Light-emitting device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsJunya Maruyama, Hisao Ikeda
Life of this patent
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Abstract
The present invention provides a technique for performing film-forming of a cathode comprising a metallic with a good adhesion, as well as a light-emitting device producing a good image to be displayed. An EL element is fabricated to have a structure in which an electron transport layer comprising a low molecular weight film is provided on a luminescent layer (104) comprising a polymer film and a cathode (106) comprising a metallic film is provided on the resultant electron transport layer. With such structure, occurrence of delamination or a dark spot derived from inferior adhesion of the cathode (106) can be prevented to obtain the light-emitting device producing a good image quality.
Claims18
A light-emitting device comprising an electro luminescence element comprising an anode, a polymer film provided on said anode, a low molecular weight film provided in contact with said polymer film and a cathode provided in contact with said low molecular weight film.
A light-emitting device comprising:
- a thin film transistor provided on an insulating surface;
- and
- an electro luminescence element which is electrically connected with said thin film transistor,
- a resin interlayer insulating film having an uppermost surface hardened over said thin film transistor, and
- wherein said electro luminescence element comprises an anode, a polymer film provided on said anode, a low molecular weight film provided in contact with said polymer film and a cathode provided in contact with said low molecular weight film.
A light-emitting device comprising:
- a thin film transistor provided on an insulating film;
- and
- an electro luminescence element which is electrically connected with said thin film transistor,
- wherein said electro luminescence element comprises an anode, a polymer film provided on said anode, a low molecular weight film provided in contact with said polymer film and a cathode provided in contact with said low molecular weight film, and
- wherein an edge of said anode is covered with a resin film having an uppermost surface thereof being hardened.
A light-emitting device comprising:
- a thin film transistor provided on an insulating surface;
- and
- an electro luminescence element which is electrically connected with said thin film transistor,
- a resin interlayer insulating film having an uppermost surface hardened over said thin film transistor,
- wherein said electro luminescence element comprises an anode, a polymer film provided on said anode, a low molecular weight film provided in contact with said polymer film and a cathode provided in contact with said low molecular weight film, and
- wherein an edge of said anode is covered with a resin film having an uppermost surface thereof being hardened.
A light-emitting device comprising:
- a thin film transistor provided on an insulating surface;
- and
- an electro luminescence element which is electrically connected with said thin film transistor,
- wherein said electro luminescence element comprises an anode, a polymer film provided on said anode, a low molecular weight film provided in contact with said polymer film and a cathode provided in contact with said low molecular weight film, and
- wherein an edge of said anode is covered with a resin film having an uppermost surface covered with a protective film.
A light-emitting device comprising:
- a thin film transistor provided on an insulating surface;
- and
- an electro luminescence element which is electrically connected with said thin film transistor,
- a resin interlayer insulating film having an uppermost surface hardened over said thin film transistor,
- wherein said electro luminescence element comprises an anode, a polymer film provided on said anode, a low molecular weight film provided in contact with said polymer film and a cathode provided in contact with said low molecular weight film, and
- wherein an edge of said anode is covered with a resin film having an uppermost surface covered with a protective film.
Dependencies are inferred from the claim text.