Organic light emitting diode display device and method of manufacturing the same
View Patent ↗An organic light emitting diode display device includes a plurality of organic light emitting diode elements that are arranged in a matrix; a plurality of protective layers, each of the protective layers covering at least one of the organic light emitting diode elements; and a stress relaxation layer that is formed between the protective layers, for relaxing a stress caused by the protective layers. The stress relaxation layer may surround the protective layer. Moreover, the stress relaxation layer may be made of a shading material, and serve as a mask for forming the organic light emitting diode elements.
1. An organic light emitting diode display device comprising:
a substrate;
a driver formed on the substrate;
a planarizing layer covering the driver, having a contact hole;
a conductive pattern formed on the planarizing layer and an inner surface of the contact hole, electrically connected to the driver;
an organic light emitting diode element electrically connected to the conductive pattern, controlled by the driver and having an upper surface from which light is emitted;
a protective layer comprising a material transmitting the light from the organic light emitting diode element, and covering the upper surface of the organic light emitting diode element and the conductive pattern formed in the contact hole; and
a stress relaxation layer which is made of a shading material and adjacent to sides of the protective layer, for relaxing a stress caused by the protective layer, the protective layer being divided by the stress relaxation layer.
2. The organic light emitting diode display device according to claim 1 , wherein the stress relaxation layer surrounds the protective layer.
3. The organic light emitting diode display device according to claim 1 , wherein there is a space between the sides of the protective layer and the stress relaxation layer.
4. The organic light emitting diode display device according to claim 1 , wherein the stress relaxation layer is made of a material different from that of the protective layer.
5. The organic light emitting diode display device according to claim 1 , wherein both the planarizing layer and the protective layer comprise SiN.
6. The organic light emitting diode display device according to claim 1 wherein the protective layer is made of an inorganic material, and the stress relaxation layer is made of an organic material.
7. The organic light emitting diode display device according to claim 1 , wherein the protective layer is made of a silicon nitride, and the stress relaxation layer is made of a photoresist.
8. The organic light emitting diode display device according to claim 1 , wherein a top face of the stress relaxation layer is above the protective layer.
9. The organic light emitting diode display device according to claim 1 , wherein a vertical cross section of the stress relaxation layer is a trapezoid with a top wider than a base.
10. The organic light emitting diode display device according to claim 1 , wherein the stress relaxation layer is thicker than the protective layer.
11. A method of manufacturing an organic light emitting diode display device, comprising:
forming on a substrate a thin film transistors for driving an organic light emitting diode element;
forming a planarizing layer having a contact hole, for covering the thin film transistors;
forming a conductive pattern on the planarizing layer and an inner surface of the contact hole, electrically connected to the thin film transistor;
forming a stress relaxation layer which is made of a shading material and surrounds area where a protective layer is formed, for relaxing a stress caused by the protective layer;
forming the organic light emitting diode element on a part of the area; and
forming the protective layer on the area to cover the organic light emitting diode element and the conductive pattern formed on the inner surface of the contact hole, wherein the protective layer is divided by the stress relaxation layer.
12. The method of manufacturing the organic light emitting diode display device according to claim 11 , wherein
the stress relaxation layer is thicker than the protective layer.
13. The method of manufacturing an organic light emitting diode display device according to claim 11 , wherein both the planarizing layer and the protective layer compose SiN.
14. An organic light emitting diode display device comprising:
a substrate;
a driver on the substrate;
a planarizing layer having a contact hole, for covering the driver;
an organic light emitting diode element electrically connected to the conductive pattern, controlled by the driver; and having an upper surface from which light is emitted;
a protective layer comprising a material transmitting the light from the organic light emitting diode element, and covering the upper surface of the organic light emitting diode element and the conductive pattern formed on the inner surface of the contact hole;
a wall which is made of a shading material and adjacent to the protective layer; and
a layer on the wall, separated from the protective layer.
15. The organic light emitting diode display device according to claim 14 , wherein
the layer on the wall is made of dielectric material.
16. The organic light emitting diode display device according to claim 14 , wherein
the wall is thicker than the protective layer.
17. The organic light emitting diode display device according to claim 14 , wherein
there is a space between the protective layer and the wall.
18. The organic light emitting diode display device according to claim 14 , wherein both the planarizing layer and the protective layer comprise SiN.