Light emitting device and manufacturing method thereof
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorToshimitsu Konuma
Life of this patent
Estimating the term…
Abstract
An element structure is provided in which film formation irregularities and deterioration of an organic compound layer formed on an electrode are prevented in an active matrix light emitting device. After forming an insulating film so as to cover edge portions of a conductor which becomes a light emitting element electrode, polishing is performed using a CMP (chemical mechanical polishing) method in the present invention, thus forming a structure in which surfaces of a first electrode and a leveled insulating layer are coplanar. The film formation irregularities in the organic compound layer formed on the electrode can thus be prevented, and electric field concentration from the edge portions of the electrode can be prevented.
Claims18
A light emitting device comprising:
- a first electrode having an edge portion over a substrate;
- a leveled insulating film formed contacting the edge portion of the first electrode;
- an organic compound layer over the first electrode;
- and
- a second electrode in contact with the leveled insulating layer and the organic compound layer;
- wherein surfaces of the first electrode and the leveled insulating layer are coplanar, and
- wherein the substrate is selected from the group consisting of a glass substrate, a quartz substrate, a plastic substrate, a glass ceramic substrate, and a crystallized glass.
A light emitting device comprising:
- a thin film transistor formed over a substrate;
- a wiring on the thin film transistor;
- a first electrode having an edge portion, the first electrode electrically connected to the thin film transistor through the wiring;
- a leveled insulating layer formed contacting the edge portion of the first electrode;
- an organic compound layer formed contacting the first electrode and over the wiring;
- and
- a second electrode formed in contact with the leveled insulating layer and the organic compound layer;
- wherein surfaces of the first electrode and the leveled insulating layer are coplanar, and
- wherein the substrate is selected from the group consisting of a glass substrate, a quartz substrate, a plastic substrate. a glass ceramic substrate, and a crystallized glass.
Dependencies are inferred from the claim text.