Luminance improved organic electroluminescent device
First Claim
1. A method for fabricating an organic light emitting diode, comprising the steps of:
- providing a substrate including a TFT with source and drain electrodes formed on a first insulating film;
forming a second insulating film on the substrate;
forming a lower electrode on the second insulating film and connecting the lower electrode to one of the source and drain electrodes;
forming a third insulating film on the substrate;
forming an opening for exposing a portion of the lower electrode and simultaneously forming a groove surrounding the lower electrode by etching the third insulating film, the groove being formed directly above at least one of the source and drain electrodes of the TFT;
forming a luminescent layer on the lower electrode inside the opening; and
forming an upper electrode on the substrate including the groove so that the upper electrode surrounds the luminescent layer.
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Accused Products
Abstract
An organic light emitting diode (OLED) is capable of improving light efficiency per pixel unit by forming a cathode electrode to cover an anode electrode, thereby focusing light emitted from a luminescent layer per pixel unit. The OLED comprises: a second insulating film formed on a substrate including a TFT with source/drain electrodes formed on a first insulating film; a lower electrode formed on the second insulating film and connected to one of the source/drain electrodes; a third insulating film having an opening for exposing a portion of the lower electrode; a luminescent layer formed on the lower electrode inside the opening; a groove formed to surround the luminescent layer; and an upper electrode formed on the substrate including the groove so that the upper electrode surrounds the luminescent layer. The upper electrode functions as a reflection layer for reflecting total light while light emitted from the luminescent layer is being pulled out through the substrate.
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Citations
10 Claims
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1. A method for fabricating an organic light emitting diode, comprising the steps of:
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providing a substrate including a TFT with source and drain electrodes formed on a first insulating film; forming a second insulating film on the substrate; forming a lower electrode on the second insulating film and connecting the lower electrode to one of the source and drain electrodes; forming a third insulating film on the substrate; forming an opening for exposing a portion of the lower electrode and simultaneously forming a groove surrounding the lower electrode by etching the third insulating film, the groove being formed directly above at least one of the source and drain electrodes of the TFT; forming a luminescent layer on the lower electrode inside the opening; and forming an upper electrode on the substrate including the groove so that the upper electrode surrounds the luminescent layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification
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- Resources
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Current AssigneeSamsung Display Company Limited (Samsung Electronics Co. Ltd.)
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Original AssigneeSamsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
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InventorsPark, Jin-Woo, Koo, Jae-Bon
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Primary Examiner(s)Patel; Nimeshkumar D.
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Assistant Examiner(s)Perry; Anthony T
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Application NumberUS12/153,263Publication NumberTime in Patent Office887 DaysField of Search313/498, 313/504, 313/506, 445/24US Class Current445/24CPC Class CodesH10K 50/82 CathodesH10K 50/856 comprising reflective meansH10K 59/12 Active-matrix OLED [AMOLED]...H10K 59/8052 CathodesH10K 59/878 comprising reflective means
