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US 7,453,198 B2Granted
Organic light emitting display and method of fabricating the same
AssigneeSamsung SDI Co., Ltd.
InventorsTae-Wook Kang, Kwan-Hee Lee
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Abstract
An OLED and a method of fabricating the same are provided, in which, when a reflective layer pattern is formed, a thin layer for a pixel electrode is opened at an edge of an emission region to form the pixel electrode without additional photolithography and etching processes by forming an undercut under the edge of the reflective layer pattern, i.e., under the edge of the emission region by over-etching, thereby simplifying the process and increasing the yield.
Claims9
An organic light emitting display, comprising:
- a substrate;
- a thin-film transistor disposed on the substrate, the thin film transistor comprising a gate electrode, a source electrode and a drain electrode;
- an insulating layer disposed on the substrate, the insulating layer having a via-contact hole;
- a reflective layer pattern disposed in an emission region and connected to one of the source electrode and the drain electrode through the via-contact hole, the reflective layer pattern protruding in a horizontal direction by an undercut formed at an edge of the emission region of the insulating layer;
- a first electrode disposed on the reflective layer pattern and the insulating layer, the first electrode disposed on the reflective layer pattern and the first electrode disposed on the insulating layer disconnected to each other at an edge of the reflective layer pattern;
- an organic layer disposed on the first electrode in a portion of the emission region, the organic layer comprising at least an emission layer;
- and
- a second electrode disposed on the organic layer.
5 more elements
A method of fabricating an organic light emitting display, comprising:
- preparing a substrate;
- forming a thin-film transistor on the substrate, the thin film transistor comprising a gate electrode, a source electrode and a drain electrode;
- forming an insulating layer on the substrate, the insulating layer having a via-contact hole;
- forming a reflective layer pattern protruding in a horizontal direction in an emission region by an undercut at an edge of the emission region of the insulating layer, the reflective layer pattern connected to one of the source electrode and the drain electrode through the via-contact hole;
- forming a first electrode on the reflective layer pattern and the insulating layer, the first electrode disposed on the reflective layer pattern and the first electrode disposed on the insulating layer disconnected to each other by the undercut;
- forming an organic layer comprising at least an emission layer on the first electrode in a portion of the emission region;
- and
- forming a second electrode on the organic layer.
5 more elements
Dependencies are inferred from the claim text.