With Particular Semiconductor Material Patents (Class 257/103)
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Patent number: 8890297Abstract: A light emitting device package according to embodiments comprises: a package body; a lead frame on the package body; a light emitting device supported by the package body and electrically connected with the lead frame; a filling material surrounding the light emitting device; and a phosphor layer comprising phosphors on the filling material.Type: GrantFiled: December 20, 2011Date of Patent: November 18, 2014Assignee: LG Innotek Co., Ltd.Inventors: Yu Ho Won, Geun Ho Kim
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Patent number: 8890184Abstract: A nanostructured light-emitting device including: a first type semiconductor layer; a plurality of nanostructures each including a first type semiconductor nano-core grown in a three-dimensional (3D) shape on the first type semiconductor layer, an active layer formed to surround a surface of the first type semiconductor nano-core, and a second type semiconductor layer formed to surround a surface of the active layer and including indium (In); and at least one flat structure layer including a flat-active layer and a flat-second type semiconductor layer that are sequentially formed on the first type semiconductor layer parallel to the first type semiconductor layer.Type: GrantFiled: February 10, 2012Date of Patent: November 18, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Joo-sung Kim, Taek Kim, Moon-seung Yang
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Patent number: 8884505Abstract: A light emitting device comprises a first conductive semiconductor layer, a plurality of light emitting cells separated on the first conductive semiconductor layer, a phosphor layer on at least one of the light emitting cells, and a plurality of second electrodes electrically connected to the light emitting cells.Type: GrantFiled: November 18, 2009Date of Patent: November 11, 2014Assignee: LG Innotek Co., Ltd.Inventor: Sang Youl Lee
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Patent number: 8884268Abstract: The present disclosure is directed to an integrated circuit and its formation. In some embodiments, the integrated circuit includes a diffusion barrier layer. The diffusion barrier layer can be arranged to prevent diffusion of the Si and O2 from a Si substrate into a Group III nitride layer. The diffusion barrier layer can comprise Al2O3. In some embodiments, the integrated circuit further comprises a lattice-matching structure disposed between the silicon substrate and a Group III nitride layer.Type: GrantFiled: July 16, 2012Date of Patent: November 11, 2014Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Chi-Ming Chen, Han-Chin Chiu, Chung-Yi Yu, Chia-Shiung Tsai
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Patent number: 8884330Abstract: A wavelength-converting structure for a wavelength-converted light emitting diode (LED) assembly. The wavelength-converting structure includes a thin film structure having a non-uniform top surface. The non-uniform top surface is configured increase extraction of light from the top surface of a wavelength-converting structure.Type: GrantFiled: April 13, 2011Date of Patent: November 11, 2014Assignee: Osram Sylvania Inc.Inventors: Madis Raukas, Adam M. Scotch, Yi Zheng, Darshan Kundaliya
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Patent number: 8882935Abstract: A method for the fabrication of nonpolar indium gallium nitride (InGaN) films as well as nonpolar InGaN-containing device structures using metalorganic chemical vapor deposition (MOVCD). The method is used to fabricate nonpolar InGaN/GaN violet and near-ultraviolet light emitting diodes and laser diodes.Type: GrantFiled: June 4, 2013Date of Patent: November 11, 2014Assignees: The Regents of the University of California, The Japan Science and Technology AgencyInventors: Arpan Chakraborty, Benjamin A. Haskell, Stacia Keller, James S. Speck, Steven P. DenBaars, Shuji Nakamura, Umesh K. Mishra
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Patent number: 8882971Abstract: A sputtering apparatus (1) includes: a chamber (10) having an inside maintained in a depressurized state to generate plasma discharge (20); a cathode (22) placed in the chamber (10) and holding a target (21); and a substrate holder (60) holding a substrate (110) so that one surface of the substrate (110) faces the surface of the target (21). The substrate (110) is arranged at an upper portion in the sputtering apparatus (1) with the surface of the substrate (110) facing downward. The target (21) is arranged at a lower portion in the sputtering apparatus (1) with the surface of the target (21) facing upward. The sputtering apparatus (1) includes a heater (65) for heating the substrate (110). The temperature of the substrate (110) is raised by absorbing electromagnetic waves radiated from the heater (65). A method of manufacturing a semiconductor light-emitting element using the sputtering apparatus is also disclosed.Type: GrantFiled: January 10, 2011Date of Patent: November 11, 2014Assignee: Toyoda Gosei Co., Ltd.Inventors: Hisayuki Miki, Kenzo Hanawa, Yasunori Yokoyama, Yasumasa Sasaki
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Publication number: 20140327037Abstract: A method of manufacturing at least one semiconducting micro- or nano-wire used for formation of an optoelectric structure, optoelectronic structures including the micro- or nano-wires, and a method enabling manufacture of the photoelectronic structures. The method includes providing a semiconducting substrate, forming a crystalline buffer layer on the substrate, the buffer layer having a first zone over at least part of its thickness composed mainly of magnesium nitride in a form MgxNy, and forming at least one semiconducting micro- or nano-wire on the buffer layer.Type: ApplicationFiled: December 19, 2012Publication date: November 6, 2014Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENE ALTInventors: Amelie Dussaigne, Philippe Gilet, Francois Martin
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Publication number: 20140327036Abstract: A light emitting diode (LED) chip includes an N-type semiconductor layer, a compensation layer arranged on the N-type semiconductor layer, an active layer arranged on the compensation layer; and a P-type semiconductor layer arranged on the active layer. During growth of the compensation layer, atoms of an element (i.e., Al) of the compensation layer move to fill epitaxial defects in the N-type semiconductor layer, wherein the epitaxial defects are formed due to lattice mismatch when growing the N-type semiconductor. A method for manufacturing the chip is also disclosed. The compensation layer is made of a compound having a composition of AlxGa1-xN.Type: ApplicationFiled: October 24, 2013Publication date: November 6, 2014Applicant: ADVANCED OPTOELECTRONIC TECHNOLOGY, INC.Inventors: CHING-HSUEH CHIU, YA-WEN LIN, PO-MIN TU, SHIH-CHENG HUANG
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Patent number: 8878233Abstract: Provided are a compound semiconductor device and a manufacturing method thereof. A substrate and a graphene oxide layer are provided on the substrate. A first compound semiconductor layer is provided on the graphene oxide layer. The first compound semiconductor layer is selectively grown from the substrate exposed by the graphene oxide.Type: GrantFiled: October 26, 2011Date of Patent: November 4, 2014Assignee: LG Siltron Inc.Inventors: Sung-Jin An, Dong-Gun Lee, Seok-Han Kim
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Patent number: 8878231Abstract: The present invention provides a light emission device and a manufacturing method thereof. The light emission device includes: i) a substrate; ii) a mask layer disposed on the substrate and having at least one opening; iii) a light emission structure formed on the mask layer surrounding the opening and extended substantially perpendicular to a surface of the substrate; iv) a first electrode formed on the mask layer while surface-contacting the external surface of the light emission structure; and v) a second electrode disposed in the light emission structure and surface-contacting the internal surface of the light emission structure.Type: GrantFiled: May 18, 2010Date of Patent: November 4, 2014Assignee: SNU R&DB FoundationInventors: Gyu-Chul Yi, Chul-Ho Lee
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Patent number: 8878198Abstract: An organic light-emitting display apparatus includes a substrate including a plurality of red, green, and blue sub-pixel regions, a pixel electrode in each of the plurality of the red, green, and blue sub-pixel regions on the substrate, a Distributed Bragg Reflector (DBR) layer between the substrate and the pixel electrodes, a high-refractive index layer between the substrate and the DBR layer in the blue sub-pixel region, the high-refractive index layer having a smaller area than an area of a corresponding pixel electrode in the blue sub-pixel region, an intermediate layer including an emissive layer on the pixel electrode, and an opposite electrode on the intermediate layer.Type: GrantFiled: August 22, 2012Date of Patent: November 4, 2014Assignee: Samsung Display Co., Ltd.Inventors: Jong-Hyun Choi, Dong-Hyun Lee, Dae-Woo Lee, Seong-Hyun Jin, Guang-Hai Jin
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Patent number: 8878232Abstract: An MQW-structure light-emitting layer is formed by alternately stacking InGaN well layers and AlGaN barrier layers. Each well layer and each barrier layer are formed so as to satisfy the following relations: 12.9??2.8x+100y?37 and 0.65?y?0.86, or to satisfy the following relations: 162.9?7.1x+10z?216.1 and 3.1?z?9.2, here x represents the Al compositional ratio (mol %) of the barrier layer, and y represents the difference in bandgap energy (eV) between the barrier layer and the well layer, and z represents the In compositional ratio (mol %) of the well layer.Type: GrantFiled: June 19, 2012Date of Patent: November 4, 2014Assignee: Toyoda Gosei Co., Ltd.Inventor: Ryo Nakamura
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Patent number: 8878212Abstract: A light emitting device includes a substrate, at least one electrode, a first contact layer, a second contact layer, a light emitting structure layer, and an electrode layer. The electrode is disposed through the substrate. The first contact layer is disposed on a top surface of the substrate and electrically connected to the electrode. The second contact layer is disposed on a bottom surface of the substrate and electrically connected to the electrode. The light emitting structure layer is disposed above the substrate at a distance from the substrate and electrically connected to the first contact layer. The light emitting structure layer includes a first conductive type semiconductor layer, an active layer, and a second conductive type semiconductor layer. The electrode layer is disposed on the light emitting structure layer.Type: GrantFiled: February 3, 2011Date of Patent: November 4, 2014Assignee: LG Innotek Co., Ltd.Inventors: Woo Sik Lim, Sung Kyoon Kim, Sung Ho Choo, Hee Young Beom
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Patent number: 8878208Abstract: An illuminating device that may include a substrate; a first light emitting chip which is disposed on the substrate; a second light emitting chip which is spaced apart from the first light emitting chip and is disposed on the substrate; a first lens which includes a first cylindrical side having a height greater than the thickness of the first light emitting chip and includes a first spherical or hemispherical curved surface formed on the first side, and which surrounds the first light emitting chip; and a second lens which includes a second cylindrical side having a height greater than the thickness of the second light emitting chip and includes a second spherical or hemispherical curved surface formed on the second side, and which surrounds the second light emitting chip, wherein at least a portion of the first side contacts with at least a portion of the second side.Type: GrantFiled: February 13, 2013Date of Patent: November 4, 2014Assignee: LG Innotek Co., Ltd.Inventors: Ki Hyun Kim, Eun Hwa Kim
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Patent number: 8872217Abstract: Electronic devices involving contact structures, and related components, systems and methods associated therewith are described. The contact structures are particularly suitable for use in a variety of light-emitting devices, including LEDs.Type: GrantFiled: April 16, 2012Date of Patent: October 28, 2014Assignee: Luminus Devices, Inc.Inventors: Michael Gregory Brown, Yves Bertic, Scott W. Duncan, Hong Lu, Ravi Rajan, John Woodhouse, Feng Yun, Hao Zhu
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Publication number: 20140312381Abstract: The present invention relates to semiconductor devices comprising semiconductor nanoelements. In particular the invention relates to devices having a volume element having a larger diameter than the nanoelement arranged in epitaxial connection to the nanoelement. The volume element is being doped in order to provide a high charge carrier injection into the nanoelement and a low access resistance in an electrical connection. The nanoelement may be upstanding from a semiconductor substrate. A concentric layer of low resistivity material forms on the volume element forms a contact.Type: ApplicationFiled: July 3, 2014Publication date: October 23, 2014Inventors: Lars Ivar Samuelson, Patrik Svensson, Jonas Ohlsson, Truls Lowgren
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Patent number: 8866146Abstract: A method (100) of fabricating an LED or the active regions of an LED and an LED (200). The method includes growing, depositing or otherwise providing a bottom cladding layer (208) of a selected semiconductor alloy with an adjusted bandgap provided by intentionally disordering the structure of the cladding layer (208). A first active layer (202) may be grown above the bottom cladding layer (208) wherein the first active layer (202) is fabricated of the same semiconductor alloy, with however, a partially ordered structure. The first active layer (202) will also be fabricated to include a selected n or p type doping. The method further includes growing a second active layer (204) above the first active layer (202) where the second active layer (204) Is fabricated from the same semiconductor alloy.Type: GrantFiled: April 15, 2010Date of Patent: October 21, 2014Assignee: Alliance for Sustainable Energy, LLCInventors: Angelo Mascarenhas, Myles A. Steiner, Lekhnath Bhusal, Yong Zhang
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Patent number: 8866186Abstract: The present invention aims to enhance the light extraction efficiency of the Group III nitride semiconductor light-emitting device. The inventive Group III nitride semiconductor light-emitting device comprises a substrate; and a Group III nitride semiconductor layer including a light-emitting layer, stacked on the substrate, wherein the side face of the Group III nitride semiconductor layer is tilted with respect to the normal line of the major surface of the substrate.Type: GrantFiled: September 20, 2006Date of Patent: October 21, 2014Assignee: Toyoda Gosei Co., Ltd.Inventors: Gaku Oriji, Koji Kamei, Hisayuki Miki, Akihiro Matsuse
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Patent number: 8866149Abstract: A method for the reuse of gallium nitride (GaN) epitaxial substrates uses band-gap-selective photoelectrochemical (PEC) etching to remove one or more epitaxial layers from bulk or free-standing GaN substrates without damaging the substrate, allowing the substrate to be reused for further growth of additional epitaxial layers. The method facilitates a significant cost reduction in device production by permitting the reuse of expensive bulk or free-standing GaN substrates.Type: GrantFiled: February 14, 2013Date of Patent: October 21, 2014Assignee: The Regents of the University of CaliforniaInventors: Casey O. Holder, Daniel F. Feezell, Steven P. DenBaars, Shuji Nakamura
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Patent number: 8866135Abstract: An anthracene derivative represented by the following formula (1): In the formula (1), Z is a structure represented by the following formula (2).Type: GrantFiled: November 29, 2013Date of Patent: October 21, 2014Assignee: Idemitsu Kosan Co., Ltd.Inventors: Masahiro Kawamura, Chishio Hosokawa, Masaki Numata
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Publication number: 20140306265Abstract: The sapphire substrate has a principal surface for growing a nitride semiconductor to form a nitride semiconductor light emitting device and comprising a plurality of projections of the principal surface, wherein an outer periphery of a bottom surface of each of the projections has at least one depression. This depression is in the horizontal direction. The plurality of projections are arranged so that a straight line passes through the inside of at least any one of projections when the straight line is drawn at any position in any direction in a plane including the bottom surfaces of the plurality of projections.Type: ApplicationFiled: June 25, 2014Publication date: October 16, 2014Inventors: Junya NARITA, Takuya Okada, Yohei Wakai, Yoshiki Inoue, Naoya Sako, Katsuyoshi Kadan
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Patent number: 8859400Abstract: Semiconductor structures comprising a III-nitride (e.g., gallium nitride) material region and methods associated with such structures are provided. In some embodiments, the structures include an electrically conductive material (e.g., gold) separated from certain other region(s) of the structure (e.g., a silicon substrate) by a barrier material in order to limit, or prevent, undesirable reactions between the electrically conductive material and the other component(s) which can impair device performance. In certain embodiments, the electrically conductive material may be formed in a via. For example, the via can extend from a topside of the device to a backside so that the electrically conductive material connects a topside contact to a backside contact. The structures described herein may form the basis of a number of semiconductor devices including transistors (e.g., FET), Schottky diodes, light-emitting diodes and laser diodes, amongst others.Type: GrantFiled: December 28, 2012Date of Patent: October 14, 2014Assignee: International Rectifier CorporationInventors: Robert J. Therrien, Jerry W. Johnson, Allen W. Hanson
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Patent number: 8860051Abstract: This invention is related to LED Light Extraction for optoelectronic applications. More particularly the invention relates to (Al, Ga, In)N combined with optimized optics and phosphor layer for highly efficient (Al, Ga, In)N based light emitting diodes applications, and its fabrication method. A further extension is the general combination of a shaped high refractive index light extraction material combined with a shaped optical element.Type: GrantFiled: November 15, 2007Date of Patent: October 14, 2014Assignee: The Regents of the University of CaliforniaInventors: Natalie N. Fellows, Steven P. DenBaars, Shuji Nakamura
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Patent number: 8860050Abstract: Provided is a hybrid light emitting device. The hybrid light emitting device may include the first light emitting part on the substrate, the capping layer, and the second light emitting part. The first light emitting part may emit light having a first wavelength, and the first light emitting part may include a first electrode, an organic emitting layer, and a second electrode sequentially disposed. A second light emitting part may generate light having a second wavelength. A capping layer may be disposed between the organic emitting layer and the second light emitting part. The capping layer may reflect light having the first wavelength and transmit light having the second wavelength.Type: GrantFiled: March 1, 2013Date of Patent: October 14, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Jun-Han Han, Jeong Ik Lee, Chul Woong Joo, Jin Woo Huh, Jaehyun Moon, Seung Koo Park, Joon Tae Ahn, Boong Joon Lee, Nam Sung Cho, Doo-Hee Cho, Joo Hyun Hwang, Jin Wook Shin, Hye Yong Chu
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Patent number: 8853715Abstract: A first light-emitting layer of a first organic electroluminescent element is disposed in common to a second organic electroluminescent element, a second light-emitting layer of the second organic electroluminescent element is disposed in contact with the first light-emitting layer and in the cathode side, and the second light-emitting layer is a light-emitting layer having an electron trapping property.Type: GrantFiled: August 27, 2012Date of Patent: October 7, 2014Assignee: Canon Kabushiki KaishaInventor: Yojiro Matsuda
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Patent number: 8852756Abstract: The present invention relates to the improvement of organic electroluminescent devices, in particular blue-emitting devices, by using compounds of the formula (1) as dopants in the emitting layer.Type: GrantFiled: April 21, 2006Date of Patent: October 7, 2014Assignee: Merck Patent GmbHInventors: Horst Vestweber, Holger Heil, Philipp Stoessel, Arne Buesing, Amir Hossain Parham, Rocco Fortte
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Patent number: 8852757Abstract: Disclosed is an organic electroluminescent device having high external quantum efficiency and long emission life. Also disclosed are an illuminating device and a display, each comprising such an organic electroluminescent device. The organic electroluminescent device is characterized by comprising at least an anode and a cathode on a supporting substrate, while having at least one light-emitting layer between the anode and the cathode. The organic electroluminescent device is also characterized by containing a polymer which at least partially contains a compound A having a partial structure represented by the general formula (a) below and a reactive group, and is obtained by polymerizing the compound A through the reactive group. (In the formula, Ar1 and Ar2 respectively represent an aromatic ring.Type: GrantFiled: August 27, 2007Date of Patent: October 7, 2014Assignee: Konica Minolta Holdings, Inc.Inventors: Rie Katakura, Hiroshi Kita, Tatsuo Tanaka, Hideo Taka
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Patent number: 8853728Abstract: An LED mounting substrate includes a base substrate, a conductive pattern formed on the base substrate and including a recessed portion on an upper surface thereof, and a light reflecting film formed in an inter-pattern gap of the conductive pattern on the base substrate and in the recessed portion of the conductive pattern.Type: GrantFiled: June 17, 2013Date of Patent: October 7, 2014Assignee: Toyoda Gosei Co., Ltd.Inventors: Yosuke Tsuchiya, Shota Shimonishi, Hiroyuki Tajima, Akira Sengoku
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Patent number: 8853710Abstract: An optically active material is used to create power devices and circuits having significant performance advantages over conventional methods for affecting optical control of power electronics devices and circuits. A silicon-carbide optically active material is formed by compensating shallow donors with the boron related D-center. The resulting material can be n-type or p-type but it is distinguished from other materials by the ability to induce persistent photoconductivity in it when illuminated by electromagnetic radiation with a photon energy in excess of the threshold energy required to photoexcite electrons from the D-center to allowed states close to the conduction band edge, which varies from polytype to polytype.Type: GrantFiled: June 3, 2013Date of Patent: October 7, 2014Assignee: Power Integrations, Inc.Inventor: Michael S. Mazzola
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Publication number: 20140291694Abstract: A nonpolar III-nitride film grown on a miscut angle of a substrate, in order to suppress the surface undulations, is provided. The surface morphology of the film is improved with a miscut angle towards an a-axis direction comprising a 0.15° or greater miscut angle towards the a-axis direction and a less than 30° miscut angle towards the a-axis direction.Type: ApplicationFiled: June 16, 2014Publication date: October 2, 2014Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Asako Hirai, Zhongyuan Jia, Makoto Saito, Hisashi Yamada, Kenji Iso, Steven P. DenBaars, Shuji Nakamura, James S. Speck
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Publication number: 20140295589Abstract: An optoelectronic component includes a semiconductor layer sequence having an optoelectronically active region; a dielectric layer on the semiconductor layer sequence; and a metal layer on the dielectric layer, wherein an adhesion layer is arranged between the dielectric layer and the metal layer, the adhesion layer being covalently bonded to the dielectric layer and to the metal layer.Type: ApplicationFiled: July 23, 2012Publication date: October 2, 2014Applicant: OSRAM Opto Semiconductors GmbHInventors: Gudrun Lindberg, Lutz Höppel, Heribert Zull
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Patent number: 8845927Abstract: A nanoparticle has a semiconductor nanocrystal capable of emitting light. The nanoparticle further includes a ligand attached to a surface of the coating. The ligand is represented by the formula: X-Sp-Z, wherein X represents, e.g., a primary amine group, a secondary amine group, a urea, a thiourea, an imidizole group, an amide group, a phosphonic or arsonic acid group, a phosphinic or arsinic acid group, a phosphate or arsenate group, a phosphine or arsine oxide group; Sp represents a spacer group, such as a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) reactive group capable of communicating specific chemical properties to the nanocrystal as well as provide specific chemical reactivity to the surface of the nanocrystal, and/or (ii) a group that is cyclic, halogenated, or polar a-protic.Type: GrantFiled: March 11, 2010Date of Patent: September 30, 2014Assignee: QD Vision, Inc.Inventors: Craig Breen, Marshall Cox, Jonathan S. Steckel
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Patent number: 8846482Abstract: A method of forming a doped region in a III-nitride substrate includes providing the III-nitride substrate and forming a masking layer having a predetermined pattern and coupled to a portion of the III-nitride substrate. The III-nitride substrate is characterized by a first conductivity type and the predetermined pattern defines exposed regions of the III-nitride substrate. The method also includes heating the III-nitride substrate to a predetermined temperature and placing a dual-precursor gas adjacent the exposed regions of the III-nitride substrate. The dual-precursor gas includes a nitrogen source and a dopant source. The method further includes maintaining the predetermined temperature for a predetermined time period, forming p-type III-nitride regions adjacent the exposed regions of the III-nitride substrate, and removing the masking layer.Type: GrantFiled: September 22, 2011Date of Patent: September 30, 2014Assignee: Avogy, Inc.Inventors: David P. Bour, Richard J. Brown, Isik C. Kizilyalli, Thomas R. Prunty, Linda Romano, Andrew P. Edwards, Hui Nie, Mahdan Raj
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Patent number: 8841691Abstract: A method of fabricating a Light Emitting Diode with improved light extraction efficiency, comprising depositing a plurality of Zinc Oxide (ZnO) nanorods on one or more surfaces of a III-Nitride based LED, by growing the ZnO nanorods from an aqueous solution, wherein the surfaces are different from c-plane surfaces of III-Nitride and transmit light generated by the LED.Type: GrantFiled: August 19, 2013Date of Patent: September 23, 2014Assignee: The Regents of the University of CaliforniaInventors: Jacob J. Richardson, Daniel B. Thompson, Ingrid Koslow, Jun-Seok Ha, Frederick F. Lange, Steven P. DenBaars, Shuji Nakamura
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Publication number: 20140264429Abstract: Protrusions 2 each having a shape of a pyramid or a truncated pyramid are regularly arranged on a growing face 1a of a seed crystal 1 composed of gallium nitride single crystal. It is formed a gallium nitride crystal layer 4 having a thickness of 100 ?m or smaller by flux method directly on the growing face 1a of the seed crystal.Type: ApplicationFiled: May 28, 2014Publication date: September 18, 2014Applicant: NGK INSULATORS, LTD.Inventors: Shuuhei Higashihara, Makoto Iwai
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Publication number: 20140264430Abstract: The current distribution across the p-layer (130) of a semiconductor device is modified by purposely inhibiting current flow through the p-layer (130) in regions (310) adjacent to the guardsheet (150), without reducing the optical reflectivity of any part of the device. This current flow may be inhibited by increasing the resistance of the p-layer that is coupled to the p-contact (140) along the edges and in the corners of contact area. In an example embodiment, the high-resistance region (130) is produced by a shallow dose of hydrogen-ion (H+) implant after the p-contact (140) is created. Similarly, a resistive coating may be applied in select regions between the p-contact and the p-layer.Type: ApplicationFiled: October 29, 2012Publication date: September 18, 2014Applicant: KONINKLIJKE PHILPS N.V.Inventor: John Edward Epler
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Patent number: 8835973Abstract: Light-emitting elements in which an increase of driving voltage can be suppressed are provided. Light-emitting devices whose power consumption is reduced by including such light-emitting elements are also provided. In a light-emitting element having an EL layer between an anode and a cathode, a first layer in which carriers can be produced is formed between the cathode and the EL layer and in contact with the cathode, a second layer which transfers electrons produced in the first layer is formed in contact with the first layer, and a third layer which injects the electrons received from the second layer into the EL layer is formed in contact with the second layer.Type: GrantFiled: March 8, 2012Date of Patent: September 16, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiromi Nowatari, Satoshi Seo, Nobuharu Ohsawa, Tetsuo Tsutsui
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Patent number: 8835969Abstract: Disclosed are a light emitting device package and a lighting system. The light emitting device package includes a body including a cavity and formed in a transmittive material; a plurality of lead electrodes in the cavity; an isolation member disposed between the lead electrodes; a light emitting device electrically connected to the lead electrodes in the cavity; and a molding member on the light emitting device.Type: GrantFiled: August 29, 2013Date of Patent: September 16, 2014Assignee: LG Innotek Co., Ltd.Inventor: Ji Won Jang
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Patent number: 8835930Abstract: A gallium nitride rectifying device includes a p-type gallium nitride based semiconductor layer and an n-type gallium nitride based semiconductor layer, the two layers forming a pn junction with each other. The p-type gallium nitride based semiconductor layer has a carrier trap (level) density of not more than 1×1018 cm?3, or the n-type gallium nitride based semiconductor layer has a carrier trap (level) density of not more than 1×1016 cm?3.Type: GrantFiled: March 21, 2012Date of Patent: September 16, 2014Assignee: Hitachi Metals, Ltd.Inventors: Tadayoshi Tsuchiya, Naoki Kaneda, Tomoyoshi Mishima
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Patent number: 8835200Abstract: A III-nitride light emitting diode (LED) and method of fabricating the same, wherein at least one surface of a semipolar or nonpolar plane of a III-nitride layer of the LED is textured, thereby forming a textured surface in order to increase light extraction. The texturing may be performed by plasma assisted chemical etching, photolithography followed by etching, or nano-imprinting followed by etching.Type: GrantFiled: January 12, 2012Date of Patent: September 16, 2014Assignee: The Regents of the University of CaliforniaInventors: Hong Zhong, Anurag Tyagi, Kenneth J. Vampola, James S. Speck, Steven P. DenBaars, Shuji Nakamura
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Patent number: 8835943Abstract: A light-emitting element includes: an anode; a cathode; a light-emitting layer which is provided between the anode and the cathode and emits light as the anode and the cathode are electrically connected to each other; and an organic layer which is provided between the anode and the light-emitting layer to come in contact with both layers. The organic layer has a first function of transporting holes and a second function of preventing electrons infiltrating from the light-emitting layer from staying in the organic layer.Type: GrantFiled: September 6, 2011Date of Patent: September 16, 2014Assignee: Seiko Epson CorporationInventors: Hidetoshi Yamamoto, Tetsuji Fujita, Koya Shiratori
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Patent number: 8835018Abstract: An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (8) are provided. Further, by use of the anthracene derivative represented by the general formula (1), a light-emitting element with high emission efficiency can be obtained. Furthermore, by use of the anthracene derivative represented by the general formula (1), a light-emitting element that emits blue light with high color purity can be obtained.Type: GrantFiled: March 25, 2008Date of Patent: September 16, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Sachiko Kawakami, Nobuharu Ohsawa
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Patent number: 8835959Abstract: A transparent light emitting diode (LED) includes a plurality of III-nitride layers, including an active region that emits light, wherein all of the layers except for the active region are transparent for an emission wavelength of the light, such that the light is extracted effectively through all of the layers and in multiple directions through the layers. Moreover, the surface of one or more of the III-nitride layers may be roughened, textured, patterned or shaped to enhance light extraction.Type: GrantFiled: September 19, 2012Date of Patent: September 16, 2014Assignee: The Regents of the University of CaliforniaInventors: Shuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
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Patent number: 8835950Abstract: A semiconductor device has an active layer, a first semiconductor layer of first conductive type, an overflow prevention layer disposed between the active layer and the first semiconductor layer, which is doped with impurities of first conductive type and which prevents overflow of electrons or holes, a second semiconductor layer of first conductive type disposed at least one of between the active layer and the overflow prevention layer and between the overflow prevention layer and the first semiconductor layer, and an impurity diffusion prevention layer disposed between the first semiconductor layer and the active layer, which has a band gap smaller than those of the overflow prevention layer, the first semiconductor layer and the second semiconductor layer and which prevents diffusion of impurities of first conductive type.Type: GrantFiled: February 16, 2012Date of Patent: September 16, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Koichi Tachibana, Chie Hongo, Hajime Nago, Shinya Nunoue
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Patent number: 8829337Abstract: Novel structures of photovoltaic cells (also treated as solar cells) are provided. The cells are based on nanometer-scaled wires, tubes, and/or rods, which are made of electronic materials covering semiconductors, insulators or metallic in structure. These photovoltaic cells have large power generation capability per unit physical area over the conventional cells. These cells will have enormous applications in space, commercial, residential, and industrial applications.Type: GrantFiled: October 8, 2012Date of Patent: September 9, 2014Assignee: Banpil Photonics, Inc.Inventor: Achyut Kumar Dutta
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Patent number: 8829546Abstract: A solid state light emitting device comprising an emitter structure having an active region of semiconductor material and a pair of oppositely doped layers of semiconductor material on opposite sides of the active region. The active region emits light at a predetermined wavelength in response to an electrical bias across the doped layers. An absorption layer of semiconductor material is included that is integral to said emitter structure and doped with at least one rare earth or transition element. The absorption layer absorbs at least some of the light emitted from the active region and re-emits at least one different wavelength of light. A substrate is included with the emitter structure and absorption layer disposed on the substrate.Type: GrantFiled: February 13, 2006Date of Patent: September 9, 2014Assignee: Cree, Inc.Inventors: Steven P. DenBaars, Eric J. Tarsa, Michael Mack, Bernd Keller, Brian Thibeault, Adam W. Saxler
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Patent number: 8829559Abstract: In a nitride semiconductor light-emitting device having an n-side and a p-side electrode pad formed on the same side of a substrate wherein current distribution in the light-emitting device is improved by forming branch electrodes extended from the p-side electrode pad (and the n-side electrode pad), when sheet resistance values of n-side and p-side layers in the device are low enough, contact resistance between a p-type nitride semiconductor layer and a current diffusion layer of a transparent conductive film formed thereon is reduced and in-plane distribution of the sheet resistance is made uniform whereby improving the optical output, by increasing in a prescribed condition the sheet resistance value of the current diffusion layer.Type: GrantFiled: March 29, 2012Date of Patent: September 9, 2014Assignee: Sharp Kabushiki KaishaInventors: Yufeng Weng, Michael Brockley
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Patent number: 8829491Abstract: According to example embodiments, a semiconductor device includes a first layer and second layer. The first layer includes a nitride semiconductor doped with a first type dopant. The second layer is below the first layer and includes a high concentration layer. The high concentration layer includes the nitride semiconductor doped with the first type dopant and has a doping concentration higher than a doping concentration of the first layer.Type: GrantFiled: May 31, 2011Date of Patent: September 9, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-won Lee, Jun-youn Kim, Young-jo Tak
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Patent number: 8829541Abstract: Provided are a light emitting device, a light emitting device package, and a lighting system. The light emitting device includes a crystalline substrate having a plurality of side surfaces, a light emitting structure layer comprising a first conductive type semiconductor layer, an active layer, and a second conductive type semiconductor layer on the substrate, and a first electrode on the first conductive type semiconductor layer and a second electrode on the second conductive type semiconductor layer. An amorphous region is defined in a side surface of the substrate, and the amorphous regions of two sides adjacent to each other have different depths from a top surface of the substrate.Type: GrantFiled: June 20, 2011Date of Patent: September 9, 2014Assignee: LG Innotek Co., Ltd.Inventors: MyeongSoo Kim, SungKyoon Kim, Woo Sik Lim, Sung Ho Choo, Hee Young Beom, Min Gyu Na