Discharge Devices Having An Electrode Of Particular Material Patents (Class 313/311)
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Publication number: 20090072707Abstract: Electron emission devices include first electrodes on a substrate extending in a first direction and spaced apart from each other. Second electrodes are on the substrate alternating between the first electrodes and extending in a second direction opposing the first direction. First electron emitters and second electron emitters are on side surfaces of the first electrodes and the second electrodes, respectively. Gaps are formed between the first electron emitters and second electron emitters.Type: ApplicationFiled: June 25, 2008Publication date: March 19, 2009Inventors: So-Ra Lee, Jae-Myung Kim, Yoon-Jin Kim, Hee-Sung Moon, Kyu-Nam Joo, Hyun-Ki Park, Young-Suk Cho
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Patent number: 7501750Abstract: An emission device is provided for extracting electrons onto an anode of a visual display. The emission device (10) includes a conductivity limited material (18) positioned between first and second electrodes (14, 16) and having a surface (26). A plurality of catalytic nanoparticles (22) are distributed throughout the conductivity limited material (18), wherein some of the catalytic particles (22) are contiguous to the surface (26). A plurality of nanostructures (24), such as carbon nanotubes, are grown from the catalytic nanoparticles (22) contiguous to the surface (26). A voltage is applied across the conductivity limited material (18) having a plurality of catalytic particles (22) embedded therein, thereby causing the electrons to tunnel between the catalytic particles (22).Type: GrantFiled: May 31, 2005Date of Patent: March 10, 2009Assignee: Motorola, Inc.Inventors: Bernard F. Coll, Kenneth A. Dean, Yi Wei
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Patent number: 7501765Abstract: An ionizer emitter electrode is ideally formed of or at least partially coated with a carbide material, wherein the carbide material is selected from the group consisting of germanium carbide, boron carbide, silicon carbide and silicon-germanium carbide. Alternatively, a corona-producing ionizer emitter electrode is substantially formed of silicon carbide. Alternatively, a corona-producing ionizer emitter electrode is formed of an electrically conductive metal base that is at least partially coated with silicon carbide. Alternatively, a corona-producing ionizer emitter electrode ionizes gas when high voltage is applied thereto, and the emitter electrode is formed substantially of silicon carbide and has a resistivity of less than or equal to about one hundred ohms-centimeter (100 ?-cm).Type: GrantFiled: October 1, 2004Date of Patent: March 10, 2009Assignee: Illinois Tool Works Inc.Inventors: James R. Curtis, John A. Gorczyca
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Fabrication method for carbon fiber, carbon fiber electron source, and field emission display device
Publication number: 20090051267Abstract: A fabrication method for carbon fiber which can prevent abnormal growth from electrode wiring metal, and can be formed a carbon nano-tube with high-density and uniform, by a simple and cheap method and the fabrication method includes process steps: forming a cathode electrode on a substrate; forming a first insulating film on the cathode electrode; forming a gate electrode on the first insulating film; forming a hole which reaches to the cathode electrode surface into the first insulating film; forming a catalyst crystallite nucleus on a bottom of the hole; oxidized forming a second insulating film on the gate electrode surface; and forming a carbon nano-tube on the catalyst crystallite nucleus; a carbon fiber electron source of high-output current density; and FED device which has high-intensity and large capacity with high current density, are provided.Type: ApplicationFiled: August 21, 2008Publication date: February 26, 2009Applicant: ROHM CO., LTD.Inventor: Tomohiro Kato -
Patent number: 7495378Abstract: A dielectric device of higher performance is provided. An electron emitter to which the dielectric device of the present invention is applied includes an emitter formed by a dielectric, and an upper electrode and a lower electrode to which a drive voltage is applied for the purpose of electron emission. The emitter includes an upper layer formed from plural dielectric particles, and a lower layer formed from plural dielectric particles, below the upper layer. The upper layer and/or lower layer are formed by aerosol deposition.Type: GrantFiled: July 13, 2005Date of Patent: February 24, 2009Assignee: NGK Insulators, Ltd.Inventors: Tsutomu Nanataki, Hirofumi Yamaguchi, Nobuyuki Kobayashi
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Patent number: 7492088Abstract: There are provided a method of forming carbon nano tubes, a field emission display device having the carbon nanotubes formed using the method, and a method of manufacturing the field emission display device. The method of forming carbon nanotubes includes forming a catalytic metal layer on a substrate, forming an insulation layer on the catalytic metal layer, and forming carbon nanotubes on the insulation layer.Type: GrantFiled: November 21, 2005Date of Patent: February 17, 2009Assignee: Industry Academic Cooperation Foundation of Kyunghee UniversityInventors: Jin Jang, Kyu-Chang Park, Sung-Hoon Lim
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Patent number: 7482739Abstract: A dielectric device of higher performance is provided. An electron emitter, to which the dielectric device is applied is provided with: an emitter including a dielectric; and an upper electrode and a lower electrode to which drive voltage is applied in order to emit electrons. The emitter is formed by the aerosol deposition method or the sol impregnation method, and the surface roughness of the upper surface thereof is controlled in the range from 0.1 to 3 in Ra.Type: GrantFiled: July 13, 2005Date of Patent: January 27, 2009Assignee: NGK Insulators, Ltd.Inventors: Tsutomu Nanataki, Hirofumi Yamaguchi, Ritsu Tanaka
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Patent number: 7479590Abstract: Disclosed herein is a printed circuit board comprising a laminate that comprises a copper foil; inorganic or metallic nanoparticles having an average diameter of less than 100 nanometers disposed on a surface of the copper foil; the nanoparticles being arranged in domains; the domains having average domain sizes of about 10 to about 100 nanometers and average interdomain spacings of 10 to about 1,000 nanometers; the nanoparticles not facilitating the transfer of an electrical current; a layer of solid organic polymer disposed on the nanoparticles; the layer of the organic polymer being bounded to the nanoparticles by van der Waals forces; the laminate being employed in a printed circuit board.Type: GrantFiled: January 3, 2008Date of Patent: January 20, 2009Assignee: International Business Machines CorporationInventor: Joseph Kuczynski
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Patent number: 7477011Abstract: In an electron emission device, the surface roughness of a substrate with driving electrodes and an insulating layer is optimized. The electron emission device includes first and second substrates facing each other with a predetermined distance therebetween. An electron emission unit is formed on a surface of the first substrate facing the second substrate, and includes electron emission regions, a plurality of driving electrodes, and an insulating layer for insulating the driving electrodes from each other. A light emission unit is formed on a surface of the second substrate facing the first substrate, and includes phosphor layers and an anode electrode. The first substrate satisfies the following condition: 0.5 nm?Ra?1.8 nm, where Ra indicates the average roughness of the surface of the first substrate facing the second substrate.Type: GrantFiled: November 25, 2005Date of Patent: January 13, 2009Assignee: Samsung SDI Co., Ltd.Inventors: Sang-Ho Jeon, Byong-Gon Lee, Sang-Hyuck Ahn, Su-Bong Hong
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Patent number: 7474060Abstract: A light source has a light emission section comprising a two-dimensional array of electron emitters and a drive circuit for applying a drive voltage to each of the electron emitters of the light emission section. The drive circuit applies the drive voltage between upper and lower electrodes of each of the electron emitters based on a control signal representative of turn-on/turn-off from an external source (a turn-on/turn-off switch or the like), for thereby controlling each of the electron emitters. Each of the electron emitters has a plate-like emitter, an upper electrode disposed on a face side of the emitter, and a lower electrode disposed on a reverse side of the emitter.Type: GrantFiled: August 16, 2004Date of Patent: January 6, 2009Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Iwao Ohwada, Takayoshi Akao
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Publication number: 20080315745Abstract: An electronic device including a pair of electrodes disposed on a substrate and carbon nanotubes electrically connecting the electrodes. A method for manufacturing this device in which the electrodes are disposed on the substrate and the nanotubes are prepared to electrically connect the electrodes.Type: ApplicationFiled: August 25, 2008Publication date: December 25, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Tohru Den, Tatsuya Iwasaki
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Patent number: 7468579Abstract: A carbon fiber mixed paper 8 obtained by mixing a fiber blend 7, which is obtained by knitting a carbon fiber and a glass fiber, into a paper material is used as the material for an anode that opposes to an electron emission cathode. A phosphor is applied onto this carbon fiber mixed paper 8, and further, an electrode 9 is provided. The present invention reduces heat generation at the anode as much as possible and enables uniform illumination without providing a diffuser. Moreover, the present invention does not require an electrode made of a transparent conductive film.Type: GrantFiled: February 10, 2005Date of Patent: December 23, 2008Assignee: Dialight Japan Co., Ltd.Inventor: Akio Hiraki
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Patent number: 7466069Abstract: A carbon nanotube device in accordance with the invention includes a support structure including an aperture extending from a front surface to a back surface of the structure. At least one carbon nanotube extends across the aperture and is accessible through the aperture from both the front surface and the back surface of the support structure.Type: GrantFiled: October 29, 2003Date of Patent: December 16, 2008Assignee: President and Fellows of Harvard CollegeInventors: Jene A. Golovchenko, Haibing Peng
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Patent number: 7466071Abstract: A ballistic electron surface-emitting device (BSD) emitter that can be used in a field emission display (FED). The emitter being made of metallic carbon nanotubes extending in a direction that is normal to a surface of the cathode. The carbon nanotubes are designed so that electrons therein can experience a ballistic effect where the mean free path between collisions is as large or larger than a length of the carbon nanotube and that the width of the carbon nanotube being a fermi wavelength. On an opposite end of the carbon nanotubes is a thin metal electrode layer and a thin insulating layer to protect the carbon nanotubes from damage.Type: GrantFiled: February 24, 2005Date of Patent: December 16, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Tae-Sik Oh, Jong-Min Kim
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Patent number: 7462981Abstract: An electron emission device with conductive layers for preventing accumulation of static charges on an insulating layer of the device is shown that does not require an independent driving circuit. The device includes cathode electrodes formed on a substrate and separated from gate electrodes by an insulating layer formed over the cathode electrodes, all inside a partial vacuum chamber. Crossings of cathode and gate electrodes form the display areas while in the non-display areas of the insulating layer, that are susceptible to accumulation of electrostatic charge, conductive layers are formed parallel to the cathode or gate electrodes, for the most part separated from these electrodes by the insulating layer. Outside the device chamber, the conductive layers are electrically coupled to their corresponding electrodes. Conductive layers thus formed and coupled discharge accumulated static charge over the insulating layers inside the device to the outside circuit.Type: GrantFiled: May 26, 2005Date of Patent: December 9, 2008Assignee: Samsung SDI Co., Ltd.Inventor: Seong-Yeon Hwang
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Patent number: 7459839Abstract: An electron source include a first cathode electrode disposed over a substrate and terminated to provide electrons; an emitter layer disposed over the cathode electrode and formed from one or plurality vertically aligned and mono-dispersed nano-structures that are truncated to the same length, embedded in a solid matrix and protruding above the surface for emitting electrons; an insulator disposed over the emitter layer and having one or plurality of apertures, each is self-aligned with and exposes one nano-structure in the emitter layer; and a second gate electrode disposed over the insulator, having one or plurality of apertures self-aligned with the apertures in the insulator and terminated to extract electrons from the exposed nano-structures through the apertures. The gate aperture is substantially less than one micrometer and the gated nano-structures can have a density on the order of 108/cm2.Type: GrantFiled: December 5, 2003Date of Patent: December 2, 2008Inventor: Zhidan Li Tolt
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Patent number: 7459682Abstract: An exemplary spin-polarized electron source includes a cathode, and a one-dimensional nanostructure made of a compound (e.g., group III-V) semiconductor with local polarized gap states. The one-dimensional nanostructure includes a first end portion electrically connected with the cathode and a second end portion located/directed away from the cathode. The second end portion of the one-dimensional nanostructure functions as a polarized electron emission tip and is configured (i.e., structured and arranged) for emitting a spin-polarized electron current/beam under an effect of selectably one of a magnetic field induction and a circularly polarized light beam excitation when a predetermined negative bias voltage is applied to the cathode. Furthermore, a spin-polarized scanning tunneling microscope incorporating such a spin-polarized electron source is also provided.Type: GrantFiled: November 14, 2006Date of Patent: December 2, 2008Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Wen-Hui Duan, Shao-Gang Hao, Gang Zhou, Jian Wu, Bing-Lin Gu
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Patent number: 7445535Abstract: An electron source producing apparatus for forming an electron-emission part on a conductive member disposed on a substrate in an atmosphere containing a desired gas. The apparatus includes a container for forming a hermetic atmosphere between the container and a surface of the substrate on which the conductive member is formed. The container has a gas inlet and a gas outlet. A diffusing member is for diffusing an introduced gas, and is disposed between the gas inlet and the surface of the substrate. A resisting member provides exhaust resistance, and is disposed between the gas outlet and the surface of the substrate and is separated from the gas outlet. The resisting member is disposed closer to the surface of the substrate than is the diffusing member.Type: GrantFiled: December 2, 2004Date of Patent: November 4, 2008Assignee: Canon Kabushiki KaishaInventors: Kazumasa Takatsu, Shigeto Kamata
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Patent number: 7446466Abstract: A field emission light source (100) includes: a cathode (111); a nucleation layer (112) formed on the cathode; a field emission portion (102) formed on the nucleation layer; and a light-permeable anode (117) arranged over the cathode. The field emission portion includes an isolating layer (113) formed on the cathode; a plurality of isolating posts (114) disposed on the isolating layer; and a plurality of field emitters (115) located on the respective isolating posts. The field emitters contain molybdenum. The isolating posts contain silicon carbon. Preferably, the field emitter has a diameter ranging from about 0.5 nanometers to 10 nanometers.Type: GrantFiled: December 5, 2005Date of Patent: November 4, 2008Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Ga-Lane Chen
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Patent number: 7427765Abstract: An electron beam column comprises a thermal field emission electron source to generate an electron beam, an electron beam blanker, a beam shaping module, and electron beam optics comprising a plurality of electron beam lenses. In one version, the optical parameters of the electron beam blanker, beam shaping module, and electron beam optics are set to achieve an acceptance semi-angle ? of from about ¼ to about 3 mrads, where the acceptance semi-angle ? is half the angle subtended by the electron beam at the writing plane. The beam-shaping module can also operate as a single lens using upper and lower projection lenses. A multifunction module for an electron beam column is also described.Type: GrantFiled: October 3, 2005Date of Patent: September 23, 2008Assignee: Jeol, Ltd.Inventors: Benyamin Buller, William J. DeVore, Juergen Frosien, Xinrong Jiang, Richard L. Lozes, Henry Thomas Pearce-Percy, Dieter Winkler, Steven T. Coyle, Helmut Banzhof
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Patent number: 7427826Abstract: There provided is an electron beam apparatus of preventing surface creeping discharge from newly arising due to discharge that arises between an anode electrode and an electron-emitting device. In an electron-emitting device including a scan signal device electrode and an information signal device electrode, a portion of the scan signal device electrode is covered by an insulating layer of insulating scan signal wiring from information signal wiring, an additional electrode is connected to the scan signal device electrode at an end portion of the insulating layer and the additional electrode is configured so that energy Ee being lost due to melting of the additional electrode is larger than energy Ea of discharge current flowing in to the electron-emitting device.Type: GrantFiled: January 13, 2006Date of Patent: September 23, 2008Assignee: Canon Kabushiki KaishaInventors: Jun Iba, Yasuo Ohashi, Hisanobu Azuma, Takahiro Hachisu, Masanori Takahashi
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Publication number: 20080203886Abstract: The present invention relates to a field emission device comprising an anode and a cathode, wherein said cathode includes carbon nanotubes nanotubes which have been subjected to energy, plasma, chemical, or mechanical treatment. The present invention also relates to a field emission cathode comprising carbon nanotubes which have been subject to such treatment. A method for treating the carbon nanotubes and for creating a field emission cathode is also disclosed. A field emission display device containing carbon nanotube which have been subject to such treatment is further disclosed.Type: ApplicationFiled: August 20, 2007Publication date: August 28, 2008Applicant: Hyperion Catalysis International, Inc.Inventors: Mikio Takai, Alan B. Fischer, Chunming Niu, Howard G. Tennent, Robert Hoch, Hans Biebuyck
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Patent number: 7411341Abstract: The present invention relates to gated nanorod field emission devices, wherein such devices have relatively small emitter tip-to-gate distances, thereby providing a relatively high emitter tip density and low turn on voltage. Such methods employ a combination of traditional device processing techniques (lithography, etching, etc.) with electrochemical deposition of nanorods. These methods are relatively simple, cost-effective, and efficient; and they provide field emission devices that are suitable for use in x-ray imaging applications, lighting applications, flat panel field emission display (FED) applications, etc.Type: GrantFiled: August 8, 2007Date of Patent: August 12, 2008Assignee: General Electric CompanyInventors: Heather Diane Hudspeth, Reed Roeder Corderman, Renee Bushey Rohling, Lauraine Denault
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Publication number: 20080152943Abstract: The invention is directed to a process for the creation of a photonic lattice on the surface of an emissive substrate comprising first depositing a thin film metal layer on at least one surface of the substrate, the thin film metal comprising a metal having a melting point lower than the melting point of the substrate, then annealing the thin film metal layer and the substrate to create nano-particles on the substrate surface, and anodizing or plasma etching the annealed thin film metal and substrate to create pores in the nano-particles and the substrate such that upon exposure to high temperature the emissivity of the substrate is refocused to generate emissions in the visible and lower infrared region and to substantially eliminate higher infrared emission, and to the substrate thus created.Type: ApplicationFiled: December 20, 2006Publication date: June 26, 2008Inventor: Deeder M. Aurongzeb
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Patent number: 7391144Abstract: A carbon-based composite particle for an electron emission source comprises a particle of a material selected from the group consisting of metals, oxides, and ceramic materials; and a carbon-based material such as a carbon nanotube which is partially embedded inside the particle and which partially protrudes from the surface of the particle.Type: GrantFiled: April 8, 2004Date of Patent: June 24, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Tae-Ill Yoon, Jong-Woon Moon, Sung-Hee Cho, Sung-Kee Kang, Hun-Young Kim, Hyun-Jung Lee
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Patent number: 7391145Abstract: A cold-cathode electron source is formed that successfully achieves a high frequency and a high output. Embodiments include a cold-cathode electron source comprising emitters having a tip portion tapered at an aspect ratio R of not less than 4, thereby decreasing capacitance between the emitters and a gate electrode by a degree of declination from the gate electrode, such that the cold-cathode electron source is able to operate at a high frequency. Embodiments also include a cold-cathode electron source formed of a diamond with a high melting point and a high thermal conductivity, such that the emitters operate at a high current density and at a high output.Type: GrantFiled: August 26, 2005Date of Patent: June 24, 2008Assignee: Sumitomo Electric Industries, Ltd.Inventors: Natsuo Tatsumi, Takahiro Imai
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Patent number: 7388201Abstract: A radiation detector has an electron emitter that includes a coated nanostructure on a support. The nanostructure can include a plurality of nanoneedles. A nanoneedle is a shaft tapering from a base portion toward a tip portion. The tip portion has a diameter between about 1 nm to about 50 nm and the base portion has a diameter between about 20 nm to about 300 nm. Each shaft has a length between about 100 nm to about 3,000 nm and an aspect ratio larger than 10. A coating covers at least the tip portions of the shafts. The coating exhibits negative electron affinity and is capable of emitting secondary electrons upon being irradiated by radiation. The nanostructure can also include carbon nanotubes (CNTs) coated with a material selected from the group of aluminum nitride (AlN), gallium nitride (GaN), and zinc oxide (ZnO).Type: GrantFiled: May 13, 2005Date of Patent: June 17, 2008Assignees: National University of Singapore, Agency for Science, Technology and Research, Pohang University of Science and Technology, Nanyang Technological UniversityInventors: Marian Cholewa, Shu Ping Lau, Gyu-Chul Yi, Jin Kyoung Yoo, Adrian Paul Burden, Lei Huang, Xingyu Gao, Andrew Thye Shen Wee, Herbert Oskar Moser
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Patent number: 7377962Abstract: A discharge device for generating a streamer discharge includes a discharge electrode and a counter electrode. The discharge electrode is in a shape of a wire or rod and is disposed substantially parallel to the counter electrode. Thus, even when a tip of the discharge electrode becomes worn out, a shape of the tip of the discharge electrode remains unchanged and a distance between the discharge electrode and the counter electrode remains unchanged. As a result, even when the tip of the discharge electrode becomes worn out, the streamer discharge stability will not fall.Type: GrantFiled: June 22, 2004Date of Patent: May 27, 2008Assignee: Daikin Industries, Ltd.Inventors: Toshio Tanaka, Kanji Motegi, Kenkichi Kagawa
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Patent number: 7375460Abstract: There is provided an electron emitting device, including a substrate, a pair of electrodes formed on the substrate and spaced apart from each other, a pair of electrically conductive layers formed on the electrodes, respectively, a distance between the electrically conductive layers being shorter than a distance between the electrodes, and an electron emitting layer formed between the electrically conductive layers and containing carbon and tin.Type: GrantFiled: June 4, 2003Date of Patent: May 20, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Yoshiki Ishizuka, Katsuyuki Naito, Masahiko Yamamoto
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Patent number: 7372193Abstract: A cold cathode light emitting device includes a plurality of first electrodes, a plurality of insulating layers, a plurality of second electrodes and a third electrode. The insulating layers are laminated on the first electrodes. The second electrodes are provided on the insulating layers to intersect the first electrodes. The third electrode emits light upon receipt of electrons. At least one hole is provided at intersections of the first electrodes and second electrodes. The hole has a first diameter d1 at a position where the insulating layers are in contact with the first electrodes and a second diameter d2 at a position where the insulating layers are in contact with the second electrodes, where d1 is smaller than d2. A nanofiber-structure layer is formed on the first electrodes in an opening portion having the first diameter d1, provided in the at least one hole on the side of the first electrodes.Type: GrantFiled: March 30, 2004Date of Patent: May 13, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Yoshinobu Hirokado
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Patent number: 7372194Abstract: Disclosed is an electron emission source composition for a flat panel display using the same, comprising carbon nanotubes, a vehicle, and an organotitanium or an organometallic compound, and a method of producing the electron emission source composition having improved adherent strength with the substrate and providing stable and uniform electron emitting characteristics.Type: GrantFiled: January 12, 2005Date of Patent: May 13, 2008Assignee: Samsung SDI Co., Ltd.Inventor: Jong-Woon Moon
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Publication number: 20080106181Abstract: A method of making an electron-emitting device has the steps of disposing a film containing metal on a substrate, arranging a plurality of catalytic particles on the film containing metal, and heat-treating the substrate on which the plurality of catalytic particles are arranged under circumstance including hydrocarbon gas and hydrogen to form a plurality of carbon fibers. Catalytic particles contain Pd and at least one element selected from the group consisting of Fe, Co, Ni, Y, Rh, Pt, La, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er and Lu, and 20˜80 atm % (atomic percentage) or more of the at least one element is contained in the catalytic particles relative to Pd.Type: ApplicationFiled: December 13, 2005Publication date: May 8, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Shinichi Kawate, Takeo Tsukamoto
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Patent number: 7365493Abstract: A device is proposed for producing high-frequency microwaves, having a cathode arrangement with heatable cathodes for emitting electrons, two grating arrangements for controlling and focusing the electrons flow and an anode for recaiving the electrons passing through the grating arrangements. The cathode arrangement and the first grating arrangement and also a blocking or choke element define an output cavity forming a resonance cavity and the anode and the second grating arrangement define an output cavity likeeise forming a resonance cavity. The cathode arrangement has a monuting for the cathode such that deformation of the cathode with reduction of the spacing between the heatable cathode and grating is avoided.Type: GrantFiled: March 4, 2002Date of Patent: April 29, 2008Assignee: Kist Europe Korea Institute of Science and Technology Europe Forschungsgesellschaft mbHInventors: Chun Sik Lee, Hyeck-Hee Lee, Min-Suk Lee
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Patent number: 7365482Abstract: A field emission display includes first and second substrates provided opposing one another with a predetermined gap therebetween; electron emission sources provided on one of the first and second substrates; an electron emission inducing assembly for inducing the emission of electrons from the electron emission sources; and an illuminating assembly provided on the substrate on which the electron emission sources are not formed, the illuminating assembly realizing images by the emission of electrons from the electron emission sources. The electron emission sources include a carbon nanotube layer and a base layer, the base layer connecting the carbon nanotube layer to the substrate and applying a voltage to the carbon nanotube layer required for the emission of electrons. Also, the carbon nanotube layer is provided on the base layer in a state substantially un-mixed with the base layer.Type: GrantFiled: October 15, 2003Date of Patent: April 29, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Mee-Ae Ryu, Hun-Young Kim, Joong-Woo Nam
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Patent number: 7359049Abstract: A light source device for a spectrophotometer includes a light source chamber, a light source retained in the light source chamber and having an electrode therein for generating light, an electrode support part connected to the electrode and extending outside the light source chamber, and a cover disposed around the electrode support part for covering a portion of the electrode support part situated outside the light source chamber. A cooling mechanism is installed for cooling the light source chamber from an outside thereof so that the light source is not directly cooled by means of the cover. The spectrophotometer includes the light source device.Type: GrantFiled: March 15, 2005Date of Patent: April 15, 2008Assignee: Shimadzu CorporationInventor: Takeshi Fujita
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Patent number: 7355330Abstract: Graphite comprises atoms arranged in discrete layers (100). The perpendicular distance between these layers is the ‘d-spacing’ (101). A field emission material is obtained by expanding the d-spacing (102). Such expansion may be achieved by an intercalant that has been introduced between layers of the material. Such an intercalant may reside, or may no longer reside, in the material. The material may be placed in position on a substrate by a printing process, prior to expansion. Such field emission material may be used in cold cathodes in field electron emission devices.Type: GrantFiled: March 11, 2002Date of Patent: April 8, 2008Assignee: Printable Field Emitters LimitedInventors: Adrian Paul Burden, Stephen Michael Baigrie
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Patent number: 7355329Abstract: A field emission lamp includes: a transparent bulb (10) having a neck portion; a lamp head mated with the neck portion; an anode layer (20) formed on an inner surface of the bulb; a fluorescence layer (30) formed on the anode layer; a cathode electrode (43) and an anode electrode (23) located at the lamp head; an anode down-lead ring (24) located at the neck portion, the anode down-lead ring engaging with the anode layer and electrically connecting with the anode electrode via an anode down-lead pole (21) and a pair of down-leads (22); and an electron emitting cathode positioned in the bulb and engaging with the cathode electrode. The field emission lamp is safe for humans and environmentally friendly, provides a high electrical energy utilization ratio, and has a reduced cost.Type: GrantFiled: July 19, 2005Date of Patent: April 8, 2008Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Yang Wei, Peng Liu, Lei-Mei Sheng, Liang Liu, Zhao-Fu Hu, Cai-Lin Guo, Pi-Jin Chen, Shou-Shan Fan
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Electron beam generator device having carbon nanotube structure with a crosslinked network structure
Patent number: 7355334Abstract: An electron beam generator device includes a base body having a conductive surface and a electron-emission electrode having a carbon nanotube structure on the conductive surface of the substrate. The carbon nanotube structure constitutes a network structure which has plural carbon nanotubes and a crosslinked part including a chemical bond of plural functional groups. The chemical bond connects one end of one of the carbon nanotubes to another one of the carbon nanotubes. A method for producing an electron beam generator device, includes applying plural carbon nanotubes each having a functional group onto a conductive surface of a base body, and crosslinking the functional groups with a chemical bond to form a crosslinked part, thereby forming a carbon nanotube structure constituting a network structure having plural carbon nanotubes electrically connected to each other.Type: GrantFiled: September 3, 2004Date of Patent: April 8, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Kazunori Anazawa, Chikara Manabe, Kentaro Kishi, Taishi Shigematsu, Miho Watanabe, Masaki Hirakata, Takashi Isozaki, Hiroyuki Watanabe, Shigeki Ooma, Shinsuke Okada -
Patent number: 7352559Abstract: Electrical devices which incorporate electrodes coated with carbon nanotubes. An anode is placed in conductive relationship with the coated electrode. A gas medium is placed between the electrode and anode which medium also participates in the transfer of electrons. Using specific gas media in combination with nanotube coated electrodes allows for the production of electromagnetic radiation sources which have extended life, reduced power requirements, and significantly decreased operating temperatures.Type: GrantFiled: August 1, 2006Date of Patent: April 1, 2008Inventor: Chien-Min Sung
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Patent number: 7348719Abstract: An electron-emitting device comprises a pair of oppositely disposed electrodes and an electroconductive film arranged between the electrodes and including a high resistance region. The high resistance region has a deposit containing carbon as a principal ingredient. The electron-emitting device can be used for an electron source of an image-forming apparatus of the flat panel type.Type: GrantFiled: December 13, 2004Date of Patent: March 25, 2008Assignee: Canon Kabushiki KaishaInventors: Toshikazu Ohnishi, Masato Yamanobe, Ichiro Nomura, Hidetoshi Suzuki, Yoshikazu Banno, Takeo Ono, Masanori Mitome
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Patent number: 7348718Abstract: A discharge electrode emitting electrons into a discharge gas, encompasses an emitter and current supply terminals configured to supply electric current to the emitter. The emitter embraces a wide bandgap semiconductor having at 300 K a bandgap of 2.2 eV or wider. Acceptor impurity atoms and donor impurity atoms being doped in the wide bandgap semiconductor, the activation energy of the donor impurity atoms being larger than the activation energy of the acceptor impurity atoms.Type: GrantFiled: July 27, 2004Date of Patent: March 25, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Tadashi Sakai, Tomio Ono, Naoshi Sakuma, Mariko Suzuki, Hiroaki Yoshida
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Publication number: 20080054779Abstract: There is provided a substrate for a surface light source device, comprising a first secondary electron emission layer including crystalline magnesium oxide (MgO) powder on a surface of the substrate. There is also provided a surface light source device comprising a first substrate and a second substrate facing each other at a predetermined distance between which a discharge space is formed; and an electrode to apply a discharge voltage to the discharge space, wherein a first secondary electron emission layer including crystalline MgO powder is formed on a surface of at least one of the first substrate and the second substrate. Preferably, the crystalline MgO powder is obtained by grinding an MgO sputtering target.Type: ApplicationFiled: August 29, 2007Publication date: March 6, 2008Applicant: Samsung Corning Co., Ltd.Inventors: Kyeong Taek Jung, Ki Yeon Lee, Hyung Bin Youn, Keun Seok Lee, Dong Hee Lee
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Patent number: 7336026Abstract: An electron emitter has an emitter made of a dielectric material and an upper electrode and a lower electrode for being supplied with a drive voltage for emitting electrons. The upper electrode is disposed on an upper surface of the emitter, and the lower electrode is disposed on a lower surface of the emitter. The upper electrode has a plurality of through regions through which the emitter is exposed. Each of the through regions of the upper electrode has a peripheral portion having a surface facing the emitter and spaced from the emitter.Type: GrantFiled: September 27, 2004Date of Patent: February 26, 2008Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Iwao Ohwada, Takayoshi Akao
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Publication number: 20080042547Abstract: The present invention provides a field emission system and a method for improving its vacuum. The present invention employs aging surface-unsaturated carbon nanotubes in non-display areas of the field emission system as getter material to absorb residual gas within the system so as to improve its vacuum. The present method for improving vacuum of the field emission system can be integrated with the standard process of a field emission display device without additional fabricating steps, and thus facilitating the mass production of the field emission display device.Type: ApplicationFiled: November 7, 2006Publication date: February 21, 2008Inventors: Yu-Han Chien, Chih-Ping Peng, Chuan-Hsu Fu, Wei-Yi Lin, Lih-Hsiung Chan
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Patent number: 7322869Abstract: A structure of a coplanar gate-cathode of triode CNT-FED and a manufacturing method thereof by Imprint Lithography and ink jet. The structure includes a substrate, a plurality of cathode layers, a plurality of gate extended layers, a plastic dielectric layer, a plurality of dielectric openings, and a plurality of gate electrodes. The plurality of cathode layers and the plurality of gate extended layers are coplanar, and formed on the substrate by Imprint Lithography and the plurality of dielectric openings are made by Imprint Lithography. The gate electrode, made by ink jet or screen print, can be extended through the plastic dielectric layer to the gate extended electrode to feature the coplanar gate-cathode.Type: GrantFiled: July 21, 2006Date of Patent: January 29, 2008Assignee: Industrial Technology Research InstituteInventors: Ching-Hsun Chao, Jane-Hway Liao, Jyh-Rong Sheu, Yu-Yang Chang, Cheng-Chung Lee
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Patent number: 7321188Abstract: A light filament (206) formed from carbon nanotubes is characterized by high mechanical strength and durability at elevated temperatures, a high surface area to volume ratio, and high emissivity. Additionally, electrical resistance of the light filament does not increase with increasing temperature as much as electrical resistance of conventional metallic light filaments. Accordingly, power consumption of the light filament is low at incandescent operating temperatures.Type: GrantFiled: October 21, 2005Date of Patent: January 22, 2008Assignees: Tsing Hua University, Hon Hai Precision Industry Co., Ltd.Inventors: KaiLi Jiang, ShouShan Fan, QunQing Li
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Publication number: 20080012466Abstract: A field emission device (10) includes a sealed container (12) with a light permeable portion (120). A phosphor layer (14) and a light permeable anode (16) are coated on inside surface of the light permeable portion in succession. A cathode (18) is enclosed in the sealed container. A carbon nanotube yarn is attached to the cathode facing the light permeable portion. Before being embedded into the sealed container, the carbon nanotube yarn is processed in the following steps: providing a carbon nanotube array, drawing out at least one carbon nanotube yarn string from the carbon nanotube array, treating the at least one carbon nanotube yarn string using an organic solvent in a manner such that the at least one carbon nanotube yarn string is formed into a single strand of carbon nanotube yarn, and heating the single strand of the carbon nanotube yarn.Type: ApplicationFiled: November 16, 2006Publication date: January 17, 2008Applicants: TSINGHUA UNIVERSITY, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: YUAN-CHAO YANG, YANG WEI, LIANG LIU, KAI-LI JIANG, SHOU-SHAN FAN
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Publication number: 20080007152Abstract: An electron emitting element includes a vacuum container 3, electron sources that emit an electron beam, and a power supply structure 4 that supplies a voltage to the electron sources. The electron sources are formed on a silicon substrate 21. The power supply structure 4 is disposed outside the vacuum container 3.Type: ApplicationFiled: July 3, 2007Publication date: January 10, 2008Applicant: MT Picture Display Co., Ltd.Inventors: Masahide Yamauchi, Makoto Yamamoto
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Patent number: 7317277Abstract: This invention provides compositions of matter that contain an electron emitting substance and an expansion material. The expansion material may, for example, be an intercalation compound. When a film is formed from the composition, expansion of the expansion material typically causes rupturing or fracturing of the film. No further treatment of the surface of the film is typically required after expansion of the expansion material to obtain good emission properties. A surface formed from such a fractured film acts as an efficient electron field emitter and thus is useful in vacuum microelectronic devices.Type: GrantFiled: April 23, 2003Date of Patent: January 8, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Lap-Tak Andrew Cheng, David Herbert Roach
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Patent number: RE40566Abstract: A display device consisting of an electron-emitting device which is a laminate of an insulating layer and a pair of opposing electrodes formed on a planar substrate. A portion of the insulating layer is between the electrodes and a portion containing an electron emitting region in between one electrode and the substrate. Electrons are emitted from the electron emission region by a voltage to the electrodes, thereby stimulating a phosphorous to emitting light.Type: GrantFiled: August 26, 1999Date of Patent: November 11, 2008Assignee: Canon Kabushiki KaishaInventors: Seishiro Yoshioka, Ichiro Nomura, Hidetoshi Suzuki, Toshihiko Takeda, Tetsuya Kaneko, Yoshikazu Banno, Kojiro Yokono