Display device and manufacturing method therefor

1. A display device, comprising:

an insulating substrate;

a common electrode disposed on the insulating substrate;

a common voltage applying layer disposed between the insulating substrate and the common electrode, the common voltage applying layer having an upper surface facing the common electrode and a side surface; and

an organic insulating layer which is disposed between the insulating substrate and the common electrode, and is formed with a contact hole which exposes at least a part of the side surface of the common voltage applying layer,

the common electrode electrically connected to the common voltage applying layer in the side surface of which is exposed through the contact hole.

2. The display device according to claim 1 , wherein the side surface contact portion is elongated in a lengthwise direction of the common voltage applying layer.

3. The display device according to claim 1 , wherein the side surface contact portion is formed in plural and disposed in the lengthwise direction of the common voltage applying layer.

4. The display device according to claim 1 , wherein an outer angle between the side surface of the common voltage applying layer which is exposed through the contact hole, and the insulating substrate is less than 90 degree.

5. The display device according to claim 1 , wherein the common voltage applying layer is formed as multi layers, and the area of an upper layer of the common voltage applying layer is bigger than the area of a lower layer thereof.

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

a pixel electrode which is formed between the insulating substrate and the common electrode, and

an emitting material layer which is formed between the pixel electrode and the common electrode,

wherein a light which is generated from the emitting material layer is emitted out through the common electrode.

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

a distanced area which is exposed by the contact hole, and is formed so that at least a part of the side surface of the common voltage applying layer can be distanced from the organic insulating layer, and

an organic layer which is formed on the distanced area,

wherein the organic layer has a smaller thickness than the common voltage applying layer.

8. The display device according to claim 7 , wherein at least a part of the organic layer which is formed on the distanced area is formed by a thermal evaporation.

9. The display device according to claim 7 , wherein the thickness of the common voltage applying layer is 2000 Å to 4000 Å.

10. The display device according to claim 6 , wherein the common voltage applying layer is formed as the same layer as the pixel electrode.

11. The display device according to claim 10 , further comprising a sub common voltage applying layer which is positioned between the common voltage applying layer and the insulating substrate, and is electrically connected with the common voltage applying layer,

wherein a common voltage is applied to at least one of the common voltage applying layer and the sub common voltage applying layer.

12. The display device according to claim 1 , wherein the contact hole further comprises a layering preventing column which exposes at least a part of the upper surface of the common voltage applying layer, contacts with the exposed part of the upper surface of the common voltage applying layer, and comprises a lower surface which contacts with the common voltage applying layer and an upper surface which has a bigger area than the lower surface, and

the common electrode is electrically connected to the exposed upper surface of the common voltage applying layer which is out of contact with the layer preventing column.

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

a distanced area which is exposed by the contact hole, and is formed so that at least one part of the side surface of the common voltage applying layer can be distanced from the organic insulating layer, and

an organic layer which is formed on the distanced area,

wherein the organic layer has a smaller thickness than the common voltage applying layer.

14. The display device according to claim 1 , wherein the common electrode contacts the common voltage applying layer.