Organic LED display device of active matrix drive type and fabrication method therefor
First Claim
1. An organic LED display device of active matrix drive type comprising:
- a substrate;
a thin film transistor supported by the substrate;
a planarization film provided over the thin film transistor; and
an organic LED device provided on the planarization film, and the organic LED device comprising an entirely planar conductive pixel electrode on a planar surface of the planarization film and electrically connected to a drain electrode of the thin film transistor via a conductive interconnection extending through a contact hole in the planarization film, an organic LED layer comprising at least one organic light emitting layer and a counter electrode;
the thin film transistor being operative to control one of a current and a voltage to be applied to the LED device;
wherein the interconnection includes an end face flush with a surface of the planarization film on the side of a pixel electrode.
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Abstract
An organic LED display device of active matrix drive type comprises: a substrate; a thin film transistor provided on the substrate; a planarization film provided over the thin film transistor; and an organic LED device provided on the planarization film, and comprising a pixel electrode electrically connected to a drain electrode of the thin film transistor via an interconnection extending through the planarization film, an organic LED layer comprising at least one organic light emitting layer, and a counter electrode; the thin film transistor being operative to control one of a current and a voltage to be applied to the LED device; wherein the interconnection has an end face flush with a surface of the planarization film on a pixel electrode side.
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Citations
9 Claims
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1. An organic LED display device of active matrix drive type comprising:
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a substrate;
a thin film transistor supported by the substrate;
a planarization film provided over the thin film transistor; and
an organic LED device provided on the planarization film, and the organic LED device comprising an entirely planar conductive pixel electrode on a planar surface of the planarization film and electrically connected to a drain electrode of the thin film transistor via a conductive interconnection extending through a contact hole in the planarization film, an organic LED layer comprising at least one organic light emitting layer and a counter electrode;
the thin film transistor being operative to control one of a current and a voltage to be applied to the LED device;
wherein the interconnection includes an end face flush with a surface of the planarization film on the side of a pixel electrode. - View Dependent Claims (2, 3, 4, 5)
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6. A method for fabricating an organic LED display device of active matrix drive type which comprises an organic LED device and a thin film transistor connected to the organic LED device for controlling a current or a voltage to be applied to the LED device, the method comprising:
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forming the thin film transistor on a substrate;
forming a planarization film over the thin film transistor;
forming a contact hole in the planarization film;
forming a conductive interconnection in the contact hole so as to have an end face flush with a planar surface of the planarization film;
forming an entirely planar pixel electrode on the planar surface of the planarization film and over the interconnection so that the pixel electrode is in electrical communication with the transistor via the interconnection;
forming an organic LED layer including at least one light emitting layer on the pixel electrode; and
forming a counter electrode on the organic LED layer. - View Dependent Claims (7, 8, 9)
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Specification