Self-light-emitting device and method of manufacturing the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsToshimitsu Konuma, Junya Maruyama
Life of this patent
Estimating the term…
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.
Claims38
A portable information terminal comprising:
- a display portion,
- a TFT;
- a pixel electrode over the TFT;
- 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, and
- wherein the pixel electrode is connected to the TFT.
A portable information terminal comprising:
- a display portion,
- a plurality of TFTs;
- a plurality of pixel electrodes over the TFTs;
- a light emitting layer over the pixel electrodes;
- and
- an electrode over the light emitting layer,
- wherein the pixel electrodes are connected to the TFTs, respectively,
- wherein a first insulator is formed in at least one of spaces between the pixel electrodes, and
- wherein at least one of the pixel electrodes comprises an electrode hole which is filled up with a second insulator.
A portable information terminal comprising:
- a display portion,
- an electric current controlling element;
- an interlayer insulating film formed over the electric current controlling element;
- a contact hole opened in the interlayer insulating film;
- a pixel electrode formed over the 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.
A portable information terminal comprising:
- a display portion,
- a first and a second electric current controlling elements;
- an interlayer insulating film formed over the first and second current controlling elements;
- a first and a second pixel electrodes formed over the interlayer insulating film,
- an insulator formed in a gap between the first and the second pixel electrodes;
- a light emitting layer formed over the first and the second pixel electrodes and the insulator;
- and
- a third electrode formed over the light emitting layer opposed to the first and second pixel electrodes,
- wherein the first and second pixel electrodes are electrically connected to the first and second current controlling elements, respectively;
- and
- wherein a surface of the first pixel electrode and a surface of the insulator are planarized to be flush with each other.
Dependencies are inferred from the claim text.