Self-light-emitting device and method of manufacturing the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsToshimitsu Konuma, Junya Maruyama
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Abstract
Failure light emission of an EL element due to failure film formation of an organic EL material in an electrode hole 46 is improved. By forming the organic EL material after embedding an insulator in an electrode hole 46 on a pixel electrode and forming a protective portion 41b, failure film formation in the electrode hole 46 can be prevented. This can prevent concentration of electric current due to a short circuit between a cathode and an anode of the EL element, and can prevent failure light emission of an EL layer.
Claims48
A portable information terminal comprising:
- a display portion comprising,
- a TFT;
- an interlayer insulating film over the TFT;
- a pixel electrode over the interlayer insulating film;
- a light emitting layer over the pixel electrode;
- and
- a counter electrode over the light emitting layer,
- wherein the pixel electrode comprises an electrode hole which is filled up with an insulator comprising an organic resin,
- wherein the pixel electrode is connected to the TFT, and
- wherein at least a portion of an upper surface of the insulator is overlapped with the light emitting layer.
A portable information terminal comprising:
- a display portion comprising,
- an electric current controlling element;
- a first interlayer insulating film formed over the electric current controlling element;
- a second interlayer insulating film over the first interlayer insulating film;
- a contact hole opened in the second interlayer insulating film;
- a pixel electrode formed over the second interlayer insulating film and electrically connected to the electric current controlling element through the contact hole;
- an insulator comprising an organic resin formed over a portion of the pixel electrode in the contact hole;
- a light emitting layer formed over the pixel electrode and the insulator;
- and
- an electrode formed over the light emitting layer,
- wherein at least a portion of an upper surface of the insulator is overlapped with the light emitting layer.
An audio playback device comprising:
- a display portion comprising,
- a TFT;
- an interlayer insulating film over the TFT;
- a pixel electrode over the interlayer insulating film;
- a light emitting layer over the pixel electrode;
- and
- a counter electrode over the light emitting layer,
- wherein the pixel electrode comprises an electrode hole which is filled up with an insulator comprising an organic resin,
- wherein the pixel electrode is connected to the TFT, and
- wherein at least a portion of an upper surface of the insulator is overlapped with the light emitting layer.
An audio playback device comprising:
- a display portion comprising,
- an electric current controlling element;
- a first interlayer insulating film formed over the electric current controlling element;
- a second interlayer insulating film over the first interlayer insulating film;
- a contact hole opened in the second interlayer insulating film;
- a pixel electrode formed over the second interlayer insulating film and electrically connected to the electric current controlling element through the contact hole;
- an insulator comprising an organic resin formed over a portion of the pixel electrode in the contact hole;
- a light emitting layer formed over the pixel electrode and the insulator;
- and
- an electrode formed over the light emitting layer,
- wherein at least a portion of an upper surface of the insulator is overlapped with the light emitting layer.
Dependencies are inferred from the claim text.