Source: http://www.google.com/patents/US6191443?dq=%22Meaning-based+advertising+and+document+relevance+determination%22
Timestamp: 2013-12-05 06:08:28
Document Index: 538536601

Matched Legal Cases: ['application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09']

Patent US6191443 - Capacitors, methods of forming capacitors, and DRAM memory cells - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Advanced Patent Search | Sign inAdvanced Patent SearchPatentsCapacitors and methods of forming capacitors are disclosed. In one implementation, a capacitor comprises a capacitor dielectric layer comprising Ta2O5 formed over a first capacitor electrode. A second capacitor electrode is formed over the Ta2O5 capacitor dielectric layer. Preferably, at least a portion...http://www.google.com/patents/US6191443?utm_source=gb-gplus-sharePatent US6191443 - Capacitors, methods of forming capacitors, and DRAM memory cellsPublication numberUS6191443 B1Publication typeGrantApplication numberUS 09/033,063Publication dateFeb 20, 2001Filing dateFeb 28, 1998Priority dateFeb 28, 1998Fee statusPaidAlso published asUS6400552, US6773981, US20010053057Publication number033063, 09033063, US 6191443 B1, US 6191443B1, US-B1-6191443, US6191443 B1, US6191443B1InventorsHusam N. Al-Shareef, Scott Jeffrey DeBoer, F. Daniel Gealy, Randhir P. S. ThakurOriginal AssigneeMicron Technology, Inc.Patent Citations (68), Non-Patent Citations (32), Referenced by (15), Classifications (15), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetCapacitors, methods of forming capacitors, and DRAM memory cellsUS 6191443 B1Abstract Capacitors and methods of forming capacitors are disclosed. In one implementation, a capacitor comprises a capacitor dielectric layer comprising Ta2O5 formed over a first capacitor electrode. A second capacitor electrode is formed over the Ta2O5 capacitor dielectric layer. Preferably, at least a portion of the second capacitor electrode is formed over and in contact with the Ta2O5 in an oxygen containing environment at a temperature of at least about 175� C. Chemical vapor deposition is one example forming method. The preferred second capacitor electrode comprises a conductive metal oxide. A more preferred second capacitor electrode comprises a conductive silicon comprising layer, over a conductive titanium comprising layer, over a conductive metal oxide layer. A preferred first capacitor electrode comprises a conductively doped Si-Ge alloy. Preferably, a Si3N4 layer is formed over the first capacitor electrode. DRAM cells and methods of forming DRAM cells are disclosed.
SUMMARY OF THE INVENTION The invention comprises capacitors, methods of forming capacitors and DRAM circuitry. In one implementation, a capacitor comprises a capacitor dielectric layer comprising Ta2O5 formed over a first capacitor electrode. A second capacitor electrode is formed over the Ta2O5 capacitor dielectric layer. Preferably, at least a portion of the second capacitor electrode is formed over and in contact with the Ta2O5 in an oxygen containing environment at a temperature of at least about 175� C. Chemical vapor deposition is one example forming method. The preferred second capacitor electrode comprises a conductive metal oxide. A more preferred second capacitor electrode comprises a conductive silicon comprising layer, over a conductive titanium comprising layer, over a conductive metal oxide layer. A preferred first capacitor electrode comprises a conductively doped Si-Ge alloy. Preferably, a Si3N4 layer is formed over the first capacitor electrode.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4333808Feb 13, 1981Jun 8, 1982International Business Machines CorporationMethod for manufacture of ultra-thin film capacitorUS4464701Aug 29, 1983Aug 7, 1984International Business Machines CorporationProcess for making high dielectric constant nitride based materials and devices using the sameUS4891682Dec 1, 1983Jan 2, 1990Olympus Optical Co., Ltd.Solid state image pick-up device having a number of static induction transistor image sensorsUS4952904Dec 23, 1988Aug 28, 1990Honeywell Inc.Adhesion layer for platinum based sensorsUS5053917Aug 30, 1990Oct 1, 1991Nec CorporationThin film capacitor and manufacturing method thereofUS5079191May 1, 1990Jan 7, 1992Hitachi, Ltd.Process for producing a semiconductor deviceUS5111355Sep 13, 1990May 5, 1992National Semiconductor Corp.High value tantalum oxide capacitorUS5142438Nov 15, 1991Aug 25, 1992Micron Technology, Inc.Dram cell having a stacked capacitor with a tantalum lower plate, a tantalum oxide dielectric layer, and a silicide buried contactUS5191510Apr 29, 1992Mar 2, 1993Ramtron International CorporationUse of palladium as an adhesion layer and as an electrode in ferroelectric memory devicesUS5234556Aug 20, 1990Aug 10, 1993Hitachi, Ltd.Polymeric metal oxide materials and their formation and useUS5279985Sep 15, 1992Jan 18, 1994Nec CorporationSemiconductor device and method of fabrication thereofUS5293510Dec 20, 1991Mar 8, 1994Ramtron International CorporationSemiconductor device with ferroelectric and method of manufacturing the sameUS5316982May 28, 1992May 31, 1994Sharp Kabushiki KaishaSemiconductor device and method for preparing the sameUS5330935Jul 21, 1992Jul 19, 1994International Business Machines CorporationLow temperature plasma oxidation processUS5335138Feb 12, 1993Aug 2, 1994Micron Semiconductor, Inc.High dielectric constant capacitor and method of manufactureUS5348894Jan 27, 1993Sep 20, 1994Texas Instruments IncorporatedMethod of forming electrical connections to high dielectric constant materialsUS5352623Feb 15, 1994Oct 4, 1994Nec CorporationMethod for manufacturing a semiconductor deviceUS5362632Feb 8, 1994Nov 8, 1994Micron Semiconductor, Inc.Barrier process for Ta.sub.2 O.sub.5 capacitorUS5372859Oct 20, 1992Dec 13, 1994The United States Of America As Represented By The Administrator Of The National Aeronautics And Space AdministrationEnhanced fatigue and retention in ferroelectric thin film memory capacitors by post-top electrode anneal treatmentUS5397446Jul 1, 1993Mar 14, 1995Sharp Kabushiki KaishaMethod of forming a ferroelectric filmUS5442213Jun 7, 1994Aug 15, 1995Mitsubishi Denki Kabushiki KaishaSemiconductor device with high dielectric capacitor having sidewall spacersUS5466629Feb 3, 1995Nov 14, 1995Olympus Optical Co., Ltd.Process for fabricating ferroelectric integrated circuitUS5468687Jul 27, 1994Nov 21, 1995International Business Machines CorporationMethod of making TA.sub.2 O.sub.5 thin film by low temperature ozone plasma annealing (oxidation)US5471364Mar 31, 1993Nov 28, 1995Texas Instruments IncorporatedElectrode interface for high-dielectric-constant materialsUS5504041 *Aug 1, 1994Apr 2, 1996Texas Instruments IncorporatedConductive exotic-nitride barrier layer for high-dielectric-constant materialsUS5508953May 16, 1994Apr 16, 1996Texas Instruments IncorporatedCapacitor, electrode structure, and semiconductor memory deviceUS5510651Nov 18, 1994Apr 23, 1996Motorola, Inc.Semiconductor device having a reducing/oxidizing conductive materialUS5552337Sep 9, 1994Sep 3, 1996Samsung Electronics Co., Ltd.Method for manfacturing a capacitor for a semiconductor memory device having a tautalum oxide filmUS5555486Dec 29, 1994Sep 10, 1996North Carolina State UniversityHybrid metal/metal oxide electrodes for ferroelectric capacitorsUS5561307Jul 18, 1994Oct 1, 1996Olympus Optical Co., Ltd.Ferroelectric integrated circuitUS5585300Aug 1, 1994Dec 17, 1996Texas Instruments IncorporatedMethod of making conductive amorphous-nitride barrier layer for high-dielectric-constant material electrodesUS5617290Jun 7, 1995Apr 1, 1997Texas Instruments IncorporatedBarium strontium titanate (BST) thin films using boronUS5641703Apr 28, 1995Jun 24, 1997Massachusetts Institute Of TechnologyVoltage programmable links for integrated circuitsUS5654222May 17, 1995Aug 5, 1997Micron Technology, Inc.Method for forming a capacitor with electrically interconnected constructionUS5663088May 19, 1995Sep 2, 1997Micron Technology, Inc.Method of forming a Ta.sub.2 O.sub.5 dielectric layer with amorphous diffusion barrier layer and method of forming a capacitor having a Ta.sub.2 O.sub.5 dielectric layer and amorphous diffusion barrier layerUS5688724Dec 23, 1994Nov 18, 1997National Semiconductor CorporationMethod of providing a dielectric structure for semiconductor devicesUS5728603Dec 9, 1996Mar 17, 1998Northern Telecom LimitedMethod of forming a crystalline ferroelectric dielectric material for an integrated circuitUS5780359Dec 11, 1995Jul 14, 1998Applied Materials, Inc.Polymer removal from top surfaces and sidewalls of a semiconductor waferUS5786248Oct 12, 1995Jul 28, 1998Micron Technology, Inc.Semiconductor processing method of forming a tantalum oxide containing capacitorUS5790366Dec 6, 1996Aug 4, 1998Sharp Kabushiki KaishaHigh temperature electrode-barriers for ferroelectric and other capacitor structuresUS5798903Dec 26, 1995Aug 25, 1998Bell Communications Research, Inc.Electrode structure for ferroelectric capacitor integrated on siliconUS5807774Dec 6, 1996Sep 15, 1998Sharp Kabushiki KaishaSimple method of fabricating ferroelectric capacitorsUS5814852Jun 11, 1996Sep 29, 1998Micron Technology, Inc.Method of forming a Ta.sub.2 O.sub.5 dielectric layer, method of forming a capacitor having a Ta.sub.2 O.sub.5 dielectric layer, and capacitor constructionUS5834345Sep 24, 1996Nov 10, 1998Nec CorporationMethod of fabricating field effect thin film transistorUS5837591Feb 19, 1997Nov 17, 1998Matsushita Electric Industrial Co., Ltd.Method of manufacturing a semiconductor deviceUS5837593Sep 3, 1996Nov 17, 1998Samsung Electronics Co., Ltd.Methods of fabricating microelectronic capacitors having tantalum pentoxide dielectricsUS5838035Jun 10, 1997Nov 17, 1998Bell Communications Research, Inc.Barrier layer for ferroelectric capacitor integrated on siliconUS5843830Jun 26, 1996Dec 1, 1998Micron Technology, Inc.Capacitor, and methods for forming a capacitorUS5844771Aug 15, 1997Dec 1, 1998Micron Technology, Inc.Capacitor constructionUS5888295Aug 20, 1996Mar 30, 1999Micron Technology, Inc.Method of forming a silicon filmUS5899740Sep 4, 1997May 4, 1999Samsung Electronics Co., Ltd.Methods of fabricating copper interconnects for integrated circuitsUS5910218Sep 12, 1996Jun 8, 1999Samsung Electronics Co., Ltd.Systems for forming films having high dielectric constantsUS5910880Aug 20, 1997Jun 8, 1999Micron Technology, Inc.Semiconductor circuit components and capacitorsUS5916634Oct 1, 1996Jun 29, 1999Sandia CorporationChemical vapor deposition of W-Si-N and W-B-NUS5930584Apr 30, 1996Jul 27, 1999United Microelectronics Corp.Process for fabricating low leakage current electrode for LPCVD titanium oxide filmsUS5933316Aug 2, 1993Aug 3, 1999Motorola Inc.Method for forming a titanate thin film on silicon, and device formed therebyUS5970369Nov 21, 1997Oct 19, 1999Fujitsu LimitedSemiconductor device with polysilicon layer of good crystallinity and its manufacture methodUS5990507Jul 9, 1997Nov 23, 1999Kabushiki Kaisha ToshibaSemiconductor device having ferroelectric capacitor structuresUS6010744Dec 23, 1997Jan 4, 2000Advanced Technology Materials, Inc.Method for nucleation controlled chemical vapor deposition of metal oxide ferroelectric thin filmsUS6015989Dec 20, 1996Jan 18, 2000Mitsubishi Denki Kabushiki KaishaSemiconductor device having a capacitor electrode formed of iridum or ruthenium and a quantity of oxygenUS6027969Jun 4, 1998Feb 22, 2000Taiwan Semiconductor Manufacturing CompanyCapacitor structure for a dynamic random access memory cellUS6028360Jun 29, 1998Feb 22, 2000Hitachi, Ltd.Semiconductor integrated circuit device in which a conductive film is formed over a trap film which in turn is formed over a titanium filmUS6046469Sep 28, 1998Apr 4, 2000Sharp Kabushiki KaishaSemiconductor storage device having a capacitor and a MOS transistorUS6051859Jan 16, 1998Apr 18, 2000Kabushiki Kaisha ToshibaDRAM having a cup-shaped storage node electrode recessed within an insulating layerJP40534364B Title not availableJPH0621333A Title not availableJPH01222469A Title not availableJPH05221644A Title not available* Cited by examinerNon-Patent CitationsReference1Anonymous Research Disclosure, 1989R D-0299041 titled "Double High Dielectric Capacitor", Derwent-Week 198917 (Derwent World Patent Index).2 *Fazan et al, IEDM 92, pp. 263-266, Apr. 1992.3H. Shinriki and M. Nakata, IEEE Transaction On Electron Devices vol 38 No 3 Mar. 1991.4H. Shinriki and M. Nakata, IEEE Transaction On Electron Devices, vol. 38 No. 3, Mar. 1991.5Hiromu Yamaguchi; "Structural and Electrical Characterization of SrTiO3 Thin Films Prepared by Metal Organic Chemical Vapor Deposition"; Jpn. J. Appl. Phys. vol. 32 (1993) Pt.1, No. 98, pp. 4069-4073-Jan.6 *Lesaicherre et al, IDEM 94, pp. 831-834, Jan. 1994.7M. A. Farooq et al.; "Tantalum nitride as a diffusion barrier between PdsSi, CoSi2 and aluminum"; 1989 American Institute of Physics; pp. 3017-3022-Jan.8M.A. Farooq, S.P. Muraraka, C.C. Chang, F.A. Baiocchi, Tantalum nitride as a dissusion barrier between Pd2Si, CoSi2 and aluminum, 1989 American Institute of Physics, pp. 3017-3022.9McIntyre, Paul C. et al., "Kinetics And Mechanisms Of TiN Oxidation Beneath Pt/TiN Films", J. Appl. Phys., vol. 82, No. 9, pp. 4577-4585 (Nov. 1997).10S. Wolf and R.N. Tauber, Silicon Processing for the VLSI Era, vol. 2, Lattice Press, pp. 589-591.11Satashi Kamiyama et al.; "Ultrathin Tantalum Oxide Capacitor Dielectric Layers Fabricated Using Rapid Thermal Nitridation prior to Low Pressure Chemical Vapor deposition"; The Electrochemical Society, Inc., vol. 140, No. 6, 1993; pp. 1617-1625-Jan.12Satoshi Kamiyama et al.; "Highly Reliable 2.5nm Ta2O5 Capacitor Process Technology for 256Mbit DRAMs"; IEEE, 1991; pp. 32.2.1-32.2.4-Jan.13Shigeo Onishi et al.; "A Half-Micron Ferroelectric Memory Cell Technology with Stacked Capacitor Structure"; IEEE, 1994; pp. 34.4.1-34.4.4-Jan.14T. Eimori et al.; "A Newly Designed Planar Stacked Capacitor Cell with High Dielectric Film for 256Mbit DRAM"; IEEE, 1993;-Jan. pp. 26.3.1-26.3.4.15U.S. application No. 08/542, 430, Schuegraf, filed Jan. 13, 1999.16U.S. application No. 08/670,644, Graettinger.17U.S. application No. 08/738,789, Sandhu et al., filed Oct. 29, 1996.18U.S. application No. 08/858,027, Sandhu et al., filed May 16, 1997.19U.S. application No. 08/881,561, Sandhu et al., filed Jun. 24, 1997.20U.S. application No. 08/994,054, Parekh et al., Dec. 19, 1997.21U.S. application No. 09/033,064, Al-Shareef et al., filed Feb. 28, 1998.22U.S. application No. 09/058,612, Agarwal et al., filed Apr. 10, 1998.23U.S. application No. 09/059,057, Agarwal et al., filed Apr. 10, 1998.24U.S. application No. 09/074,638, Agarwal et al., filed May 7, 1998.25U.S. application No. 09/083,257, Al-Shareef et al., filed May 21, 1998.26U.S. application No. 09/086,389, Sandhu et al., filed May 28, 1998.27U.S. application No. 09/098,035, DeBoer et al., filed Jun. 15, 1998.28U.S. application No. 09/122,473, Schuegraf, filed Jul. 23, 1998.29U.S. application No. 09/137,780, Al-Shareef et al., filed Aug. 20, 1998.30U.S. application No. 09/185,412, Graettinger et al., filed Nov. 3, 1998.31U.S. application No. 09/229,518, DeBoer et al.32Wolf, Stanley; "One-Transistor DRAM Cell Design"; Silicon Processing for the VLSI Era, 1990; pp. 589-591-Jan.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6380574 *May 25, 1998Apr 30, 2002Hitachi, Ltd.Ferroelectric capacitor with a self-aligned diffusion barrierUS6400552Apr 30, 2001Jun 4, 2002Micron Technology, Inc.Capacitor with conductively doped Si-Ge alloy electrodeUS6462368Jan 31, 2002Oct 8, 2002Hitachi, Ltd.Ferroelectric capacitor with a self-aligned diffusion barrierUS6610579 *Apr 26, 2001Aug 26, 2003Fujitsu LimitedSemiconductor device having a high-dielectric capacitorUS6689657May 30, 2002Feb 10, 2004Micron Technology, Inc.Method of forming a capacitorUS6696718Apr 6, 1999Feb 24, 2004Micron Technology, Inc.Capacitor having an electrode formed from a transition metal or a conductive metal-oxide, and method of forming sameUS6699747Nov 18, 2002Mar 2, 2004Infineon Technologies AgMethod for increasing the capacitance in a storage trenchUS6919257Jun 14, 2002Jul 19, 2005Micron Technology, Inc.Method of forming a capacitorUS6960513Jan 26, 2001Nov 1, 2005Micron Technology, Inc.Capacitor having an electrode formed from a transition metal or a conductive metal-oxide, and method of forming sameUS7012292 *Nov 25, 1998Mar 14, 2006Advanced Technology Materials, IncOxidative top electrode deposition process, and microelectronic device structureUS7026222 *Nov 19, 2002Apr 11, 2006Micron Technology, Inc.Method of forming a capacitorUS7041570 *Nov 19, 2002May 9, 2006Micron Technology, Inc.Method of forming a capacitorUS7091101 *Nov 19, 2002Aug 15, 2006Micron Technology, Inc.Method of forming a deviceUS7442981 *Dec 21, 2005Oct 28, 2008Samsung Electronics Co., Ltd.Capacitor of semiconductor device and method of fabricating the sameUS8110469Aug 30, 2005Feb 7, 2012Micron Technology, Inc.Graded dielectric layers* Cited by examinerClassifications U.S. Classification257/310, 257/E29.343, 257/E21.274, 257/640, 257/E21.648, 257/532, 257/303, 257/301International ClassificationH01L21/8242, H01L29/92, H01L21/316Cooperative ClassificationH01L28/40, H01L27/10852, H01L21/31604European ClassificationH01L28/40Legal EventsDateCodeEventDescriptionJul 25, 2012FPAYFee paymentYear of fee payment: 12Aug 13, 2008FPAYFee paymentYear of fee payment: 8Jul 14, 2004FPAYFee paymentYear of fee payment: 4Jun 26, 1998ASAssignmentOwner name: MICRON TECHNOLOGY, INC., IDAHOFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THAKUR, RANDHIR P.S.;REEL/FRAME:009261/0362Effective date: 19980605Feb 28, 1998ASAssignmentOwner name: MICRON TECHNOLOGY, INC., IDAHOFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AL-SHAREEF, HUSAM N.;DEBOER, SCOTT JEFFERY;GEALY, F. DANIEL;REEL/FRAME:009230/0564Effective date: 19980227RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google