Organic light emitting display device and method of fabricating the same
AssigneeSamsung SDI Co., Ltd.
InventorTae-Wook Kang
Life of this patent
Estimating the term…
Abstract
An organic light emitting display device and a method of fabricating the same. A dummy pattern is formed in an emission region to increase the step height of the emission region by an electrode material while a thin film transistor is fabricated, so that a distance between a pixel electrode and a donor film is decreased during fabrication of an organic layer. This reduced distance reduces laser energy for transfer using laser-induced thermal imaging, thus improving life span and efficiency of the device. Further, the pixel electrode can extend into a thin film transistor region and a capacitor region, thus enhancing an aperture ratio.
Claims20
An organic light emitting display device, comprising:
- an emission region including a pixel electrode, an organic layer that includes at least an emission layer, and an opposite electrode on a substrate, the emission region being defined by a pixel defining layer, a dummy pattern being arranged in the emission region under the pixel electrode;
- a thin film transistor region including a gate electrode and source and drain electrodes;
- and
- a capacitor region including a lower electrode and an upper electrode.
A method of fabricating an organic light emitting display device, comprising:
- forming first conductive layer patterns on a substrate that is divided into a first region, a second region and a third region, respectively;
- forming a first insulating layer on the substrate and on the first conductive layer patterns;
- forming second conductive layer patterns on the first insulating layer in the first region, the second region and the third region, respectively;
- forming a second insulating layer on an entire surface of the second conductive layer and on exposed portions of the first insulating layer;
- forming third conductive layer patterns on the second insulating layer in first region, the second region and the third region, respectively;
- forming a third insulating layer on an entire surface of the third conductive layer and on exposed portions of the second insulating layer;
- forming a pixel electrode on the third insulating layer in the first region, the pixel electrode adapted to be connected to the third conductive pattern in the second region;
- forming a fourth insulating layer on the pixel electrode and on exposed portions of the third insulating layer;
- patterning the fourth insulating layer to expose at least a portion of the pixel electrode in the first region;
- forming an organic layer on the exposed portion of the pixel electrode, the organic layer including at least an emission layer;
- and
- forming an opposite electrode on at least the organic layer.
Dependencies are inferred from the claim text.