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US 10,854,699 B2Granted
Organic light emitting display device with auxiliary electrode and method of manufacturing the same
AssigneeLG Display Co., Ltd.
InventorsJoonsuk Lee, SeJune Kim
Life of this patent
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Abstract
Discussed is an organic light emitting display device with auxiliary electrode and method of manufacturing the same according to the embodiments. The present disclosure is directed to provide a top emission type transparent organic light emitting display device and a method of manufacturing the same, which provides an area of an auxiliary electrode that effectively reduces a resistance of a cathode electrode, and decreases the number of masks, thereby simplifying the manufacturing process.
Claims10
A method of manufacturing an organic light emitting display device, the method comprising:
- forming an anode electrode on a substrate;
- forming a first bank on the anode electrode;
- forming an auxiliary electrode on the first bank, wherein the auxiliary electrode includes a lower auxiliary electrode, an upper auxiliary electrode and a cover auxiliary electrode sequentially stacked in a vertical direction, and wherein the cover auxiliary electrode has an open side exposing a side surface of the upper auxiliary electrode;
- removing the upper auxiliary electrode selectively to form a separation space between the cover auxiliary electrode and the lower auxiliary electrode, wherein the lower auxiliary electrode, the separation space and the cover auxiliary electrode are sequentially stacked in the vertical direction;
- forming a second bank on the auxiliary electrode, wherein the second bank exposes the open side of the cover auxiliary electrode;
- forming an organic emission layer on the anode electrode, wherein the organic emission layer is not deposited in the separation space;
- and
- forming a cathode electrode on the organic emission layer, wherein the cathode electrode is deposited in the separation space to directly contact the lower auxiliary electrode within the separation space, wherein the lower auxiliary electrode, the cathode electrode, the separation space and the cover auxiliary electrode are sequentially stacked in the vertical direction.
5 more elements
A method of manufacturing an organic light emitting display device, the method comprising:
- forming an anode electrode on a substrate;
- forming a first bank on the anode electrode;
- forming an auxiliary electrode on the first bank, wherein the auxiliary electrode includes a lower auxiliary electrode, an upper auxiliary electrode and a cover auxiliary electrode, and wherein the cover auxiliary electrode has an open side exposing a side surface of the upper auxiliary electrode;
- removing the upper auxiliary electrode selectively to form a separation space between the cover auxiliary electrode and the lower auxiliary electrode;
- forming a second bank on the auxiliary electrode, wherein the second bank exposes the open side of the cover auxiliary electrode;
- after the forming of the second bank, ashing the first bank and the second bank to externally expose the anode electrode in a region other than a one side and another side of the anode electrode;
- forming an organic emission layer on the anode electrode, wherein the organic emission layer is not deposited in the separation space;
- and
- forming a cathode electrode on the organic emission layer, wherein the cathode electrode is deposited in the separation space to directly contact the lower auxiliary electrode.
6 more elements
A method of manufacturing an organic light emitting display device, the method comprising:
- forming an anode electrode on a substrate;
- forming a first bank on the anode electrode;
- forming an auxiliary electrode on the first bank, wherein the auxiliary electrode includes a lower auxiliary electrode, an upper auxiliary electrode and a cover auxiliary electrode, and wherein the cover auxiliary electrode has an open side exposing a side surface of the upper auxiliary electrode;
- removing the upper auxiliary electrode selectively to form a separation space between the cover auxiliary electrode and the lower auxiliary electrode;
- forming a second bank on the auxiliary electrode, wherein the second bank exposes the open side of the cover auxiliary electrode;
- forming an organic emission layer on the anode electrode, wherein the organic emission layer is not deposited in the separation space;
- and
- forming a cathode electrode on the organic emission layer;
- wherein the cathode electrode is deposited in the separation space to directly contact the lower auxiliary electrode,
- wherein the forming the auxiliary electrode comprises:
- forming the auxiliary electrode;
- and
- forming a photoresist pattern on the auxiliary electrode to expose one side surface of the upper auxiliary electrode,
- wherein the removing of the upper auxiliary electrode in a certain area of the auxiliary electrode is conducted by using the photoresist pattern as a mask, and
- wherein the forming of the second bank is conducted by using the photoresist pattern.
12 more elements
Dependencies are inferred from the claim text.