Display device and method of fabricating the display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsShunpei Yamazaki, Hideomi Suzawa, Ichiro Uehara
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Abstract
In an EL element having an anode, an insulating film (bump) formed on the anode, and an EL film and a cathode formed on the insulating film, each of a bottom end portion and a top end portion of the insulating film is formed so as to have a curved surface. The taper angle of a central portion of the insulating film is set within the range from 35° to 70°, thereby preventing the gradient of the film forming surface on which the EL film and the cathode are to be formed from being abruptly changed. On the thus-formed film forming surface, the EL film and the cathode can be formed so as to be uniform in thickness, so that occurrence of discontinuity in each of EL film and the cathode is prevented.
Claims21
A display device comprising:
- a substrate;
- a transistor over the substrate;
- a first insulating film over the transistor, wherein the first insulating film is an organic insulating film and comprises an opening;
- a first electrode over the first insulating film, wherein the first electrode is electrically connected to the transistor;
- a second insulating film over the first insulating film and covering an end portion of the first electrode, wherein the second insulating film is provided in the opening of the first insulating film;
- a light-emitting layer over the first electrode and the second insulating film;
- and
- a second electrode over the light-emitting layer,
- wherein a side surface of the second insulating film has a sloped surface taper angle that continuously changes.
An electronic equipment comprising:
- a housing;
- and
- a display device comprising:
- a substrate;
- a transistor over the substrate;
- a first insulating film over the transistor, wherein the first insulating film is an organic insulating film and comprises an opening;
- a first electrode over the first insulating film, wherein the first electrode is electrically connected to the transistor;
- a second insulating film over the first insulating film and covering an end portion of the first electrode, wherein the second insulating film is provided in the opening of the first insulating film;
- a light-emitting layer over the first electrode and the second insulating film;
- and
- a second electrode over the light-emitting layer,
- wherein a side surface of the second insulating film has a sloped surface taper angle that continuously changes, and
- wherein the housing includes a curved surface in a display surface.
An electronic equipment comprising:
- a housing;
- and
- a display device comprising:
- a substrate;
- a transistor over the substrate;
- a first insulating film over the transistor, wherein the first insulating film is an organic insulating film and comprises an opening;
- a first electrode over the first insulating film, wherein the first electrode is electrically connected to the transistor;
- a second insulating film over the first insulating film and covering an end portion of the first electrode, wherein the second insulating film is provided in the opening of the first insulating film;
- a light-emitting layer over the first electrode and the second insulating film;
- and
- a second electrode over the light-emitting layer,
- wherein a side surface of the second insulating film has a sloped surface taper angle that continuously changes,
- wherein the housing includes a curved surface in a display surface, and
- wherein the display device is curved.
Dependencies are inferred from the claim text.