Source: http://www.google.com/patents/US8119534?dq=6,208,537
Timestamp: 2016-02-12 22:45:41
Document Index: 37507072

Matched Legal Cases: ['Application No. 10189616', 'Application No. 10190784', 'Application No. 10171097', 'Application No. 2006', 'Application No. 2002', 'Application No. 2004', 'Application No. 2005', 'Application No. 10', 'Application No. 04']

Patent US8119534 - Semiconductor light emitting device with protrusions to improve external ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA substrate has at least one recess and/or protrusion formed in and/or on a surface thereof so as to scatter or diffract light generated in an active layer. The recess and/or protrusion is formed in such a shape that can reduce crystalline defects in semiconductor layers....http://www.google.com/patents/US8119534?utm_source=gb-gplus-sharePatent US8119534 - Semiconductor light emitting device with protrusions to improve external efficiency and crystal growthAdvanced Patent SearchPublication numberUS8119534 B2Publication typeGrantApplication numberUS 12/716,506Publication dateFeb 21, 2012Filing dateMar 3, 2010Priority dateAug 19, 2003Fee statusPaidAlso published asEP1667241A1, EP1667241A4, US7683386, US20050179130, US20100197055, WO2005018008A1Publication number12716506, 716506, US 8119534 B2, US 8119534B2, US-B2-8119534, US8119534 B2, US8119534B2InventorsHisanori Tanaka, Yasunobu Hosokawa, Yuuki ShibutaniOriginal AssigneeNichia CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (111), Non-Patent Citations (33), Referenced by (22), Classifications (44), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetSemiconductor light emitting device with protrusions to improve external efficiency and crystal growth
US 8119534 B2Abstract
1. A method of manufacturing a substrate for a light emitting device that has a plurality of protrusions on a surface of the substrate where semiconductor layers of the light emitting device are formed, the method comprising:
In a first embodiment of the present invention, the side face of the protrusion includes at least two sloped surfaces (first sloped surface 22, second sloped surface 23) as shown in FIG. 4A and FIG. 5A. An inclination angle θ2 on a top face side of the protrusion is smaller than an inclination angle θ1 on a bottom side. The inclination angle θ is an angle between the side face and a bottom of the protrusion. In case recesses are formed in the substrate, an inner wall of each recess is also formed so that the inclination angle θ2 of an upper inner wall is larger than an inclination angle θ1 of a lower inner wall. The inclination angle θ1 of the inner wall is a complementary angle of angle φi between the inner wall and a bottom surface of the recess.
In a second embodiment of the invention, a side face of the protrusion is formed as a curved surface. In case an entire side face of the protrusion is formed of a single curved surface, a radius of curvature may be made larger on a top face side and smaller on a bottom side. Alternatively, such a configuration may also be employed as the bottom side being flat, i.e., an upper side of the side face is curved and the lower side is flat. Moreover, a plurality of curved portions and a plurality of flat portions may be formed on the side face of the protrusion. For example, in a structure of the first embodiment where the first and second sloped surfaces are formed, the second sloped surface may be formed as a curved surface with the first sloped surface consisting of a substantially flat surface. A condition of the side face may be selected as required in accordance with substrate material, an etching condition, material of a semiconductor layer and other factors.
In terms of electrostatic withstanding voltage in the backward direction, too, Example A and Example B are comparable similarly to a case of forward direction, while Example C shows greatly improved electrostatic withstanding voltage. It can be seen that circular shapes of Examples B and C show less data dispersion in the characteristics than the triangular shape of Example A. Electrostatic withstanding voltage was measured under conditions of 200 pF and 0 Ω. Breakdown voltage was measured on 10 pieces of each Example. Mean value, maximum value (maximum value is evaluated as “2500 V” if a sample is not destroyed at 2500 V) and minimum value of these measurements are plotted as shown in the graphs of FIG. 20.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4163953Jul 7, 1977Aug 7, 1979Northern Telecom LimitedDouble heterostructure laser for direct coupling to an optical fiberUS4214251Nov 28, 1978Jul 22, 1980Licentia Patent-Verwaltungs-G.M.B.H.Radiation-emitting semiconductor diodeUS4774435Dec 22, 1987Sep 27, 1988Gte Laboratories IncorporatedThin film electroluminescent deviceUS4881237Aug 26, 1988Nov 14, 1989Massachusetts Institute Of TechnologyHybrid two-dimensional surface-emitting laser arraysUS5003357Jan 17, 1990Mar 26, 1991Samsung Semiconductor And Telecommunications Co.Semiconductor light emitting deviceUS5061974Dec 22, 1989Oct 29, 1991Ricoh Company, Ltd.Semiconductor light-emitting device of array typeUS5309001Nov 24, 1992May 3, 1994Sharp Kabushiki KaishaLight-emitting diode having a surface electrode of a tree-like formUS5491350Jun 30, 1994Feb 13, 1996Hitachi Cable Ltd.Light emitting diode and process for fabricating the sameUS5696389Mar 13, 1995Dec 9, 1997Kabushiki Kaisha ToshibaLight-emitting semiconductor deviceUS5734225Nov 14, 1996Mar 31, 1998International Business Machines CorporationEncapsulation of organic light emitting devices using siloxane or siloxane derivativesUS5779924Mar 22, 1996Jul 14, 1998Hewlett-Packard CompanyOrdered interface texturing for a light emitting deviceUS5814839Feb 14, 1996Sep 29, 1998Sharp Kabushiki KaishaSemiconductor light-emitting device having a current adjusting layer and a uneven shape light emitting region, and method for producing sameUS5905275Jun 16, 1997May 18, 1999Kabushiki Kaisha ToshibaGallium nitride compound semiconductor light-emitting deviceUS5955748Oct 1, 1997Sep 21, 1999Oki Electric Industry Co., Ltd.End face light emitting type light emitting diodeUS6072819May 21, 1997Jun 6, 2000Rohm Co., Ltd.Semiconductor light-emitting device and method of fabricating the sameUS6091083Jun 1, 1998Jul 18, 2000Sharp Kabushiki KaishaGallium nitride type compound semiconductor light-emitting device having buffer layer with non-flat surfaceUS6091085Feb 19, 1998Jul 18, 2000Agilent Technologies, Inc.GaN LEDs with improved output coupling efficiencyUS6095666Sep 9, 1998Aug 1, 2000Unisplay S.A.Light sourceUS6107644Jan 23, 1998Aug 22, 2000Rohm Co., Ltd.Semiconductor light emitting deviceUS6163557May 21, 1998Dec 19, 2000Xerox CorporationFabrication of group III-V nitrides on mesasUS6232623Jun 17, 1999May 15, 2001Sony CorporationSemiconductor device on a sapphire substrateUS6238947Dec 17, 1999May 29, 2001Rohm Co., Ltd.Semiconductor light-emitting device and method of fabricating the sameUS6258618Jan 14, 2000Jul 10, 2001Lumileds Lighting, Us, LlcLight emitting device having a finely-patterned reflective contactUS6291839Sep 11, 1998Sep 18, 2001Lulileds Lighting, U.S. LlcLight emitting device having a finely-patterned reflective contactUS6307218Nov 20, 1998Oct 23, 2001Lumileds Lighting, U.S., LlcElectrode structures for light emitting devicesUS6316785Oct 14, 1999Nov 13, 2001Kabushiki Kaisha ToshibaNitride-compound semiconductor deviceUS6325850Oct 15, 1998Dec 4, 2001CENTRE NATIONAL DE LA RECHERCH� SCIENTIFIQUE (CNRS)Method for producing a gallium nitride epitaxial layerUS6335546Jul 30, 1999Jan 1, 2002Sharp Kabushiki KaishaNitride semiconductor structure, method for producing a nitride semiconductor structure, and light emitting deviceUS6346771Nov 19, 1998Feb 12, 2002Unisplay S.A.High power led lampUS6348096Mar 11, 1998Feb 19, 2002Nec CorporationMethod for manufacturing group III-V compound semiconductorsUS6410942Nov 14, 2000Jun 25, 2002Cree Lighting CompanyEnhanced light extraction through the use of micro-LED arraysUS6413627Jun 15, 1999Jul 2, 2002Sumitomo Electric Industries, Ltd.GaN single crystal substrate and method of producing sameUS6426519Nov 15, 2000Jul 30, 2002Ngk Insulators, Ltd.Epitaxial growth substrate and a method for producing the sameUS6469320May 25, 2001Oct 22, 2002Rohm, Co., Ltd.Semiconductor light emitting deviceUS6479889Aug 30, 1999Nov 12, 2002Sony CorporationSemiconductor device package, and fabrication method thereofUS6504590Oct 7, 1999Jan 7, 2003Citizen Watch Co., LtdLiquid crystal display and timepieceUS6514782Dec 22, 1999Feb 4, 2003Lumileds Lighting, U.S., LlcMethod of making a III-nitride light-emitting device with increased light generating capabilityUS6555845Dec 14, 2001Apr 29, 2003Nec CorporationMethod for manufacturing group III-V compound semiconductorsUS6566231Feb 23, 2001May 20, 2003Matsushita Electric Industrial Co., Ltd.Method of manufacturing high performance semiconductor device with reduced lattice defects in the active regionUS6617182Sep 14, 1999Sep 9, 2003Matsushita Electric Industrial Co., Ltd.Semiconductor device and semiconductor substrate, and method for fabricating the sameUS6620238Oct 2, 2001Sep 16, 2003Sharp Kabushiki KaishaNitride semiconductor structure, method for producing a nitride semiconductor structure, and light emitting deviceUS6791119Jan 25, 2002Sep 14, 2004Cree, Inc.Light emitting diodes including modifications for light extractionUS6802902Sep 21, 2001Oct 12, 2004LumilogProcess for producing an epitaxial layer of gallium nitrideUS6815726Mar 17, 2003Nov 9, 2004Matsushita Electric Industrial Co., Ltd.Semiconductor device and semiconductor substrate, and method of fabricating the sameUS6821804Sep 17, 2003Nov 23, 2004Cree, Inc.Enhanced light extraction in LEDs through the use of internal and external optical elementsUS6870191Jul 24, 2002Mar 22, 2005Nichia CorporationSemiconductor light emitting deviceUS6994751Feb 25, 2002Feb 7, 2006Sanyo Electric Co., Ltd.Nitride-based semiconductor element and method of forming nitride-based semiconductorUS7033854Feb 28, 2001Apr 25, 2006Sony CorporationMethod of crystallizing a nitride III-V compound semiconductor layer on a sapphire substrateUS7053420Mar 20, 2002May 30, 2006Mitsubishi Cable Industries, Ltd.GaN group semiconductor light-emitting element with concave and convex structures on the substrate and a production method thereofUS7118929Oct 28, 2003Oct 10, 2006LumilogProcess for producing an epitaxial layer of gallium nitrideUS7125736Apr 25, 2005Oct 24, 2006Sony CorporationMethod of crystallizing a nitride III-V compound semiconductor layer on a sapphire substrateUS7135709Sep 21, 2000Nov 14, 2006Osram GmbhSurface structured light-emitting diode with improved current couplingUS7179667Sep 17, 2001Feb 20, 2007Mitsubishi Cable Industries, Ltd.Semiconductor base material and method of manufacturing the materialUS20010003019Nov 30, 2000Jun 7, 2001Sony CorporationMethod of manufacturing crystal of III-V compound of the nitride system, crystal substrate of III-V compound of the nitride system, crystal film of III-V compound of the nitride system, and method of manufacturing deviceUS20010022495Mar 30, 2001Sep 20, 2001Salam Hassan P. A.LED lampsUS20020000548 *Aug 27, 2001Jan 3, 2002Blalock Guy T.Field emission tips and methods for fabricating the sameUS20020063521Jan 22, 2002May 30, 2002Salam Hassan Paddy AbdelHigh power led lampUS20020117104Feb 25, 2002Aug 29, 2002Sanyo Electric Co., Ltd.Nitride-based semiconductor element and method of forming nitride-based semiconductorUS20030057444Jul 24, 2002Mar 27, 2003Nichia CorporationSemiconductor light emitting deviceUS20030143771Jan 16, 2003Jul 31, 2003Matsushita Electric Industrial Co., Ltd.Method of fabricating nitride semiconductor, method of fabricating nitride semiconductor device, nitride semiconductor device, semiconductor light emitting device and method of fabricating the sameUS20030209705Jun 10, 2003Nov 13, 2003Emerson David ToddUltraviolet light emitting diodeUS20040119082 *Dec 9, 2003Jun 24, 2004Kabushiki Kaisha ToshibaNitride based semiconductor light-emitting device and method of manufacturing the sameUS20050001227Jul 23, 2004Jan 6, 2005Nichia CorporationSemiconductor light-emitting deviceUS20050035359Sep 30, 2004Feb 17, 2005Matsushita Electric Industrial Co., Ltd.Semiconductor device and semiconductor substrate, and method of fabricating the sameUS20050179130Aug 18, 2004Aug 18, 2005Hisanori TanakaSemiconductor deviceUS20050263778Aug 3, 2005Dec 1, 2005Sanyo Electric Co., Ltd.Nitride-based semiconductor element and method of forming nitride-based semiconductorUS20070072320Sep 11, 2006Mar 29, 2007Eric FrayssinetProcess for producing an epitalixal layer of galium nitrideUS20080303043Jan 30, 2008Dec 11, 2008Nichia CorporationSemiconductor light emitting deviceUS20090042328Jan 30, 2008Feb 12, 2009Nichia CorporationSemiconductor light emitting deviceEP0544512A1Nov 25, 1992Jun 2, 1993Sharp Kabushiki KaishaLight-emitting diode having a surface electrode of a tree-like formEP0966047A2Jun 17, 1999Dec 22, 1999Sumitomo Electric Industries, LimitedGaN single crystal substrate and method of producing sameEP1088914A1Sep 27, 2000Apr 4, 2001Sumitomo Electric Industries, LimitedMethod of growing single crystal GaN, method of making single crystal GaN substrate and single crystal GaN substrateEP1101841A2Nov 15, 2000May 23, 2001Ngk Insulators, Ltd.Substrate for epitaxy of III-V compounds and a method for producing the sameGB2296378A Title not availableGB2304230A Title not availableGB2329238A Title not availableGB2331625A Title not availableGB2341488A Title not availableGB2381380A Title not availableGB2381381A Title not availableJP1378949A1 Title not availableJP11150306A Title not availableJP11224960A Title not availableJP11274568A Title not availableJP56087383A Title not availableJP58096781A Title not availableJP62076686A Title not availableJP2000332300A Title not availableJP2003197961A Title not availableJPH0559861A Title not availableJPH0585894A Title not availableJPH1048403A Title not availableJPH04313281A Title not availableJPH05145119A Title not availableJPH05183193A Title not availableJPH05335622A Title not availableJPH06237012A Title not availableJPH06291368A Title not availableJPH08222763A Title not availableJPH08236870A Title not availableJPH09312442A Title not availableJPH10209495A Title not availableJPH11150306A Title not availableJPH11195813A Title not availableJPH11224960A Title not availableJPH11238687A Title not availableJPH11274560A Title not availableJPS5687383A Title not availableJPS5896781A Title not availableJPS6276686A Title not availableWO02/103813A1 Title not available* Cited by examinerNon-Patent CitationsReference1European Search Report issued Feb. 18, 2011 in corresponding European Application No. 10189616.5.2European Search Report issued Feb. 8, 2011 in corresponding European Application No. 10190784.8.3European Search Report issued Oct. 28, 2010 in corresponding European Application No. 10171097.8.4Guan, et al., "Chemical Processing and Materials Compatibility of High-K Dielectric Materials for Advanced Gate Stacks", Solid State Phenomena, Jan. 2001, vols. 76-77, pp. 19-22.5Hiroaki Okamoto et al., "A Development of High Power Ultraviolet LED Using LEPS Method", Mitsubisi Densen Kogyo Jiho, Oct. 2001, vol. 98, p. 92-96.6International Search Report issued Jan. 2004 in the corresponding Application PCT/JP2004/011845.7Japanese Notification issued Apr. 28, 2009 in connection with JP Application No. 2006-252509 (with partial English translation).8Japanese Notification of Reasons for Refusal issued Dec. 5, 2006 in connection with JP Application No. 2002-213490 corresponding to the present U.S. application.9Notice of Allowance issued Nov. 11, 2009 in the corresponding U.S. Appl. No. 10/920,419.10Notice of Rejection of the corresponding Japanese Patent Application No. 2004-240027 and English Translation.11Notification of Reasons for Refusal of corresponding Japanese Patent Application No. 2005-101566, with partial English language translation.12Office Action dated Apr. 26, 2007 issued in corresponding U.S. Appl. No. 10/920,419.13Office Action dated Aug. 2, 2006 issued in corresponding U.S. Appl. No. 10/920,419.14Office Action dated Jan. 12, 2006 issued in U.S. U.S. Appl. No. 10/897,163.15Office Action dated Jan. 8, 2008 issued in corresponding U.S. Appl. No. 10/920,419.16Office Action dated May 4, 2009 issued in corresponding U.S. Appl. No. 10/920,419.17Office Action dated Oct. 17, 2008 issued in corresponding U.S. Appl. No. 10/920,419.18Office Action issued May 28, 2010 in corresponding Korean Patent Application No. 10-2007-7017029, with partial English translation.19Ponce, F.A. et al., Spatial distribution of the luminescence in GaN thin films, Appl. Phys. Lett. vol. 68, No. 1 (Jan. 1, 1996), pp. 57-59.20Supplemental European Search Report issued in European Application No. 04 77 1806, which is a foreign counterpart of the present application.21Tadatomo, Kazuyuki, et al., "High Output Power InGaN Ultraviolet Light-Emitting Diodes Fabricated on Patterned Substrates Using Metalorganic Vapor Phase Epitaxy" The Japan Society of Applied Physics, vol. 40 (2001, pp. 583 to 585, Jun. 16, 2001).22U.S. Appl. No. 10/897,163, filed Jul. 23, 2004 (Published as U.S. 2005-0001227 on Jan. 6, 2005, as listed above).23U.S. Office Action issued Apr. 4, 2008 in connection with U.S. Appl. No. 10/897,163 corresponding to the present U.S. application.24U.S. Office Action issued Apr. 6, 2007 in connection with U.S. Appl. No. 10/897,163 corresponding to the present U.S. application.25U.S. Office Action issued Jan. 12, 2006 in connection with U.S. Appl. No. 10/897,163 corresponding to the present U.S. application.26U.S. Office Action issued Jul. 10, 2003 in connection with U.S. Appl. No. 10/201,600.27U.S. Office Action issued May 12, 2009 in connection with U.S. Appl. No. 12/022,794.28U.S. Office Action issued Oct. 11, 2006 in connection with U.S. Appl. No. 10/897,163 corresponding to the present U.S. application.29U.S. Office Action issued Oct. 22, 2007 in connection with U.S. Appl. No. 10/897,163 corresponding to the present U.S. application.30U.S. Office Action issued Oct. 23, 2008 in connection with U.S. Appl. No. 10/897,163 corresponding to the present U.S. application.31U.S. Office Action issued Sep. 2, 2009 in connection with U.S. Appl. No. 10/897,163.32Yamada, M., et al., "InGaN-Based Near-Ultraviolet and Blue-Light-Emitting Diodes with High External Quantum Efficiency Using a Patterned Sapphire Substrate and a Mesh Electrode" Jpn. J. Appl. Phys. vol. 41 (2002) Pt. 2, No. 12B, pp. L1431 to L1433.33Yu et al., "Optical properties of wurtzite structure GaN on sapphire around fundamental absorption edge (0.78-4.77 eV) by spectroscopic ellipsometry and the optical transmission method,"Appl. Phys. Lett., vol. 70, No. 24, Jun. 16, 1997, pp. 3209-3211.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8415702 *Sep 15, 2011Apr 9, 2013Xiamen Sanan Optoelectronics Technology Co., Ltd.Reflector, manufacture method thereof and light-emitting device including the reflectorUS8507357 *Jan 18, 2012Aug 13, 2013Xiamen Sanan Optoelectronics Technology Co., Ltd.Method for lift-off of light-emitting diode substrateUS8809880Mar 11, 2013Aug 19, 2014Cree, Inc.Light emitting diode (LED) chips and devices for providing failure mitigation in LED arraysUS8921869Jun 3, 2013Dec 30, 2014Cree, Inc.Method of providing light emitting deviceUS8994057Oct 11, 2013Mar 31, 2015Cree, Inc.Light emitting devices for light emitting diodes (LEDS)US9000470Jan 30, 2014Apr 7, 2015Cree, Inc.Light emitter devicesUS9024331Dec 13, 2010May 5, 2015Toyoda Gosei Co., Ltd.Substrate, template substrate, semiconductor light emitting element, semiconductor light emitting element producing method, illumination device using semiconductor light emitting element and electronic deviceUS9194567Feb 25, 2014Nov 24, 2015Cree, Inc.High voltage array light emitting diode (LED) devices and fixturesUS9203004Oct 1, 2013Dec 1, 2015Cree, Inc.Light emitting devices for light emitting diodes (LEDs)US9209354Jan 6, 2014Dec 8, 2015Cree, Inc.Light emitting devices for light emitting diodes (LEDs)US20120104410 *Sep 15, 2011May 3, 2012Pan QunfengReflector, Manufacture Method Thereof And Light-Emitting Device Including The ReflectorUS20120190148 *Jul 26, 2012Xiamen Sanan Optoelectronics Technology Co., Ltd.Method for lift-off of light-emitting diode substrateUS20140103376 *Dec 18, 2013Apr 17, 2014Epistar CorporationLight-emitting device having a patterned surfaceUSD702653Oct 26, 2011Apr 15, 2014Cree, Inc.Light emitting device componentUSD705181Jan 31, 2012May 20, 2014Cree, Inc.Light emitting device componentUSD706231Mar 30, 2012Jun 3, 2014Cree, Inc.Light emitting deviceUSD707192Jan 31, 2012Jun 17, 2014Cree, Inc.Light emitting deviceUSD712850 *Mar 28, 2013Sep 9, 2014Cree, Inc.Light emitter deviceUSD721339Jun 27, 2012Jan 20, 2015Cree, Inc.Light emitter deviceUSD736725Apr 14, 2014Aug 18, 2015Cree, Inc.Light emitting device componentUSD739565Jun 27, 2013Sep 22, 2015Cree, Inc.Light emitter unitUSD740453Jun 27, 2013Oct 6, 2015Cree, Inc.Light emitter unit* Cited by examinerClassifications U.S. Classification438/734, 438/713, 257/E21.119, 257/95, 438/29International ClassificationH01L23/04, H01L21/48, H01L21/302, H01L33/00, H01L33/32, H01L33/62, H01L33/40, H01L33/24, H01L33/06, H01L33/38, H01L33/22, H01L21/3065Cooperative ClassificationH01L2224/48095, H01L2924/181, H01L2224/48247, H01L2224/48465, H01L2224/49107, H01L21/02647, H01L33/38, H01L33/20, H01L21/0243, H01L21/02433, H01L25/167, H01L21/0242, H01L21/02658, H01L21/0254, H01L21/0237, H01L33/007, H01L33/22, H01L2933/0083, H01L2924/3025European ClassificationH01L21/02K4C1B1, H01L33/00G3B2, H01L21/02K4A5S, H01L33/20, H01L21/02K4T2, H01L21/02K4A1, H01L21/02K4A7, H01L21/02K4A1JLegal EventsDateCodeEventDescriptionAug 5, 2015FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services