THIN FILM TRANSISTOR ARRAY PANEL AND DISPLAY DEVICE INCLUDING THE SAME

• US 20130293524A1
• Filed: 08/29/2012
• Published: 11/07/2013
• Est. Priority Date: 05/07/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: JEONG, Chang Oh, NING, Hong Long, KIM, Hyung Jun, PARK, Joon Yong, KIM, Byeong Beom, SHIN, Sang Won
• Granted Patent: US 9,601,520 B2
• Time in Patent Office: Days
• US Class Current: 345/212
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: G02F 2202/16 conductive
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 29/458 for thin film silicon, e.g. source or drain electrode

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.

Claims

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 indium zinc oxide (IZO) doped with a metal oxide not comprising indium (In) or zinc (Zn), and

wherein the metal oxide has a smaller Gibbs free energy than zinc oxide (ZnO).

2. The panel of claim 1, wherein the metal oxide comprises at least one of Ga₂O₃, Cr₂O₃, MnO, Ta₂O₅, SiO₂, TiO₂, ZrO₂, BaO, Li₂O, La₂O₃, Nd₂O₃, BeO, ThO₂, Y₂O₃, CaO, Sc₂O₃, MgO, Sm₂O₃, Al₂O₃, UO₂, B₂O₃, Na₂O, and Nb₂O₅.

3. The panel of claim 2, 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.

4. The panel of claim 3, 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.

5. The panel of claim 4, further comprising an anisotropic conductive film contacting the contact assistant.

6. The panel of claim 5, wherein the pixel electrode and the contact assistant are arranged on the same layer and comprise the same material as each other.

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

22. The panel of claim 21, wherein the pixel electrode and the contact assistant are arranged directly on the insulating layer.

23. The panel of claim 4, wherein the contact assistant directly contacts the distal end portion of the signal line.

7. 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 indium zinc oxide (IZO) doped with a metal oxide not comprising indium (In) or zinc (Zn), and

wherein the metal oxide has a smaller Gibbs free energy than zinc oxide (ZnO).

8. The display device of claim 7, wherein the metal oxide comprises at least one of Ga₂O₃, Cr₂O₃, MnO, Ta₂O₅, SiO₂, TiO₂, ZrO₂, BaO, Li₂O, La₂O₃, Nd₂O₃, BeO, ThO₂, Y₂O₃, CaO, Sc₂O₃, MgO, Sm₂O₃, Al₂O₃, UO₂, B₂O₃, Na₂O, and Nb₂O₅.

9. The display device of claim 8, 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.

10. 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.

11. The display device of claim 10, further comprising:

an anisotropic conductive film contacting the contact assistant,

wherein the contact assistant and the driver are connected to each other via the anisotropic conductive film.

12. The display device of claim 11, wherein the pixel electrode and the contact assistant are arranged on the same layer and comprise the same material as each other.

13. The display device of claim 12, wherein the driver comprises an integrated circuit (IC) chip.

14. The display device of claim 12, wherein the driver comprises a flexible printed circuit film or a printed circuit board (PCB) mounted with an IC chip.

15. The display device of claim 7, 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.

16. The display device of claim 7, 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.

17. The display device of claim 7, further comprising:

an anisotropic conductive film contacting the contact assistant,

wherein the contact assistant and the driver are connected to each other via the anisotropic conductive film.

18. The display device of claim 7, wherein the pixel electrode and the contact assistant are arranged on the same layer and comprise the same material as each other.

19. The display device of claim 7, wherein the driver comprises an integrated circuit (IC) chip.

20. The display device of claim 7, wherein the driver comprises a flexible printed circuit film or a printed circuit board (PCB) mounted with an IC chip.

24. The display device of claim 12, wherein the pixel electrode and the contact assistant comprise the metal oxide.

25. The display device of claim 24, wherein the pixel electrode and the contact assistant are arranged directly on the insulating layer.

26. The display device of claim 10, wherein the contact assistant directly contacts the distal end portion of the signal line.