Source: http://www.google.com/patents/US7786519
Timestamp: 2017-03-30 19:40:22
Document Index: 615529775

Matched Legal Cases: ['Application No. 10', 'art 126', 'art 126', 'art 226', 'art 226', 'arts 226', 'art 426', 'art 426', 'art 426', 'art 426', 'art 426', 'art 526', 'art 526', 'art 526', 'art 526', 'art 526', 'art 626', 'art 626', 'art 626', 'art 626', 'art 426']

Patent US7786519 - Light emitting device and method for manufacturing the same - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThis document discloses an organic light emitting device comprising a first electrode and a wire comprising a contact part formed on a substrate, an insulating layer formed on the first electrode and a portion of the wire, the insulating layer comprising an opening which exposes a portion of the first...http://www.google.com/patents/US7786519?utm_source=gb-gplus-sharePatent US7786519 - Light emitting device and method for manufacturing the sameAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7786519 B2Publication typeGrantApplication numberUS 11/645,541Publication dateAug 31, 2010Filing dateDec 27, 2006Priority dateApr 10, 2006Fee statusPaidAlso published asCN101055886A, EP1845560A1, US20070235767Publication number11645541, 645541, US 7786519 B2, US 7786519B2, US-B2-7786519, US7786519 B2, US7786519B2InventorsChun Tak LeeOriginal AssigneeLg Electronics Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (13), Non-Patent Citations (2), Classifications (9), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetLight emitting device and method for manufacturing the same
US 7786519 B2Abstract
This document discloses an organic light emitting device comprising a first electrode and a wire comprising a contact part formed on a substrate, an insulating layer formed on the first electrode and a portion of the wire, the insulating layer comprising an opening which exposes a portion of the first electrode and a contact hole which exposes an entire upper surface of the contact part, an emission layer formed in the opening, a second electrode formed on the emission layer and the upper surface of the contact part though the contact hole.
This application claims priority to and the benefit of Korea Patent Application No. 10-2006-0032511, filed on Apr. 10, 2006, the entire content of which is incorporated herein by reference.
As can be seen from a contacting region indicated by alphabet ‘E’ of FIG. 1B, the contact hole 136 is formed to expose a portion of an upper surface of the contact part 126. Therefore, the contacting area of the contact part 126 and cathode 160 becomes narrow.
Accordingly, the present invention provides an organic light emitting device comprising a first electrode and a wire comprising a contact part formed on a substrate, an insulating layer formed on the first electrode and a portion of the wire, the insulating layer comprising an opening which exposes a portion of the first electrode and a contact hole which exposes an entire upper surface of the contact part, an emission layer formed in the opening, a second electrode formed on the emission layer and the upper surface of the contact part though the contact hole.
FIG. 1A is a plan view of illustrating a prior art light emitting device.
An embodiment will be described with reference to the accompanying drawings. However, the present invention is not limited to one embodiment described below, but may be embodied in a variety of forms. In the drawings, if it is mentioned that a layer is positioned on a different layer or a substrate, the layer may be formed directly on the different layer or the substrate, or another layer may be interposed therebetween. Like reference numerals designate like elements.
FIG. 2A is a plan view of a light emitting device according to an embodiment of the present invention. FIG. 2B is across sectional view taken along line B-B′ of FIG. 2A.
As can be seen through a contacting region marked by an alphabet ‘E’ of FIG. 2B, the second electrode 260 can contact with upper and side surfaces of the contact part 226 through the contact hole 236. Accordingly, as the contacting area between the second electrode 260 and contact part 226 increases, the interfacial resistance therebetween can be greatly lessened. Moreover, because the insulating layer 230 formed on the contact parts 226 are completely eliminated, the problem such as a peeling phenomenon of the insulating layer 230 which has occurred conventionally can be solved.
FIGS. 4 to 6 are cross sectional views of illustrating contact regions (E) of light emitting devices according to other embodiments of the present invention.
As shown in the contact region ‘E’ of FIG. 4, a contact part 426 formed as a multiple-layer structure of ITO/Mo/Al/Mo is disposed on a substrate 410. On the contact part 426 there is disposed an insulating layer 430 comprising a contact hole 436 for exposing the entire upper surface of the contact part 426. And, a second electrode 460 is disposed, which contacts with the entire upper surface of the contact part 426 through the contact hole 436. In case of the light emitting device comprising the contacting region as shown in FIG. 4, the interfacial resistance between the second electrode 460 and contact part 426 is reduced because the contacting area therebetween is broad, and therefore the driving voltage of the light emitting device is lowered.
As shown in the contact region ‘E’ of FIG. 5, a contact part 526 formed as a multiple-layer structure of ITO/Mo/Al/Mo is disposed on a substrate 510. On the contact part 526 there is disposed an insulating layer 530 comprising a contact hole 536 for exposing a portion of the upper and side surfaces of the contact part 526. And, a second electrode 560 is disposed, which contacts with the entire upper surface and a portion of the side surfaces of the contact part 526 through the contact hole 536. In case of the light emitting device comprising the contacting region as shown in FIG. 5, the interfacial resistance between the second electrode 560 and contact part 526 is reduced because the contacting area therebetween is broad, and therefore the driving voltage of a light emitting device is lowered.
As shown in the contact region ‘E’ of FIG. 6, a contact part 626 formed as a multiple-layer structure of ITO/Mo/Al/Mo is disposed on a substrate 610. On the contact part 626 there is disposed an insulating layer 630 comprising a contact hole 636 for exposing a portion of the upper and side surfaces of the contact part 626. And, a second electrode 660 is disposed, which contacts with a portion of the upper and side surfaces of the contact part 626 through the contact hole 636. In case of the light emitting device comprising the contacting region as shown in FIG. 6, the interfacial resistance between the second electrode 460 and contact part 426 is reduced because the contacting area therebetween is broad, and therefore the driving voltage of the light emitting device can be lowered.
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