Light emitting device and method of manufacturing the same
First Claim
1. A light emitting device comprising:
- a pixel portion including a plurality of light emitting elements, a driving circuit and a terminal portion, between a first substrate having an insulating surface and a second substrate having translucency, each of the light emitting elements including;
a first electrode;
a layer containing an organic compound on the first electrode; and
a second electrode on the layer containing the organic compound, wherein the terminal portion is placed on the first substrate so as to be positioned outside the second substrate; and
wherein the first substrate and the second substrate are bonded to each other through an adhesive in which conductive fine particles having different diameters are mixed, whereas the second electrode and a wiring from the terminal portion are electrically connected to each other.
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Abstract
An ink jet method known as a method for selectively forming a layer made of a polymeric organic compound is advantageous in that a layer containing an organic compound can be separately colored for emitting light of three colors (R, G, B) at a time. However, this ink jet method is disadvantageous in its poor film formation accuracy, and therefore, it is difficult to control the formation of the film for obtaining the uniformity. As a result, the obtained film is likely to have unevenness. In the present invention, an layer containing an organic compound is formed on the entire surface of a lower electrode connected to a thin film transistor by application. After forming an upper electrode on the lower electrode, an layer containing an organic compound is etched in a self-aligned manner by plasma etching using the upper electrode as a mask so as to allow the selective formation of an layer containing an organic compound. Furthermore, for connection with the upper electrode, the electrical connection is achieved by using an adhesive containing a conductive particle or a paste. Furthermore, a material emitting white light or a material emitting monochromatic light is used as the layer containing an organic compound. The full-color display is achieved by combining the layer containing an organic compound with a color conversion layer or a colored layer.
112 Citations
52 Claims
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1. A light emitting device comprising:
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a pixel portion including a plurality of light emitting elements, a driving circuit and a terminal portion, between a first substrate having an insulating surface and a second substrate having translucency, each of the light emitting elements including;
a first electrode;
a layer containing an organic compound on the first electrode; and
a second electrode on the layer containing the organic compound,wherein the terminal portion is placed on the first substrate so as to be positioned outside the second substrate; and
wherein the first substrate and the second substrate are bonded to each other through an adhesive in which conductive fine particles having different diameters are mixed, whereas the second electrode and a wiring from the terminal portion are electrically connected to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A light emitting device comprising:
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a pixel portion including a plurality of light emitting elements, a driving circuit and a terminal portion, between a first substrate having an insulating surface and a second substrate having translucency, each of the light emitting elements including;
a first electrode;
a layer containing an organic compound on the first electrode; and
a second electrode on the layer containing the organic compound,wherein the terminal portion is placed on the first substrate so as to be positioned outside the second substrate; and
wherein the first substrate and the second substrate are bonded to each other through an adhesive in which a fine particle made of an inorganic material and a conductive fine particle having a larger diameter than that of the fine particle are mixed, whereas the second electrode and a wiring from the terminal portion are electrically connected to each other. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A light emitting device comprising:
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a pixel portion including a plurality of light emitting elements, each of the light emitting elements including;
a first electrode;
a layer containing an organic compound on the first electrode; and
a second electrode on the layer containing the organic compound; and
a terminal portion, wherein an end face of the layer containing the organic compound is flush with that of the second electrode; and
wherein there is a portion where the second electrode and a wiring extending from the terminal portion are electrically connected through an adhesive containing a conductive fine particle, between the terminal portion and the pixel portion. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A light emitting device comprising:
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a pixel portion including a plurality of light emitting elements, each of the light emitting elements including;
a first electrode;
a layer containing an organic compound on the first electrode; and
a second electrode on the layer containing the organic compound; and
a terminal portion, wherein an end face of the layer containing the organic compound is flush with that of the second electrode; and
wherein there is a portion where the second electrode and a wiring extending from the terminal portion are connected through a third electrode covering the second electrode, between the terminal portion and the pixel portion. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method of manufacturing a light emitting device including a light emitting element having:
- an anode;
a layer containing an organic compound on the anode; and
a cathode on the layer containing the organic compound, comprising;
forming a first electrode having translucency;
forming the layer containing the organic compound by application on the first electrode;
selectively forming a second electrode made of a metal on the layer containing the organic compound by vapor deposition of heating a vapor deposition material;
etching the layer containing the organic compound in a self-aligned manner by plasma etching using the second electrode as a mask; and
selectively forming a third electrode made of a metal so as to cover the second electrode. - View Dependent Claims (41, 42, 43, 44)
- an anode;
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45. A method of manufacturing a light emitting device including a light emitting element having:
- an anode;
a layer containing an organic compound on the anode; and
a cathode on the layer containing the organic compound, comprising;
forming a first electrode having translucency;
forming the layer containing the organic compound by application on the first electrode;
selectively forming a second electrode made of a metal on the layer containing the organic compound by vapor deposition of heating a vapor deposition material;
etching the layer containing the organic compound in a self-aligned manner by plasma etching using the second electrode as a mask; and
connecting the second electrode and a wiring extending from a terminal portion to each other through an adhesive containing a conductive particle. - View Dependent Claims (46, 47, 48)
- an anode;
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49. A method of manufacturing a light emitting device including a light emitting element having:
- an anode;
a layer containing an organic compound on the anode; and
a cathode on the layer containing the organic compound, comprising;
forming a thin film transistor on a first substrate;
forming a first electrode to be connected to the thin film transistor;
forming the layer containing the organic compound, made of a polymeric material, by application on the first electrode;
selectively forming a second electrode made of a metal on the layer containing the organic compound by vapor deposition of heating a vapor deposition material;
etching the layer containing the organic compound in a self-aligned manner by plasma etching using the second electrode as a mask; and
connecting the second electrode and a wiring extending from a terminal portion to each other through an adhesive containing a conductive particle, while bonding the first substrate and a second substrate to each other. - View Dependent Claims (50, 51, 52)
- an anode;
Specification