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"Method of Fabricating a Light-Emitting Element" in Patent Application Approval Process

February 12, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- A patent application by the inventor KIM, Yu-Sik (Seoul, KR), filed on September 24, 2013, was made available online on January 30, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to Samsung Electronics Co., Ltd.

The following quote was obtained by the news editors from the background information supplied by the inventors: "Example embodiments relate to a light-emitting element and a method of fabricating the same. More particularly, example embodiments relate to a light-emitting element and a method of fabricating the same, in which spreading of a current in a light-emitting structure is increased or maximized to increase utilization of an active layer and to improve optical efficiency.

"Light-emitting elements such as light-emitting diodes (LEDs) emit light when electrons combine with holes. Light-emitting elements have lower power consumption, have a long life, are installable in a limited space, and are resistant to vibrations.

"A light-emitting element may include a p electrode, an n electrode, and a light-emitting pattern which generates light using a current flowing from the p electrode to the n electrode. Depending on the design of the light-emitting element, not all regions of the light-emitting pattern may be used. That is, a current may flow through only some regions of the light-emitting element and not through other regions. For example, a current may flow through only some regions (i.e., regions located on the path of the current) of the light-emitting pattern which are closer to the p electrode and the n electrode. Accordingly, light may be generated in only part of the light-emitting pattern, thereby deteriorating optical efficiency of the light-emitting element.

"This has led to a demand for a structure which allows a current to flow through more of the regions of a light-emitting pattern, so that light can be generated in more of the regions of the light-emitting pattern."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventor's summary information for this patent application: "Example embodiments of the present invention provide a light-emitting element in which spreading of a current in a light-emitting structure is increased and/or maximized to increase utilization of an active layer and to improve optical efficiency.

"Example embodiments of the present invention also provide a method of fabricating a light-emitting element, in which spreading of a current in a light-emitting structure is increased and/or maximized to increase utilization of an active layer and to improve optical efficiency.

"However, aspects of the present invention are not restricted to the one set forth herein. The above and other aspects of the present invention will become more apparent to one of ordinary skill in the art to which the present invention pertains by referencing the detailed description of the present invention given below.

"According to an aspect of the present inventive concepts, there is provided a light-emitting element including: a first pattern including conductive regions and non-conductive regions. The non-conductive regions are defined by the conductive regions. The light-emitting element also includes an insulating pattern including insulating regions and non-insulating regions which correspond respectively to the conductive regions and non-conductive regions. The non-insulating regions are defined by the insulating regions. The light-emitting element further includes a light-emitting structure interposed between the first pattern and the insulating pattern. The light-emitting structure includes a first semiconductor pattern of a first conductivity type, a light-emitting pattern, and a second semiconductor pattern of a second conductivity type which are stacked sequentially. Additionally, the light-emitting element may include a second pattern formed in the non-insulating regions.

"According to another aspect of the present inventive concepts, there is provided a method of fabricating a light-emitting element. The method includes: forming a first pattern, which includes conductive regions and non-conductive regions on a substrate. The non-conductive regions are defined by the conductive regions. The method also includes forming a light-emitting structure on the substrate having the first pattern by sequentially stacking a first semiconductor pattern of a first conductivity type, a light-emitting pattern, and a second semiconductor pattern of a second conductivity type. The method further includes forming an insulating pattern on the light emitting structure. The insulating pattern includes insulating regions and non-insulating regions. The non-insulating regions are defined by the insulating regions. The method may also include forming a second pattern in the non-insulating regions. The insulating regions of the second pattern correspond respectively to the conductive regions of the first pattern.

BRIEF DESCRIPTION OF THE DRAWINGS

"The above and other aspects and features of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

"FIG. 1A is a cross-sectional view of a light-emitting element according to an example embodiment;

"FIG. 1B is an enlarged view of a region 'A' shown in FIG. 1A;

"FIGS. 2 through 5 are views showing exemplary shapes of a first pattern and an insulating pattern used in the light-emitting element according to an example embodiment;

"FIG. 6 is a view showing the operation of the light-emitting element according to an example embodiment;

"FIGS. 7-9 illustrate a cross-sectional view of a light-emitting element according to different example embodiments;

"FIGS. 10-12 illustrate a view showing a light-emitting device according to other different example embodiments;

"FIGS. 13 through 15 are views showing light-emitting devices according to still further example embodiments;

"FIG. 16 is a view showing a light-emitting device according to an example embodiment;

"FIGS. 17 through 20 are views showing light-emitting devices according to example embodiments; and

"FIGS. 21 through 30 are views showing intermediate processes included in a method of fabricating a light-emitting element according to an example embodiment."

URL and more information on this patent application, see: KIM, Yu-Sik. Method of Fabricating a Light-Emitting Element. Filed September 24, 2013 and posted January 30, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=2120&p=43&f=G&l=50&d=PG01&S1=20140123.PD.&OS=PD/20140123&RS=PD/20140123

Keywords for this news article include: Semiconductor, Samsung Electronics Co. Ltd..

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Source: Electronics Newsweekly


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