an upper surface directly contacting a conductive film, the layer comprising indium zinc oxide (IZO) and a metal oxide,
wherein the metal oxide has a smaller Gibbs free energy than zinc oxide (ZnO), and an amount of the metal oxide is less than an amount of the IZO of the contact assistant, and
wherein the metal oxide is at least one selected from the group consisting of Cr 2 O 3 , MnO, Ta 2 O 5 , ZrO 2 , BaO, Li 2 O, La 2 O 3 , Nd 2 O 3 , BeO, ThO 2 , CaO, MgO, Sm 2 O 3 , UO 2 , Na 2 O, and Nb 2 O 5 .

2. The panel of claim 1 , wherein the signal line comprises at least one of a gate line configured to transmit a gate signal and a data line configured to transmit a data voltage.

3. The panel of claim 2 , wherein the insulating layer comprises a contact hole exposing the portion of the signal line,
wherein the contact assistant is electrically connected to the portion of the signal line through the contact hole, and
wherein the portion of the signal line is a distal end of the signal line.

4. The panel of claim 3 , wherein the conductive film is an anisotropic conductive film.

5. The panel of claim 3 , wherein the contact assistant directly contacts the distal end portion of the signal line.

6. The panel of claim 4 , wherein the pixel electrode and the contact assistant are arranged on the same layer and comprise the same material as each other.

7. The panel of claim 6 , wherein the pixel electrode and the contact assistant comprise the metal oxide.

8. The panel of claim 7 , wherein the pixel electrode and the contact assistant are arranged directly on the insulating layer.

9. A display device, comprising:
a substrate;
a signal line arranged on the substrate, the signal line configured to transmit a driving signal;
an insulating layer arranged on the signal line;
a pixel electrode and a contact assistant arranged on the insulating layer; and
a driver contacting the contact assistant,
wherein the contact assistant is electrically connected to a portion of the signal line,
wherein the contact assistant comprises a layer having an upper surface directly contacting a conductive film, the layer comprising indium zinc oxide (IZO) as a host and a metal oxide as a dopant for the IZO,
wherein the metal oxide has a smaller Gibbs free energy than zinc oxide (ZnO), and an amount of the metal oxide is less than an amount of the IZO of the contact assistant, and
wherein the metal oxide is at least one selected from the group consisting of Cr 2 O 3 , MnO, Ta 2 O 5 , ZrO 2 , BaO, Li 2 O, La 2 O 3 , Nd 2 O 3 , BeO, ThO 2 , CaO, MgO, Sm 2 O 3 , UO 2 , Na 2 O, and Nb 2 O 5 .

10. The display device of claim 9 , wherein the signal line comprises at least one of a gate line configured to transmit a gate signal and a data line configured to transmit a data voltage.

11. The display device of claim 10 , wherein the insulating layer comprises a contact hole exposing the portion of the signal line,
wherein the contact assistant is electrically connected to the portion of the signal line through the contact hole, and
wherein the portion of the signal line is a distal end of the signal line.

12. The display device of claim 11 , wherein the conductive film is an anisotropic conductive film, and
wherein the contact assistant and the driver are connected to each other via the anisotropic conductive film.

13. The display device of claim 11 , wherein the contact assistant directly contacts the distal end portion of the signal line.

14. The display device of claim 12 , wherein the pixel electrode and the contact assistant are arranged on the same layer and comprise the same material as each other.

15. The display device of claim 14 , wherein the driver comprises an integrated circuit (IC) chip.

16. The display device of claim 14 , wherein the driver comprises a flexible printed circuit film or a printed circuit board (PCB) mounted with an IC chip.

17. The display device of claim 14 , wherein the pixel electrode and the contact assistant comprise the metal oxide.

18. The display device of claim 17 , wherein the pixel electrode and the contact assistant are arranged directly on the insulating layer.

19. The display device of claim 9 , wherein the signal line comprises at least one of a gate line configured to transmit a gate signal and a data line configured to transmit a data voltage.

20. The display device of claim 9 , wherein the insulating layer comprises a contact hole exposing the portion of the signal line,
wherein the contact assistant is electrically connected to the portion of the signal line through the contact hole, and
wherein the portion of the signal line is a distal end of the signal line.

21. The display device of claim 9 , wherein the conductive film is an anisotropic conductive film, and
wherein the contact assistant and the driver are connected to each other via the anisotropic conductive film.

22. The display device of claim 9 , wherein the pixel electrode and the contact assistant are arranged on the same layer and comprise the same material as each other.

23. The display device of claim 9 , wherein the driver comprises an integrated circuit (IC) chip.

24. The display device of claim 9 , wherein the driver comprises a flexible printed circuit film or a printed circuit board (PCB) mounted with an IC chip.

Assignees

• Park Joon Yong
• Jeong Chang Oh
• Kim Byeong Beom
• Ning Hong Long
• Kim Hyung Jun
• Shin Sang Won
• Samsung Display Co Ltd

Inventors

• Park Joon Yong
• Jeong Chang Oh
• Kim Byeong Beom
• Ning Hong Long
• Kim Hyung Jun
• Shin Sang Won

Classifications

• H10D30/6737

  characterised by the electrode materials · CPC title

• H10D86/441 Primary

  Interconnections, e.g. scanning lines · CPC title

• H01L27/124 Primary

  Electricity · mapped topic

• G02F1/13458 Primary

  Terminal pads · CPC title

• G02F2202/16

  conductive · CPC title