Comprising Resonant Cavity Structure (e.g., Bragg Reflector Pair) (epo) Patents (Class 257/E33.069)
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Publication number: 20120077294Abstract: A surface emitting photonic device including a substrate; and a waveguide structure on the substrate. The waveguide structure includes an active region along its longitudinal axis and the active region is for generating light. The waveguide structure also has a trench formed therein transverse to the active region and defining a first wall forming an angled facet at one end of the active region, the first wall having a normal that is at a non-parallel angle relative to the longitudinal axis of the waveguide structure. The trench also defines a second wall located opposite the first wall.Type: ApplicationFiled: October 14, 2011Publication date: March 29, 2012Applicant: BinOptics CorporationInventors: Alex Behfar, Cristian Stagarescu
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Patent number: 8143631Abstract: A layered structure for use with a high power light emitting diode system comprises an electrically insulating intermediate layer interconnecting a top layer and a bottom layer. The top layer, the intermediate layer, and the bottom layer form an at least semi-flexible elongate member having a longitudinal axis and a plurality of positions spaced along the longitudinal axis. The at least semi-flexible elongate member is bendable laterally proximate the plurality of positions spaced along the longitudinal axis to a radius of at least 6 inches, twistable relative to its longitudinal axis up to 10 degrees per inch, and bendable to conform to localized heat sink surface flatness variations having a radius of at least 1 inch. The top layer is pre-populated with electrical components for high wattage, the electrical components including at least one high wattage light emitting diode at least 1.0 Watt per 0.8 inch squared.Type: GrantFiled: March 6, 2008Date of Patent: March 27, 2012Assignee: Metrospec Technology LLCInventors: Wm. Todd Crandell, Anthony Mitchell Johnson, Tony Stephen Schweitzer, H. Vic Holec
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Publication number: 20120068217Abstract: A light emitting device includes an active layer; at least a portion of the active layer constitutes a gain region. The gain region is continuous from a first end surface and a second end surface. The gain region includes a first portion extending from the first end surface to a first reflective surface in a direction tilted with respect to a normal to the first side surface as viewed two-dimensionally; a second portion extending from the second end surface to the second reflective surface in a direction tilted with respect to a normal to the first side surface as viewed two-dimensionally; and a third portion extending from the first reflective surface to the second reflective surface in a direction tilted with respect to a normal to the first reflective surface as viewed two-dimensionally.Type: ApplicationFiled: November 30, 2011Publication date: March 22, 2012Applicant: SEIKO EPSON CORPORATIONInventor: Masamitsu MOCHIZUKI
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Publication number: 20120056152Abstract: In one aspect of the invention, a light emitting device includes an epi layer having multiple layers of semiconductors formed on a substrate, a first electrode and a second electrode having opposite polarities with each other, and electrically coupled to corresponding semiconductor layers, respectively, of the epi layer, and a rod structure formed on the epi layer. The rod structure includes a plurality of rods distanced from each other.Type: ApplicationFiled: September 7, 2010Publication date: March 8, 2012Applicant: CHI MEI LIGHTING TECHNOLOGY CORPORATIONInventors: Meng Hsin Li, Kuo Hui Yu, Tsung-Hung Lu, Ming-Ji Tsai, Chang Hsin Chu
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Publication number: 20120058582Abstract: A method for etching an insulating film includes the steps of forming an insulating film; forming a first resin layer composed of a non-silicon-containing resin on the insulating film; forming a pattern including projections and recesses in the first resin layer; forming a second resin layer composed of a silicon-containing resin to cover the projections and the recesses of the pattern in the first resin layer; etching the second resin layer by reactive ion etching with etching gas containing CF4 gas and oxygen gas until the projections of the first resin layer are exposed, a Si component of the second resin layer being oxidized in etching the second resin layer; selectively etching the first resin layer until the insulating film is exposed using as a mask the second resin layer buried in the recesses of the first resin layer to form a resin layer mask; and etching the insulating film using the resin layer mask.Type: ApplicationFiled: September 1, 2011Publication date: March 8, 2012Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Yukihiro TSUJI
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Publication number: 20120050694Abstract: A light emitting unit array including a plurality of micro-light emitting diodes (?-LEDs) is provided. The micro-light emitting diodes are arranged in an array on a substrate, and each of the micro-light emitting diodes includes a reflection layer, a light emitting structure, and a light collimation structure. The light emitting structure is disposed on the reflection layer, and includes a first type doped semiconductor layer, an active layer, and a second type doped semiconductor layer that are stacked sequentially. At least a portion of the first type doped semiconductor layer, the active layer, and the second type doped semiconductor layer are sandwiched between the reflection layer and the light collimation structure.Type: ApplicationFiled: August 26, 2011Publication date: March 1, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chen-Yang Huang, Chia-Hsin Chao, Wen-Yung Yeh
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Publication number: 20120043527Abstract: According to embodiments of the present invention, a light emitting device is provided. The light emitting device includes: an active region comprising at least one p-i-n junction, the at least one p-i-n junction comprising a p-doped region, an intrinsic region and an n-doped region; a first contact; and a second contact, wherein the active region is disposed between the first contact and the second contact; and wherein a voltage applied to the first contact and the second contact produces a current configured to flow between the first contact and the second contact in a direction substantially parallel to a surface of the intrinsic region of the active region configured to emit a light. According to embodiments of the present invention, the intrinsic region includes a multiple quantum well (MQW) such that a current injected flows laterally in a direction substantially parallel to the surface of the wells of the MQW.Type: ApplicationFiled: August 19, 2010Publication date: February 23, 2012Inventors: Liang Ding, Mingbin Yu, Guo Qiang Patrick Lo
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Patent number: 8115226Abstract: An electrode structure is disclosed for enhancing the brightness and/or efficiency of an LED. The electrode structure can have a metal electrode and an dielectric material formed intermediate the electrode and a light emitting semiconductor material. Electrical continuity between the semiconductor material and the metal electrode is provided by an optically transmissive ohmic contact layer, such as a layer of Indium Tin Oxide. The metal electrode thus can be physically separated from the semiconductor material by one or more of the dielectric material and the ohmic contact layer. The dielectric layer can increase total internal reflection of light at the interface between the semiconductor and the dielectric layer, which can reduce absorption of light by the electrode. Such LED can have enhanced utility and can be suitable for uses such as general illumination.Type: GrantFiled: September 22, 2010Date of Patent: February 14, 2012Assignee: Bridgelux, Inc.Inventors: Frank T. Shum, William W. So, Steven D. Lester
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Publication number: 20120025244Abstract: Exemplary embodiments of the present invention provide light-emitting diodes having a distributed Bragg reflector. A light-emitting diode (LED) according to an exemplary embodiment includes a light-emitting structure arranged on a first surface of a substrate, the light-emitting structure including a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, and an active layer interposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer. A first distributed Bragg reflector is arranged on a second surface of the substrate opposite to the first surface, the first distributed Bragg reflector to reflect light emitted from the light-emitting structure. The first distributed Bragg reflector has a reflectivity of at least 90% with respect to light of a first wavelength in a blue wavelength range, light of a second wavelength in a green wavelength range, and light of a third wavelength in a red wavelength range.Type: ApplicationFiled: May 4, 2011Publication date: February 2, 2012Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Duk Il SUH, Jae Moo KIM, Kyoung Wan KIM, Yeo Jin YOON, Ye Seul KIM, Sang Hyun OH, Jin Woong LEE
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Publication number: 20120027348Abstract: An optical apparatus includes an optical fiber formed of a core surrounded by cladding, in which the optical fiber includes an end portion. In addition, an optical layer composed of a material having a relatively high refractive index is positioned on the end portion, in which the optical layer includes a non-periodic sub-wavelength grating positioned in optical communication with the core.Type: ApplicationFiled: July 30, 2010Publication date: February 2, 2012Inventors: David A. Fattal, Marco Florentino, Jingjing Li, Raymond G. Beausoleil
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Publication number: 20120018749Abstract: An organic light emitting display apparatus is manufactured using a simplified manufacturing process and prevents or reduces the formation of dark spots. The organic light emitting display apparatus includes: red, green, and blue sub-pixel regions, each including a first electrode on a substrate; a distributed Bragg reflector (DBR) layer between the substrate and the first electrode; a hole injection layer on the DBR layer and covering the first electrode; a hole transport layer on the hole injection layer; an auxiliary layer between the hole injection layer and the hole transport layer in the green sub-pixel region; a green light-emission layer on the hole transport layer in the blue and green sub-pixel regions; a blue light-emission layer on the green light-emission layer in the blue sub-pixel region; and a red light-emission layer on the hole transport layer in the red sub-pixel region.Type: ApplicationFiled: July 19, 2011Publication date: January 26, 2012Inventors: Sang-Pil Lee, Young-Rok Song, Jung-Bae Song, Beom-Rak Choi
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Patent number: 8093607Abstract: An optoelectronic semiconductor component, comprising a carrier substrate, and an interlayer that mediates adhesion between the carrier substrate and a component structure. The component structure comprises an active layer provided for generating radiation, and a useful layer arranged between the interlayer and the active layer. The useful layer has a separating area remote from the carrier substrate.Type: GrantFiled: April 25, 2007Date of Patent: January 10, 2012Assignee: OSRAM Opto Semiconductors GmbHInventors: Christoph Eichler, Stephan Miller, Uwe Strauss, Volker Härle, Matthias Sabathil
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Patent number: 8093606Abstract: There is provided a nitride semiconductor light emitting device having a light reflection layer capable of preventing reflectivity from lowering and luminance from lowering due to deterioration of quality of an active layer. A nitride semiconductor laser includes at least a light emitting layer forming portion (3) provided on a first light reflection layer (2) provided on a substrate (1). The first light reflection layer (2) is formed with laminating a low refractivity layer (21) and a high refractivity layer (22) which have a different refractivity from each other, and the low refractivity layer (21) of the first light reflection layer is formed with a single layer structure of an AlxGa1?xN layer (0?x?1), and the high refractivity layer (22) of the first light reflection layer is formed with a multi layer structure formed by laminating alternately an AlyGa1?yN layer (0?y?0.5 and y<x) or an IntGa1?tN layer (0<t?0.5) and an InuGa1?uN layer (0<u?1 and t<u).Type: GrantFiled: November 28, 2006Date of Patent: January 10, 2012Assignee: Rohm Co., Ltd.Inventors: Masayuki Sonobe, Norikazu Ito, Mitsuhiko Sakai
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Patent number: 8093685Abstract: A nitride compound semiconductor element according to the present invention is a nitride compound semiconductor element including a substrate 1 having an upper face and a lower face and a semiconductor multilayer structure 40 supported by the upper face of the substrate 1, such that the substrate 1 and the semiconductor multilayer structure 40 have at least two cleavage planes. At least one cleavage inducing member 3 which is in contact with either one of the two cleavage planes is provided, and a size of the cleavage inducing member 3 along a direction parallel to the cleavage plane is smaller than a size of the upper face of the substrate 1 along the direction parallel to the cleavage plane.Type: GrantFiled: October 13, 2005Date of Patent: January 10, 2012Assignee: Panasonic CorporationInventors: Naomi Anzue, Toshiya Yokogawa, Yoshiaki Hasegawa
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Patent number: 8089088Abstract: A light emitting device includes an active layer; at least a portion of the active layer constitutes a gain region. The gain region is continuous from a first end surface and a second end surface. The gain region has a first reflective surface and a second reflective surface for reflecting light generated by the gain region. The first reflective surface and second reflective surface extend from the first end surface to the second end surface.Type: GrantFiled: January 14, 2010Date of Patent: January 3, 2012Assignee: Seiko Epson CorporationInventor: Masamitsu Mochizuki
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Publication number: 20110317540Abstract: A vertical cavity surface emitting laser including a substrate, a first semiconductor multilayer film reflector formed on the substrate, an active region formed on the first semiconductor multilayer film reflector, a second semiconductor multilayer film reflector formed on the active region, an electrode formed on the second semiconductor multilayer film reflector, a light absorption layer, and a light transmission layer. In the electrode, a light emitting aperture is formed. The light absorption layer is formed in a peripheral region of the light emitting aperture, and absorbs emitted light. The light transmission layer is composed of a material which the emitted light can pass through, and formed in a central region of the light emitting aperture. Thicknesses of the light absorption layer and the light transmission layer are selected so that phases of light from the light absorption layer and from the light transmission layer are adjusted.Type: ApplicationFiled: October 18, 2010Publication date: December 29, 2011Applicant: FUJI XEROX CO., LTD.Inventors: Kazuyuki MATSUSHITA, Takashi KONDO, Kazutaka TAKEDA
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Publication number: 20110293216Abstract: Novel integrated electro-optic structures such as modulators and switches and methods for fabrication of the same are disclosed in a variety of embodiments. In an illustrative embodiment, a device includes a substrate with a waveguide and an optical resonator comprising polycrystalline silicon positioned on the substrate. First and second doped semiconducting regions also comprise polycrystalline silicon and are positioned proximate to the first optical resonator. The first optical resonator is communicatively coupled to the waveguide.Type: ApplicationFiled: March 16, 2011Publication date: December 1, 2011Applicant: Cornell UniversityInventors: Michal Lipson, Sasikanth Manipatruni, Kyle Preston, Bradley Schmidt
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Patent number: 8067255Abstract: Provided are a nitride semiconductor light emitting device including a coat film formed at a light emitting portion and including an aluminum nitride crystal or an aluminum oxynitride crystal, and a method of manufacturing the nitride semiconductor light emitting device. Also provided is a nitride semiconductor transistor device including a nitride semiconductor layer and a gate insulating film which is in contact with the nitride semiconductor layer and includes an aluminium nitride crystal or an aluminum oxynitride crystal.Type: GrantFiled: June 23, 2008Date of Patent: November 29, 2011Assignee: Sharp Kabushiki KaishaInventors: Takeshi Kamikawa, Yoshinobu Kawaguchi
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Publication number: 20110284822Abstract: An exemplary embodiment of the present invention discloses an LED chip including a substrate, a GaN-based compound semiconductor stacked structure arranged on the substrate, an electrode electrically connected to the semiconductor stacked structure, and a wavelength converting layer covering a portion of the semiconductor stacked structure. The electrode passes through the wavelength converting layer. The semiconductor stacked structure includes a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer.Type: ApplicationFiled: March 25, 2011Publication date: November 24, 2011Applicant: SEOUL SEMICONDUCTOR CO., LTD.Inventors: Jung Hwa JUNG, Bang Hyun KIM
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Publication number: 20110266570Abstract: In a light emitting device package and manufacturing method thereof, a multi-layer structure is allocated upon a substrate, of which at least two films with different refractive indices are alternately stacked together.Type: ApplicationFiled: December 17, 2010Publication date: November 3, 2011Applicant: ADVANCED OPTOELECTRONIC TECHNOLOGY, INC.Inventors: MIN-TSUN HSIEH, WEN-LIANG TSENG, LUNG-HSIN CHEN, CHIH-YUNG LIN, CHING-LIEN YEH, CHI-WEI LIAO, JIAN-SHIHN TSANG
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Patent number: 8049233Abstract: A light-emitting device of the present invention includes: a semiconductor layer 1 including a light-emitting layer 12; a recess/projection portion 14 including recesses and projections formed in a pitch larger than a wavelength of light emitted from the light-emitting layer 12, the recess/projection portion 14 being formed in a whole area or a partial area of the surface of the semiconductor layer which light is emitted from; and a reflective layer formed on an opposite surface of the semiconductor layer to the surface from which light is emitted, the reflective layer having a reflectance of 90% or more. According to the light-emitting device having such arrangement, the light can be emitted efficiently by synergetic effect of the reflective layer and the recess/projection portion.Type: GrantFiled: March 9, 2007Date of Patent: November 1, 2011Assignee: Panasonic Electric Works Co., Ltd.Inventors: Hiroshi Fukshima, Masaharu Yasuda, Kazuyuki Yamae
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Patent number: 8048700Abstract: A semiconductor light-emitting device (LE1) comprises a multilayer structure LS generating light. This multilayer structure includes a plurality of laminated compound semiconductor layers (3 to 8) and has first and second main faces (61, 62) opposing each other. A first electrode (21) and a second electrode (31) are arranged on the first and second main faces, respectively. A film made of silicon oxide (10) is also formed on the first main face so as to cover the first electrode. A glass substrate (1) optically transparent to the light generated by the multilayer structure is secured to the multilayer structure through the film made of silicon oxide.Type: GrantFiled: January 12, 2010Date of Patent: November 1, 2011Assignee: Hamamatsu-shi Photonics K.K.Inventor: Akimasa Tanaka
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Publication number: 20110227109Abstract: Provided is a high-efficiency light emitting diode (LED) that includes: a support substrate; a semiconductor stack positioned on the support substrate, the semiconductor stack including a p-type compound semiconductor layer, an active layer, and an n-type compound semiconductor layer; a first electrode positioned between the support substrate and the semiconductor stack and in ohmic contact with the semiconductor stack; a first bonding pad positioned on a portion of the first electrode that is exposed outside of the semiconductor stack; and a second electrode positioned on the semiconductor stack. Protrusions are formed on exposed surfaces of the semiconductor stack. In addition, the second electrode may be positioned between the first electrode and the support substrate and contacted with the n-type compound semiconductor layer through openings of the semiconductor stack.Type: ApplicationFiled: January 7, 2011Publication date: September 22, 2011Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Chang Youn KIM, Joon Hee LEE, Jong Kyun YOU, Hong Chol LIM
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Patent number: 8022424Abstract: A method of manufacturing a semiconductor device capable of largely increasing the yield and a semiconductor device manufactured by using the method is provided. After a semiconductor layer is formed on a substrate, as one group, a plurality of functional portions with at least one parameter value different from each other is formed in the semiconductor layer for every unit chip area. Then, a subject that is changed depending on the parameter value is measured and evaluated and after that, the substrate is divided for every chip area so that a functional portion corresponding with a given criterion as a result of the evaluation is not broken. Thereby, at least one functional portion corresponding with a given criterion can be formed by every chip area by appropriately adjusting each parameter value.Type: GrantFiled: June 5, 2007Date of Patent: September 20, 2011Assignee: Sony CorporationInventors: Yuji Masui, Takahiro Arakida, Yoshinori Yamauchi, Kayoko Kikuchi, Rintaro Koda, Norihiko Yamaguchi
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Publication number: 20110222569Abstract: A semiconductor laser that includes: a substrate; a first semiconductor multilayer reflector of a first conductive type formed on the substrate; an active region formed on the first semiconductor multilayer reflector; a second semiconductor multilayer reflector of a second conductive type formed on the active region; and an intermediate semiconductor layer of a first conductive type or a second conductive type formed under the first semiconductor multilayer reflector or above the second semiconductor multilayer reflector.Type: ApplicationFiled: September 10, 2010Publication date: September 15, 2011Applicant: FUJI XEROX CO., LTD.Inventors: Kazutaka TAKEDA, Takashi KONDO, Hideaki OZAWA
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Patent number: 8008102Abstract: The present invention relates to a new light emitters that exploit the use of semiconducting single walled carbon nanotubes (SWNTs). Experimental evidences are given on how it is possible, within the standard silicon technology, to devise light emitting diodes (LEDs) emitting in the infrared IR where light emission results from a radiative recombination of electron and holes on semiconducting single walled carbon nanotubes (SWNTs-LED). We will also show how it is possible to implement these SWNTs-LED in order to build up a laser source based on the emission properties of SWNTs. A description of the manufacturing process of such devices is also given.Type: GrantFiled: December 18, 2007Date of Patent: August 30, 2011Assignee: STMicroelectronics S.r.l.Inventors: Vincenzo Vinciguerra, Francesco Buonocore, Maria Fortuna Bevilacqua, Salvatore Coffa
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Patent number: 7985973Abstract: The invention provides a semiconductor light-emitting device package structure. The semiconductor light-emitting device package structure includes a substrate, N sub-mounts, and N semiconductor light-emitting die modules, wherein N is a positive integer lager than or equal to 1. Each of the sub-mounts is embedded on the substrate and exposed partially. Each of the semiconductor light-emitting die modules is mounted on the exposed surface of one of the sub-mounts.Type: GrantFiled: July 12, 2010Date of Patent: July 26, 2011Assignee: Neobulb Technologies, Inc.Inventor: Jen-Shyan Chen
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Publication number: 20110156064Abstract: Disclosed are a light emitting device and a method of fabricating the same. The light emitting device includes a substrate; first and second light emitting cells, each including a first semiconductor layer, an active layer, and a second semiconductor layer; and a connector located between the first and second light emitting cells and the substrate, to electrically connect the first and second light emitting cells to each other. The connector extends from the second semiconductor layer of the first light emitting cell, across the substrate, and through central regions of the second semiconductor layer and active layer of the second light emitting cells, to contact the first semiconductor layer of the second light emitting cell.Type: ApplicationFiled: November 19, 2010Publication date: June 30, 2011Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Won Cheol SEO, Sum Geun LEE
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Patent number: 7968356Abstract: Provided are a light-emitting element, a light-emitting device including the same, and methods of fabricating the light-emitting element and the light-emitting device. The light-emitting element includes a substrate on which a dome pattern is formed and a light-emitting structure conformally formed on the dome pattern. The light-emitting structure includes a first conductive layer of a first conductivity type, a light-emitting layer, and a second conductive layer of a second conductivity type sequentially stacked on the substrate. The light-emitting element also includes a first electrode formed on the first conductive layer and a second electrode formed on the second conductive layer.Type: GrantFiled: August 10, 2009Date of Patent: June 28, 2011Assignee: Samsung Electronics Co., Ltd.Inventor: Yu-Sik Kim
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Patent number: 7968898Abstract: Provided are a nitride semiconductor light emitting device including a coat film formed at a light emitting portion and including an aluminum nitride crystal or an aluminum oxynitride crystal, and a method of manufacturing the nitride semiconductor light emitting device. Also provided is a nitride semiconductor transistor device including a nitride semiconductor layer and a gate insulating film which is in contact with the nitride semiconductor layer and includes an aluminium nitride crystal or an aluminum oxynitride crystal.Type: GrantFiled: March 5, 2007Date of Patent: June 28, 2011Assignee: Sharp Kabushiki KaishaInventors: Takeshi Kamikawa, Yoshinobu Kawaguchi
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Patent number: 7956376Abstract: A light emitting device according to the embodiment includes a reflecting layer; an adhesion layer including an oxide-based material on the reflecting layer; an ohmic contact layer on the adhesion layer; and a light emitting structure layer on the ohmic contact layer.Type: GrantFiled: March 9, 2010Date of Patent: June 7, 2011Assignee: LG Innotek Co., Ltd.Inventor: Hwan Hee Jeong
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Publication number: 20110127549Abstract: Exemplary embodiments of the present invention disclose a light emitting diode chip including a substrate having a first surface and a second surface, a light emitting structure arranged on the first surface of the substrate and including an active layer arranged between a first conductive-type semiconductor layer and a second conductive-type semiconductor layer, a distributed Bragg reflector arranged on the second surface of the substrate, the distributed Bragg reflector to reflect light emitted from the light emitting structure, and a metal layer arranged on the distributed Bragg reflector, wherein the distributed Bragg reflector has a reflectivity of at least 90% for light of a first wavelength in a blue wavelength range, light of a second wavelength in a green wavelength range, and light of a third wavelength in a red wavelength range.Type: ApplicationFiled: February 9, 2011Publication date: June 2, 2011Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Sum Geun LEE, Sang Ki JIN, Jin Cheol SHIN, Jong Kyu KIM, So Ra LEE
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Publication number: 20110121291Abstract: A light-emitting element includes a light-emitting stack for emitting light and a substrate structure including: a first substrate disposed under the light-emitting stack and having a first surface facing the light-emitting stack; and a second substrate disposed under the light-emitting stack and having a second surface facing the light-emitting stack; and a reflective layer formed between the first substrate and the second substrate and having an inclined angle not perpendicular to the first surface.Type: ApplicationFiled: February 7, 2011Publication date: May 26, 2011Inventors: Shih-I Chen, Chia-Liang Hsu, Chiu-Lin Yao, Tzu-Chieh Hsu, Chien-Fu Huang
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Publication number: 20110122908Abstract: Each of a lower reflective layer and an upper reflective layer are formed at a corresponding one of the ends of an optical cavity in the thickness direction. A main active layer is formed in the optical cavity between the lower and upper reflective layers. The optical cavity includes an auxiliary active layer in the vicinity of at least one of the lower reflective layer and a second auxiliary active layer in the vicinity of the upper reflective layer. The auxiliary active layer is located at antinodes of a standing wave where the amplitude of light is large, without increasing the physical length L or optical length Lo between the lower reflective layer and the upper reflective layer.Type: ApplicationFiled: November 19, 2010Publication date: May 26, 2011Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Atsushi TATE
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Patent number: 7947991Abstract: A high efficiency lighting device comprising a light emitting diode structure, an eutectic layer and a distributed-Bragg reflecting layer (DBR) therebetween is disclosed. The distributed-Bragg reflecting layer is attached to said light emitting diode structure by vapor deposition and comprises a plurality of high refraction layers, a plurality of low refraction layers and a micro-contact layer array. The high refraction layers and said low refraction layers are arranged in an alternating manner, so as to form a stacked thin film having an alternate high/low refraction pattern. The micro-contact layers are in said stacked thin film and extend vertically through the stacked thin film, therefore connecting said light emitting diode structure and said eutectic layer.Type: GrantFiled: July 29, 2008Date of Patent: May 24, 2011Assignee: Huga Optotech Inc.Inventors: Wei-Kai Wang, Su-Hui Lin, Wen-Chung Shih
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Publication number: 20110114969Abstract: An exemplary embodiment of the present invention discloses a light emitting diode chip including a substrate, a light emitting structure arranged on the substrate, the light emitting structure including an active layer arranged between a first conductive-type semiconductor layer and a second conductive-type semiconductor layer, and a distributed Bragg reflector to reflect light emitted from the light emitting structure. The distributed Bragg reflector has a reflectivity of at least 90% for light of a first wavelength in a blue wavelength range, light of a second wavelength in a green wavelength range, and light of a third wavelength in a red wavelength range.Type: ApplicationFiled: November 2, 2010Publication date: May 19, 2011Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Chung Hoon LEE, Sum Geun LEE, Sang Ki JIN, Jin Cheol SHIN, Jong Kyu KIM, So Ra LEE
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Publication number: 20110086449Abstract: The present invention discloses a method for fabricating a heat-resistant, humidity-resistant oxide-confined vertical-cavity surface-emitting laser (VCSEL) by slowing down the oxidizing rate during a VCSEL oxidation process to thereby reduce stress concentration of an oxidation layer and by preventing moisture invasion using a passivation layer disposed on a laser window. The VCSEL device thus fabricated is heat-resistant, humidity-resistant, and highly reliable. In a preferred embodiment, the oxidation process takes place at an oxidizing rate of less than 0.4 ?m/min, and the passivation layer is a SiON passivation layer.Type: ApplicationFiled: December 11, 2009Publication date: April 14, 2011Inventors: Jin Shan Pan, Cheng Ju Wu, I Han Wu, Kuo Fong Tseng
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Patent number: 7915604Abstract: An optical device which can operate as a single photon emitter 1, comprising a three dimensional optical cavity 7 which spatially confines a photon to the order of the photon wavelength in all three dimensions. The cavity 7 is configured to define preferred emission direction for photons entering the cavity. A photon can be supplied to the cavity using a quantum dot 5. Strong coupling can occur between the cavity 7 and the quantum dot 5 which causes the formation of two hybridised modes. Switching on an off the coupling by irradiating the device with radiation having an energy equal to that of one of the hybridised modes allows the device to act as an optical switch.Type: GrantFiled: September 12, 2001Date of Patent: March 29, 2011Assignee: Kabushiki Kaisha ToshibaInventor: Andrew James Shields
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Publication number: 20110049549Abstract: Light emitting devices and methods of manufacturing the light emitting devices. The light emitting devices include a silicon substrate; a metal buffer layer on the silicon substrate, a patterned dispersion Bragg reflection (DBR) layer on the metal buffer layer; and a nitride-based thin film layer on the patterned DBR layer and regions between patterns of the DBR layer.Type: ApplicationFiled: February 26, 2010Publication date: March 3, 2011Inventors: Jun-youn Kim, Bok-ki Min, Hyun-gi Hong, Jae-won Lee
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Publication number: 20110049472Abstract: A light emitting diode (LED) has an n-type semiconductor layer, an active layer, a p-type semiconductor layer, and a transparent electrode layer. The LED includes a tunnel layer interposed between the p-type semiconductor layer and the transparent electrode layer, an opening arranged in the transparent electrode layer so that the tunnel layer is exposed, a distributed Bragg reflector (DBR) arranged in the opening, and an electrode pad arranged on the transparent electrode layer to cover the DBR in the opening.Type: ApplicationFiled: November 9, 2010Publication date: March 3, 2011Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Hwa Mok KIM, Dae Won KIM, Dae Sung KAL
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Publication number: 20110049538Abstract: A flip chip LED die is provided and includes a first type doped layer, a second type doped layer, a first electrode layer, a second electrode layer and an insulation layer. The second type doped layer is disposed under the first type doped layer. The first electrode layer is disposed under the first type doped layer without contacting the second type doped layer. The first electrode layer has an exposed area for directly coating an electrically conductive adhesive thereon. The second metal/electrode layer is disposed under the second type doped layer, and also has an exposed area for directly coating the electrically conductive adhesive thereon. The insulation layer is disposed between the first electrode layer and the second electrode layer for electrically insulating and supporting the first electrode layer and the second electrode layer.Type: ApplicationFiled: November 10, 2010Publication date: March 3, 2011Inventor: Chiu-Chung YANG
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Publication number: 20110042698Abstract: The present invention is directed to LED packages and LED displays utilizing the LED packages, wherein the LED chips within the packages are arranged in unique orientations to provide the desired package or display FFP. One LED package according to the present invention comprises a reflective cup and an LED chip mounted in the reflective cup. The reflective cup has a first axis and a second axis orthogonal to the first axis, wherein the LED chip is rotated within the reflective cup so that the LED chip is out of alignment with said first axis. Some of the LED packages can comprise a rectangular LED chip having a chip longitudinal axis and an oval shaped reflective cup having a cup longitudinal axis. The LED chip is mounted within the reflective cup with the chip longitudinal axis angled from the cup longitudinal axis.Type: ApplicationFiled: August 25, 2010Publication date: February 24, 2011Inventors: Alex Chi Keung Chan, David Todd Emerson
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Patent number: 7884383Abstract: A radiation-emitting semiconductor chip (1) comprising a thin-film semiconductor body (2) which has a semiconductor layer sequence with an active region (4) suitable for generating radiation, and a reflector layer (5) arranged on the thin-film semiconductor body. The semiconductor chip has a Bragg reflector in addition to the reflector layer, and the Bragg reflector (6) and the reflector layer are arranged on the same side of the active region.Type: GrantFiled: September 26, 2006Date of Patent: February 8, 2011Assignee: Osram Opto Semiconductors GmbHInventor: Ralph Wirth
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Patent number: 7880162Abstract: A quantum dot (22) is formed on a GaAs substrate (20). In the quantum dot (22), a single electron exists. A cap layer (26) is formed on a surrounding area of the quantum dot (22), and a barrier layer (28) is formed thereon. A quantum dot (30) for detection is formed on the barrier layer (28). Then, a cap layer (34) covering the quantum dot (30) and the like is formed.Type: GrantFiled: September 10, 2007Date of Patent: February 1, 2011Assignee: Fujitsu LimitedInventor: Haizhi Song
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SEMICONDUCTOR LIGHT-EMITTING DEVICE AND METHOD FOR MANUFACTURING SEMICONDUCTOR LIGHT-EMITTING DEVICE
Publication number: 20110012160Abstract: A semiconductor light-emitting device 100 includes a semiconductor layer 2 including an active layer, a supporting substrate 11 for supporting the semiconductor layer 2, and an attachment layer 15 for bonding a main surface of the semiconductor layer 2 onto a main surface of the supporting substrate 11. A two-dimensional diffraction grating is formed in a bonding interface region between the attachment layer and at least one of the main surface of the semiconductor layer 2, the main surface opposing the attachment layer 15, and the main surface of the supporting substrate 11, the main surface opposing the attachment layer 15, the two-dimensional diffraction grating including at least two types of materials having different refractive indices and being arranged periodically.Type: ApplicationFiled: November 11, 2009Publication date: January 20, 2011Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroyuki Kitabayashi, Hideki Matsubara -
Patent number: 7863630Abstract: A light-emitting diode includes a substrate, a compound semiconductor layer including a p-n junction-type light-emitting part formed on the substrate, an electric conductor disposed on the compound semiconductor layer and formed of an electrically conductive material optically transparent to the light emitted from the light-emitting part and a high resistance layer possessing higher resistance than the electric conductor and provided in the middle between the compound semiconductor layer and the electric conductor. In the configuration of a light-emitting diode lamp, the electric conductor and the electrode disposed on the semiconductor layer on the side opposite to the electric conductor across the light-emitting layer are made to assume an equal electric potential by means of wire bonding. The light-emitting diode abounds in luminance and excels in electrostatic breakdown voltage.Type: GrantFiled: July 5, 2006Date of Patent: January 4, 2011Assignee: Showa Denko K.K.Inventors: Ryouichi Takeuchi, Atsushi Matsumura, Takashi Watanabe
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Publication number: 20100327305Abstract: A high efficiency light emitting diode (LED) comprised of a substrate, a buffer layer grown on the substrate (if such a layer is needed), a first active region comprising primary emitting species (PES) that are electrically-injected, a second active region comprising secondary emitting species (SES) that are optically-pumped by the light emitted from the PES, and photonic crystals, wherein the photonic crystals act as diffraction gratings to provide high light extraction efficiency, to provide efficient excitation of the SES, and/or to modulate the far-field emission pattern.Type: ApplicationFiled: July 28, 2010Publication date: December 30, 2010Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Frédéric S. Diana, Aurélien J.F. David, Pierre M. Petroff, Claude C.A. Weisbuch
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Patent number: 7860143Abstract: A VCSEL includes a substrate having a partially removed portion; a metal-assisted DBR having a metal layer and a first mirror stack, wherein the metal layer is located at the partially removed portion of the substrate; an active region having a plurality of quantum wells over the metal-assisted DBR; and a second mirror stack over the active region, wherein a number of alternating layers of the first mirror stack is substantially smaller than a number typically required for a VCSEL without the integrated metal reflector. Such a metal-assisted DBR is especially useful for a long-wavelength VCSEL on a InP substrate or a red-color VCSEL on a GaAs substrate.Type: GrantFiled: December 30, 2004Date of Patent: December 28, 2010Assignee: Finisar CorporationInventors: Jin K. Kim, Tzu-Yu Wang, Gyoungwon Park
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Publication number: 20100316083Abstract: A vertical cavity surface emitting laser (VCSEL) is described using a sub-wavelength grating (SWG) structure that has a very broad reflection spectrum and very high reflectivity. The grating comprises segments of high and low refractive index materials with an index differential between the high and low index materials. By way of example, a SWG reflective structure is disposed over a low index cavity region and above another reflective layer (either SWG or DBR). In one embodiment, the SWG structure is movable, such as according to MEMS techniques, in relation to the opposing reflector to provide wavelength selective tuning. The SWG-VCSEL design is scalable to form the optical cavities for a range of SWG-VCSELs at different wavelengths, and wavelength ranges.Type: ApplicationFiled: June 7, 2010Publication date: December 16, 2010Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Connie J. Chang-Hasnain, Michael Chung-Yi Huang, Ye Zhou, Carlos Fernando Rondina Mateus
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Publication number: 20100295073Abstract: An optoelectronic semiconductor chip (1) comprises a radiation passage area (3), a contact metallization (2a) applied to the radiation passage area (3), and a first reflective layer sequence (2b) applied to that surface of the contact metallization (2a) which is remote from the radiation passage area (3). An optoelectronic component comprising such a chip is also specified.Type: ApplicationFiled: June 23, 2008Publication date: November 25, 2010Applicant: OSRAM OPTO SEMICONDUCTORS GMBHInventors: Stefan Grötsch, Norbert Linder