ARRAY SUBSTRATE OF DISPLAY DEVICE

• US 20110147757A1
• Filed: 12/15/2010
• Published: 06/23/2011
• Est. Priority Date: 12/17/2009
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: PARK, Kyung-Min, PARK, Ji-Yong, PARK, Jin-Suk, CHOI, Kyung-Hyun, LEE, Dae-Won, KIM, Ki-Hoon, PARK, Gyung-Soon
• Application Number:
  US12/968,456
• Publication Number:
  US 20110147757A1
• Time in Patent Office: Days
• US Class Current: 257/71
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 29/78633 with a light shield

Abstract

An array substrate of a display device, the array substrate: a substrate having a first region and a second region spaced apart from the first region; a blocking layer located on the substrate; a first electrode located on the blocking layer in the second region; an insulating film located on the blocking layer to cover the first electrode; a second electrode located on the insulating film to overlap the first electrode; and a third electrode overlapping the first electrode between the substrate and the blocking layer. Accordingly, it is possible to reduce an area that is occupied by a storage capacitor in a pixel region and to achieve high luminance by increasing the aperture ratio, by providing a structure and method of increasing a storage capacitance of the same area.

Claims

1. An array substrate of a display device, the array substrate comprising:

a substrate having a first region and a second region spaced apart from the first region;

a blocking layer located on the substrate;

a first electrode located on the blocking layer in the second region;

an insulating film located on the blocking layer to cover the first electrode;

a second electrode located on the insulating film to overlap the first electrode; and

a third electrode overlapping the first electrode between the substrate and the blocking layer.

2. The array substrate of claim 1, wherein the third electrode includes a transparent conductive material.

3. The array substrate of claim 1, wherein the third electrode includes an opaque conductive material.

4. The array substrate of claim 1, wherein the second electrode and the third electrode are electrically connected.

5. An array substrate of a display device, the array substrate comprising:

a substrate having a first region and a second region spaced apart from the first region;

a blocking layer located on the substrate;

a first electrode located on the blocking layer in the second region;

an insulating film located on the blocking layer to cover the first electrode;

a second electrode located on the insulating film to overlap the first electrode;

an interlayer insulating film located on the second electrode; and

a fourth electrode overlapping the second electrode on the interlayer insulating film.

6. The array substrate of claim 5, wherein the fourth electrode includes a transparent conductive material.

7. The array substrate of claim 5, wherein the fourth electrode includes an opaque conductive material.

8. The array substrate of claim 5, wherein the first electrode and the fourth electrode are electrically connected.

9. An array substrate of a display device, the array substrate comprising:

a substrate having a first region and a second region spaced apart from the first region;

a blocking layer located on the substrate;

a first electrode located on the blocking layer in the second region;

an insulating film located on the blocking layer to cover the first electrode;

a second electrode located on the insulating film to overlap the first electrode;

a third electrode overlapping the first electrode between the substrate and the blocking layer;

an interlayer insulating film located on the second electrode; and

a fourth electrode overlapping the second electrode on the interlayer insulating film.

10. The array substrate of claim 9, wherein the first electrode and the fourth electrode are electrically connected, and the second electrode and the third electrode are electrically connected.

11. An array substrate of a display device, the array substrate comprising:

a substrate having a first region and a second region spaced apart from the first region;

a blocking layer located on the substrate;

a first electrode located on the blocking layer in the second region;

an insulating film located on the blocking layer to cover the first electrode;

a second electrode located on the insulating film to overlap the first electrode; and

a transistor located in the first region, the transistor comprising;

a channel region,

a source region connected with the channel region,

a drain region, and

a gate region,

wherein the drain region and the gate region are spaced apart from the source region,

wherein the insulating film insulates the channel region, the source region, the drain region and the gate region.

12. The array substrate of claim 11, wherein the first electrode is formed on the same layer as the channel region, the source region, and the drain region.

13. An array substrate of a display device, the array substrate comprising:

a substrate having a first region and a second region spaced apart from the first region;

a blocking layer located on the substrate;

a first electrode located on the blocking layer in the second region;

an insulating film located on the blocking layer to cover the first electrode;

a second electrode located on the insulating film to overlap the first electrode;

a transistor located in the first region; and

a light block layer overlapping the transistor between the substrate and the blocking layer.

14. The array substrate of claim 13, further comprising a third electrode overlapping the first electrode between the substrate and the blocking layer.

15. The array substrate of claim 14, wherein the third electrode includes an opaque conductive material.

16. The array substrate of claim 14, wherein the third electrode includes a transparent conductive material.

17. The array substrate of claim 13, further comprising:

an interlayer insulating film covering the transistor and the second electrode; and

a fourth electrode located on the interlayer insulating film to overlap the second electrode.

18. The array substrate of claim 13, further comprising:

a third electrode overlapping the first electrode between the substrate and the blocking layer;

an interlayer insulating film covering the transistor and the second electrode; and

a fourth electrode located on the interlayer insulating film to overlap the second electrode.

19. The array substrate of claim 13, wherein the light block layer is formed using different materials stacked upon each other.

20. The array substrate of claim 19, wherein the different materials are a transparent conductive material and an opaque conductive material.

21. An array substrate of a display device, the array substrate comprising:

a substrate having a first region and a second region spaced apart from the first region;

a blocking layer located on the substrate;

a transistor located in the first region, the transistor comprising

a semiconductor layer,

a gate electrode located in a region overlapping the semiconductor layer, and

an insulating film insulating the gate electrode from the semiconductor layer;

a light block layer overlapping the transistor between the substrate and the blocking layer;

a second electrode located on the insulating film in the second region and used as the upper electrode of a storage capacitor; and

a third electrode overlapping the upper electrode of the storage capacitor, and located under the blocking layer in the second region,

wherein the third electrode is used as a lower electrode of the storage capacitor.

22. The array substrate of claim 21, wherein the second electrode and the third electrode are formed using a transparent conductive material.

23. The array substrate of claim 21, wherein the second electrode and the third electrode are formed to have a width corresponding to the entire transmitting region of each pixel.

24. The array substrate of claim 21, wherein the light block layer is formed using different materials stacked upon each other.

25. The array substrate of claim 24, wherein the different materials are formed using a transparent conductive material and an opaque conductive material.

26. A method of manufacturing an array substrate of a display device, the method comprising:

forming a light block layer in a first region on a substrate;

forming a first electrode in a second region on the substrate, the second region being spaced apart from the first region on the substrate;

forming a blocking layer on the substrate, the light block layer and the first electrode;

forming a semiconductor layer on the blocking layer in the first region, the semiconductor layer including a source region, a drain region, and an active region;

forming a second electrode on the blocking layer in the second region;

forming an insulating film on the semiconductor layer and the second electrode;

forming a gate electrode on the insulating film above the active region; and

forming a third electrode on the insulating film overlapping the first electrode.

27. The method of claim 26, further comprising:

forming an interlayer insulating layer on the insulating film, the gate electrode and the third electrode;

forming a source electrode and a drain electrode on the interlayer insulating layer, the source electrode and the drain electrode being in contact with the source region and the drain region, respectively, through via holes corresponding to the source region and the drain region in the interlayer insulating layer and the insulating film;

forming a passivation layer on the interlayer insulating layer, the source electrode and the drain electrode; and

forming a pixel electrode on the passivation layer, the pixel electrode contacting the drain electrode through a via hole formed in the passivation layer.

28. The method of claim 26, wherein the first electrode is formed using a transparent conductive material.

29. The method of claim 26, wherein the first electrode is formed using an opaque conductive material.

30. The method of claim 26, wherein the first electrode and the third electrode are electrically connected.

31. The method of claim 27, further comprising:

forming a fourth electrode between the interlayer insulating layer and the passivation layer in the second region.

32. The method of claim 31, wherein the fourth electrode contacts the drain electrode.

33. The method of claim 31, wherein the fourth electrode is formed using a transparent conductive material.

34. The method of claim 31, wherein the fourth electrode is formed using an opaque conductive material.

35. The method of claim 31, wherein the second electrode and the fourth electrode are electrically connected.

36. The method of claim 31, wherein the fourth electrode contacts the drain electrode.

37. The method of claim 26, wherein the second electrode contacts the drain region.

38. The method of claim 26, wherein the second electrode is formed on the same layer as the semiconductor layer.

39. The method of claim 26, wherein the light block layer comprises:

a transparent layer located on the substrate; and

an opaque layer located on the transparent layer and below the blocking layer.

40. A storage capacitor of a display device having an array substrate including a thin film transistor (TFT) and the storage capacitor, the storage capacitor comprising:

a first electrode located on a substrate;

a blocking layer located on the first electrode and the substrate;

a second electrode located on the blocking layer;

an insulating film located on the second electrode and the blocking layer;

a third electrode located on the insulating film and overlapping the first electrode; and

an interlayer insulting film located on the third electrode and the insulating film.

41. The storage capacitor of claim 40, wherein the first electrode is formed using a transparent conductive material.

42. The storage capacitor of claim 40, wherein the first electrode is formed using an opaque conductive material.

43. The storage capacitor of claim 40, wherein the first electrode and the third electrode are electrically connected.

44. The storage capacitor of claim 40, further comprising a fourth electrode located on the interlayer insulating film and overlapping the third electrode.

45. The storage capacitor of claim 44, wherein the fourth electrode is formed using a transparent conductive material.

46. The storage capacitor of claim 44, wherein the fourth electrode is formed using an opaque conductive material.

47. The storage capacitor of claim 44, wherein the second electrode and the fourth electrode are electrically connected.

48. The storage capacitor of claim 44, wherein the fourth electrode is connected to a drain electrode of the TFT.

49. The storage capacitor of claim 40, wherein the second electrode is connected to a drain region of the TFT.

50. The storage capacitor of claim 40, wherein the first electrode and the third electrode are formed using a transparent conductive material and both have a width of an entire transmitting region of each respective pixel of the display device.