Display device and display module

• US 9,766,517 B2
• Filed: 08/31/2015
• Issued: 09/19/2017
• Est. Priority Date: 09/05/2014
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kimura, Hajime, Ishitani, Tetsuji
• Primary Examiner(s): Kim, Dennis Y
• Application Number:
  US14/840,782
• Publication Number:
  US 20160070131A1
• Time in Patent Office: 750 Days
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
• CPC Class Codes: H01L 29/78696 characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel H01L29/78612 takes precedence; transistors having a drain offset region or a lightly doped drain [LDD] H01L29/78621

Abstract

To provide a display device or the like that enables stable curing of a resin. The display device includes a first circuit and a second circuit over the same substrate. The first circuit has a function of performing display; the second circuit has a function of driving the first circuit; the second circuit includes a transistor and a capacitor; the transistor includes an oxide semiconductor layer over a first insulating layer; the capacitor includes a first conductive layer, a second insulating layer, and a second conductive layer; the first conductive layer is positioned over the first insulating layer; one of a source and a drain of the transistor is electrically connected to the second conductive layer; and the first conductive layer and the oxide semiconductor layer include the same metal element.

Claims

1. A display device comprising:

first and second circuits over a substrate,

wherein the first circuit is included in a display portion,

wherein the second circuit is included in a driver circuit portion,

wherein the second circuit includes a transistor and a capacitor,

wherein the transistor comprises;

an oxide semiconductor layer over a first insulating layer; and

source and drain electrodes electrically connected to the oxide semiconductor layer,

wherein a second insulating layer is provided over the oxide semiconductor layer,

wherein the capacitor comprises;

a first conductive layer over the first insulating layer; and

a second conductive layer over the first conductive layer with a third insulating layer therebetween,

wherein the third insulating layer is provided over the second insulating layer and is in contact with the first conductive layer,

wherein one of the source and drain electrodes is electrically connected to the second conductive layer,

wherein the first conductive layer and the oxide semiconductor layer include the same metal element, and

wherein the first conductive layer and the second conductive layer each have a light-transmitting property.

2. The display device according to claim 1, further comprising:

an adhesive layer over the capacitor,

wherein the first conductive layer and the second conductive layer each overlap with the adhesive layer.

3. The display device according to claim 2, wherein the adhesive layer comprises any one of an epoxy resin, an acrylic resin, a silicone resin, a phenol resin, a polyimide resin, an imide resin, a polyvinyl chloride resin, a polyvinyl butyral resin, an ethylene vinyl acetate resin and silica.

4. The display device according to claim 1, wherein the first conductive layer includes a region with a hydrogen concentration higher than that of the oxide semiconductor layer.

5. The display device according to claim 1, wherein the second insulating layer includes a silicon nitride film.

6. The display device according to claim 1, wherein the first circuit includes a liquid crystal element.

7. The display device according to claim 1, wherein the first circuit includes an organic EL element.

8. A display module comprising the display device according to claim 1, wherein a printed circuit is electrically connected to the display device.

9. A display device comprising:

first and second circuits over a substrate,

wherein the first circuit is included in a display portion,

wherein the second circuit is included in a driver circuit portion,

wherein the second circuit includes a transistor, a first capacitor and a second capacitor,

wherein the transistor comprises;

an oxide semiconductor layer over a first insulating layer; and

source and drain electrodes electrically connected to the oxide semiconductor layer,

wherein a second insulating layer is provided over the oxide semiconductor layer,

wherein the first capacitor comprises;

a first conductive layer over the first insulating layer; and

a second conductive layer over the first conductive layer with a third insulating layer therebetween,

wherein the second capacitor comprises;

a third conductive layer; and

the first conductive layer over the third conductive layer with the first insulating layer therebetween,

wherein the third insulating layer is provided over the second insulating layer and is in contact with the first conductive layer,

wherein one of the source and drain electrodes is electrically connected to the second conductive layer,

wherein the first conductive layer and the oxide semiconductor layer include the same metal element, and

wherein the first conductive layer, the second conductive layer, and the third conductive layer each have a light-transmitting property.

10. The display device according to claim 9, wherein the first capacitor and the second capacitor overlap with each other.

11. The display device according to claim 9, wherein the second conductive layer and the third conductive layer are electrically connected to each other.

12. The display device according to claim 9, further comprising:

an adhesive layer over the capacitor,

wherein the first conductive layer and the second conductive layer each overlap with the adhesive layer.

13. The display device according to claim 12, wherein the adhesive layer comprises any one of an epoxy resin, an acrylic resin, a silicone resin, a phenol resin, a polyimide resin, an imide resin, a polyvinyl chloride resin, a polyvinyl butyral resin, an ethylene vinyl acetate resin and silica.

14. The display device according to claim 9, wherein the second insulating layer includes a silicon nitride film.

15. The display device according to claim 9, wherein the first circuit includes a liquid crystal element.

16. The display device according to claim 9, wherein the first circuit includes an organic EL element.

17. A display module comprising the display device according to claim 9, wherein a printed circuit is electrically connected to the display device.