Organic light emitting diode display device having a pixel defining layer and method of fabricating the same
AssigneeSamsung Display Co., Ltd.
InventorByung-Hoon Chun
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Abstract
An OLED display device includes a substrate, a TFT on the substrate, the TFT including a semiconductor layer, a gate electrode, and source and drain electrodes, a first electrode electrically connected to one of the source and drain electrodes, a pixel defining layer on the substrate, the pixel defining layer exposing the first electrode and having a reversed trapezoidal shape, an emitting layer on the exposed first electrode, and a second electrode on the emitting layer.
Claims20
An organic light emitting diode (OLED) display device, comprising:
- a substrate;
- a thin film transistor (TFT) on the substrate, the TFT including a semiconductor layer, a gate electrode, and source and drain electrodes;
- a first electrode electrically connected to one of the source and drain electrodes;
- a pixel defining layer on the substrate, the pixel defining layer exposing the first electrode and having a reversed trapezoidal shape, such that the pixel defining layer has a lower surface facing the substrate, and an upper surface facing away from the substrate and projecting past the lower surface to form an overhang;
- an emitting layer on the exposed first electrode;
- and
- a second electrode on the emitting layer, the second electrode including a first portion that overlaps the upper surface of pixel defining layer, and a second portion that projects past the overhang of the pixel defining layer, wherein the first portion and the second portion are continuous.
A method of fabricating an organic light emitting diode (OLED) display device, comprising:
- forming a thin film transistor (TFT) on a substrate, the TFT including a semiconductor layer, a gate electrode, and source and drain electrodes;
- forming a first electrode electrically connected to one of the source and drain electrodes;
- forming a pixel defining layer on the substrate, the pixel defining layer exposing the first electrode and having a reversed trapezoidal shape, such that the pixel defining layer has a lower surface facing the substrate, and an upper surface facing away from the substrate and projecting past the lower surface to form an overhang;
- forming an emitting layer on the exposed first electrode;
- and
- forming a second electrode on the emitting layer, the second electrode including a first portion that overlaps the upper surface of pixel defining layer, and a second portion that projects past the overhang of the pixel defining layer, wherein the first portion and the second portion are continuous.
Dependencies are inferred from the claim text.