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US 2006/0049753 A1Published application
Organic light emitting display and method of fabricating the same
AssigneeSamsung SDI Co., Ltd.
InventorsTae-Wook Kang, Kwan-Hee Lee
Life of this patent
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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.
Claims18
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
A method of fabricating an organic light emitting display, comprising:
- forming a thin-film transistor on a substrate to form a first structure, the thin-film transistor comprising a gate electrode, a source electrode and a drain electrode;
- forming an insulating layer on the first structure to form a second structure, the insulating layer having a via-contact hole that exposes one of the source electrode and the drain electrode;
- forming a reflective layer on the second structure, the reflective layer being connected to one of the source electrode and the drain electrode through the via-contact hole;
- forming a reflective layer pattern protruding in a horizontal direction by etching the reflective layer and removing the insulating layer disposed under an edge of the reflective layer pattern to form an undercut under the edge of the reflective layer pattern;
- forming a first electrode by forming a thin layer for a first electrode on the resultant structure, the first electrode being patterned by the undercut formed under the edge of the reflective layer pattern;
- forming an organic layer having at least an emission layer on the first electrode;
- and
- forming a second electrode on the organic layer.
5 more elements
Dependencies are inferred from the claim text.