Electrode Shaping Patents (Class 445/49)
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Publication number: 20080265744Abstract: A method of forming a wiring of a light emitting device having an electrode on a light emission surface is disclosed. The method includes: forming the electrode nearly in a linear shape in which the width is narrower than the light emission surface; and forming a wiring that is connected to the electrode nearly in a linear shape in which the width is narrower than the light emission surface to cross the electrode.Type: ApplicationFiled: October 3, 2007Publication date: October 30, 2008Applicant: Sony CorporationInventor: Masato Doi
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Patent number: 7438622Abstract: The present invention provides a field emitter electrode and a method for fabricating the same. The method comprises the steps of mixing a carbonizable polymer, carbon nanotubes and a solvent to prepare a carbon nanotube-containing polymer solution, electrospinning (or electrostatic spinning) the polymer solution to form a nanofiber web layer on a substrate, stabilizing the nanofiber web layer such that the polymer present in the nanofiber web layer is crosslinked, and carbonizing the nanofiber web layer such that the crosslinked polymer is converted to a carbon fiber.Type: GrantFiled: February 25, 2005Date of Patent: October 21, 2008Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Seung Hyun Ra, Kay Hyeok An, Young Hee Lee, Jong Myeon Lee
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Publication number: 20080242182Abstract: A method of forming electrodes of a plasma display panel comprises forming a first metal layer on a substrate, forming a second metal layer on the first metal layer using an offset printing method, forming first electrodes by baking the second metal layer, and forming second electrodes by etching the first metal layer using the first electrodes as masks.Type: ApplicationFiled: March 28, 2008Publication date: October 2, 2008Inventors: Chul-Hong Kim, Hyun-Mi Jeong, Yeon-Joo Choi, Min-Hee Lee
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Publication number: 20080239610Abstract: Disclosed is a chip scale gas discharge protective device whose metal coupled electrodes are fabricated through processes of yellow light, image formation, and electro-casting of metal electrode, and the two electrodes are facing each other in arch lines with the distance of a gap controlled within the range of 0.5˜10 ?m, wherein the entire structure is performed by a bridge process without an extra gas filling procedure in the gap. Due to the fact that the gap is as small as only several ?m, a relevant potential difference existing across there is sufficient to ionize the air thereby suppressing the electro-static discharge (ESD) through the protected electronic device, whereas the fabrication method is disclosed.Type: ApplicationFiled: March 26, 2007Publication date: October 2, 2008Inventors: Ho-Chieh Yu, Jiun-You Lin, Hung-Yi Chuang, Tsai-Pao Chiang
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Publication number: 20080231191Abstract: The invention relates to an electrode for a high intensity discharge lamp, at least consisting of an electrode head (2), which has a spherical shape, and an electrode base (1), wherein, in the direction perpendicular to the longitudinal axis of the electrode, the electrode head (2) has a greater dimension than the electrode base (1) at the transition between electrode head (2) and electrode base (1), and a spherical electrode tip (3) is arranged on the electrode head (2), which electrode tip, in the direction perpendicular to the longitudinal axis of the electrode, has a smaller maximum dimension than the electrode head (2). A cylindrical protrusion (4) is arranged on the electrode tip (3), which cylindrical protrusion, in the direction perpendicular to the longitudinal axis of the electrode, has a smaller maximum dimension than the adjoining electrode tip (3). The electrode can be produced from a one-piece blank.Type: ApplicationFiled: May 8, 2006Publication date: September 25, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventor: Pavel Pekarski
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Publication number: 20080218068Abstract: A method of making an inorganic light-emitting diode display having a plurality of light-emitting elements including providing a substrate, and forming a plurality of patterned electrodes over the substrate. A raised area is formed around each patterned electrode to provide a well before depositing a dispersion containing inorganic, light-emissive core/shell nano-particles into each well. The dispersion is dried to form a light-emitting layer including the inorganic, light-emissive core/shell nano-particles. An unpatterned, common electrode is formed over the light-emitting layer. The light-emitting layer emits light by the recombination of holes and electrons supplied by the electrodes.Type: ApplicationFiled: March 5, 2007Publication date: September 11, 2008Inventor: Ronald S. Cok
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Patent number: 7419416Abstract: A method of manufacturing an electron emission element, including forming common wire electrodes (signal lines) (4a, 4b) on a substrate (1) and forming electron emission units including fibrous material assemblies (6a, 6b) on the common wire electrodes (4a, 4b), respectively, for preventing abnormal discharge caused by an antistatic film (7) with no deterioration in characteristics of the electron emission element. The electrode forming is followed by forming resist patterns (40a, 40b) covering at least part of the common wire electrodes (4a, 4b) before the antistatic film is formed. Thereafter the resist patterns (40a, 40b) on the common wire electrodes (4a, 4b) are removed together with the antistatic film (7) before the electron emission unit is formed, so that the electron emission units made of the fibrous material assemblies (6a, 6b) are formed on the common wire electrodes (4a, 4b) from which the resist patterns (40a, 40b) have been removed.Type: GrantFiled: December 23, 2004Date of Patent: September 2, 2008Assignee: Canon Kabushiki KaishaInventor: Takeo Tsukamoto
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Publication number: 20080194168Abstract: A method for manufacturing a triode type cathode structure including depositing and etching: a cathode layer as cathode conductors; a grid layer as grid conductors; an electrical insulation layer and the grid conductors until reaching a resistive layer to provide cavities; and the cathode conductors to have a perforated structure at the intersection of the cathode conductors and grid conductors.Type: ApplicationFiled: May 29, 2006Publication date: August 14, 2008Applicant: CONNISSARIAT A L'ENERGIE ATOMIQUEInventors: Robert Meyer, Brigitte Montmayeul
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Publication number: 20080185950Abstract: An electric lamp provided with a bulb (1) of quartz glass and a metal electrode rod (3;21,22). The electrode rod (3;21,22) is at least partly embedded in the quartz glass material of the bulb. At least a major part of the surface of the electrode rod (3;21,22) that is in contact with the quartz glass material is provided with grooves (6) having a substantially longitudinal direction.Type: ApplicationFiled: January 24, 2006Publication date: August 7, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Peter Claus, Ger Van Hees, Jan De Laet, Luc Smets
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Publication number: 20080170668Abstract: A micro X-ray source comprising a target acting as anode, and a cathode, which during operation interacts with the target and functions as electron source, wherein the target is embodied as a metal foil possessing a spot where the electrons from the electron source arrive, and the metal foil being locally thinner at the spot.Type: ApplicationFiled: September 7, 2007Publication date: July 17, 2008Applicant: Technische Universiteit DelftInventors: Pieter Kruit, Cornelis Wouter Hagen, Elvira Hendrika Mulder
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Patent number: 7399214Abstract: The step of forming an opening in an insulating layer to expose a carbon nanotube layer is performed using two types of dry etching different from each other in conditions. In the first-stage dry etching step, a hole is formed in the insulating layer to such a depth as not exposing the carbon nanotube layer. Thereafter, in the second-stage dry etching step, a bottom surface portion of the hole is removed, thus exposing an upper surface of the carbon nanotube layer. A method of manufacturing an electron emission source capable of improving performance of an electron emission portion is thus obtained.Type: GrantFiled: May 3, 2006Date of Patent: July 15, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kunihiko Nishimura, Naoki Yasuda, Yosuke Suzuki, Yoshinobu Hirokado, Satoru Kawamoto
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Publication number: 20080122342Abstract: A light emission device and a method of manufacturing the light emission device are provided. A method of manufacturing a light emission device includes forming a first electrode on a substrate to have an active portion and a main pad extending along a first direction of the substrate, forming an insulating layer on the substrate while exposing at least a portion of the main pad, forming a second electrode layer on an entire surface of the substrate, and patterning the second electrode layer to form an active portion and a pad of a second electrode extending along a second direction of the substrate and to form a sub-pad on the main pad.Type: ApplicationFiled: August 7, 2007Publication date: May 29, 2008Inventor: Sang-Hyuck Ahn
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Patent number: 7367860Abstract: A vacuuming sintering method for forming a carbon nanotube of a field display is disclosed. A cathode is attached to an anode, and the assembly of the cathode and anode is disposed on a heating element of a vacuum sintering furnace with cathode adjacent to the heating element. Each of the cathode and anode has at least one electrode lead connected to an external voltage source. The internal pressure of the vacuum sintering furnace is reduced, the heating element is activated, and a voltage is provided across the cathode and the anode, such that an electric field is generated between the cathode and the anode. The voltage is switched off after the electric field is formed and continuing heating for a predetermined period of time.Type: GrantFiled: July 6, 2004Date of Patent: May 6, 2008Assignee: Teco Nanotech Co., Ltd.Inventors: Chih-Che Kuo, Wei-Sheng Hsu, Chun-Yen Hsiao
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Patent number: 7357690Abstract: An alignment unit and an alignment method for aligning needle-like structures. The alignment unit includes a substrate having a surface and grooves defined in the surface. The grooves are sized and arranged such that when the needle-like structures are received therein, the needle-like structures are aligned.Type: GrantFiled: November 17, 2004Date of Patent: April 15, 2008Assignee: Canon Kabushiki KaishaInventors: Yuji Tsuruoka, Kazuo Iwata, Kazuhiro Jindai, Hidehito Takayama, Eiichi Motai, Takashi Mori
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Publication number: 20080081534Abstract: In a method for forming a metal line, a first metal layer and a second metal layer are deposited on a substrate. The first metal layer includes aluminum, and the second metal layer includes molybdenum. A photoresist pattern having a line-shape is formed on the second metal layer. The second metal layer is etched with a chlorine-containing etching gas using the photoresist pattern as a mask. The first metal layer is then etched with a mixture of a chlorine-containing gas and nitrogen gas and/or a mixture of a chlorine-containing gas and argon gas as an etching gas. Impurities such as chlorine ions are removed from the base substrate after etching the first metal layer with a fluorine-containing gas, hydrogen gas, or water vapor. A method for manufacturing a display substrate is disclosed using the method for forming a metal line to form source, drain, and gate electrodes and gate lines.Type: ApplicationFiled: September 27, 2007Publication date: April 3, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Min-Seok Oh, Sang-Gab Kim, Shin-Il Choi, Hong-Kee Chin, Yu-Gwang Jeong, Seung-Ha Choi
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Publication number: 20080074026Abstract: A field emission electron source includes a substrate. A wiring layer is formed on the substrate, and an insulation layer is formed over the wiring layer. In the insulation layer, a plurality of through holes are provided, and conductive via plugs are disposed in the through holes. A diamond layer is formed to cover tops of the insulation layer and the conductive via plugs.Type: ApplicationFiled: August 29, 2007Publication date: March 27, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tadashi Sakai, Tomio Ono, Naoshi Sakuma, Hiroaki Yoshida, Mariko Suzuki
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Patent number: 7348552Abstract: A method for the production of a multipolar electrode configuration (1) for focussing or mass filtration of a beam of charged particles includes attaching a number of round-pole shaped electrode blanks (9)—but only a fraction of the total number of electrodes (2) required for said electrode configuration (1)—to one or a number of support elements (4); simultaneous processing of the end parts (6) of the support element(s) (4) and of the electrode blanks (9) attached to the support element(s) (4) in one process step in such a way that each electrode blank (9) is processed into an electrode (2) with a cross section, having a circular section (KA) and a non-circular, section (HA), and at the end of said simultaneous processing the support element(s) (4) having two differently shaped end parts (6), whereby the respective shapes of said end parts (6) are adapted to each other.Type: GrantFiled: November 11, 2005Date of Patent: March 25, 2008Assignee: VACUTEC Hochvakuum- & Präzisionstechnik GmbHInventor: Bernd Laser
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Patent number: 7341498Abstract: Field emission devices comprising carbon nanotube mats which have been treated with laser or plasma are provided. Mats are formed from carbon nanotubes, also known as carbon fibrils, which are vermicular carbon deposits having diameters of less than about one micron. The carbon nanotube mats are then subjected to laser or plasma treatment. The treated carbon nanotube mat results in improved field emission performance as either a field emission cathode or as part of a field emission device.Type: GrantFiled: July 9, 2004Date of Patent: March 11, 2008Assignee: Hyperion Catalysis International, Inc.Inventors: Mikio Takai, Alan Fischer, Lein Ngaw, Chunming Niu
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Patent number: 7318763Abstract: A structure includes a substrate and a metallized carbon nano-structure extending from a portion of the substrate. In a method of making a metallized carbon nanostructure, at least one carbon structure formed on a substrate is placed in a furnace. A metallic vapor is applied to the carbon nanostructure at a preselected temperature for a preselected period of time so that a metallized nanostructure.Type: GrantFiled: November 10, 2004Date of Patent: January 15, 2008Assignee: General Electric CompanyInventors: Loucas Tsakalakos, Sung Su Han, John Aibangbee Osaheni, Vanita Mani
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Patent number: 7306503Abstract: Evaporation and condensation of carbon is effected by arc discharge between an anode formed of a carbon electrode and a cathode disposed facing the carbon electrode 2 in an inert gas atmosphere, and at the same time, the generated carbon nanotubes are dispersed into an inert gas and transported along with the inert gas through a transporting tube, and a jet of the inert gas containing the carbon nanotubes is emitted from a nozzle, thereby forming carbon nanotubes on a target substrate. This provides a carbon nanotube manufacturing method wherein carbon nanotubes are generated with a simple process, and the CNT patterning process is simplified by forming a carbon nanotube film on a substrate, thereby reducing costs.Type: GrantFiled: October 2, 2003Date of Patent: December 11, 2007Assignee: Canon Kabushiki KaishaInventors: Yasuyuki Saito, Junri Ishikura
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Patent number: 7276844Abstract: This invention provides a process for improving the field emission of an electron field emitter comprised of an acicular emitting substance such as acicular carbon, an acicular semiconductor, an acicular metal or a mixture thereof, comprising applying a force to the surface of the electron field emitter wherein the force results in the removal of a portion of the electron field emitter thereby forming a new surface of the electron field emitter.Type: GrantFiled: April 15, 2005Date of Patent: October 2, 2007Assignee: E. I. du Pont de Nemours and CompanyInventors: Robert Joseph Bouchard, Lap-Tak Andrew Cheng, John Gerald Lavin, David Herbert Roach
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Patent number: 7268480Abstract: A field emission device manufactured by the disclosed method and employed in a display unit includes a glass substrate, an emitter electrode formed on the glass substrate, a carbon nanotube (CNT) emitter formed on the emitter electrode, and a gate stack formed around the CNT emitter. Electron beams are extracted from the CNT emitter and the extracted electron beams are focused onto a given position. The gate stack includes a mask layer that covers the emitter electrode provided around the CNT emitter, a gate insulating layer and a gate electrode sequentially formed on the mask layer, a focus gate insulating layer having double inclined planes facing the CNT emitter on the gate electrode, and focus gate electrode coated on the focus gate insulating layer.Type: GrantFiled: December 3, 2004Date of Patent: September 11, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Jun-Hee Choi, Andrei Zoulkarneev
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Patent number: 7247073Abstract: An organic light emitting device (OLED) is disclosed for which the hole transporting layer, the electron transporting layer and/or the emissive layer, if separately present, is comprised of a non-polymeric material. A method for preparing such OLED's using vacuum deposition techniques is further disclosed.Type: GrantFiled: October 15, 2004Date of Patent: July 24, 2007Assignee: The Trustees of Princeton UniversityInventors: Gong Gu, Paul Burrows, Stephen R. Forrest
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Patent number: 7244159Abstract: A method for producing an electromagnetic-shielding transparent window member including a transparent film and a patterned conductor disposed thereon includes the steps of applying a resin coating material containing a catalyst for electroless plating to the transparent film to form a patterned resin having the same pattern as the patterned conductor to be formed; and depositing a conductive material only on the patterned resin by electroless plating to form the patterned conductor.Type: GrantFiled: April 12, 2005Date of Patent: July 17, 2007Assignee: Bridgestone CorporationInventor: Hidefumi Kotsubo
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Patent number: 7234985Abstract: An electron-emitting device comprises a pair of electrodes and an electroconductive film arranged between the electrodes and including an electron-emitting region carrying a graphite film. The graphite film shows, in a Raman spectroscopic analysis using a laser light source with a wavelength of 514.5 nm and a spot diameter of 1 ?m, peaks of scattered light, of which 1) a peak (P2) located in the vicinity of 1,580 cm?1 is greater than a peak (P1) located in the vicinity of 1,335 cm?1 or 2) the half-width of a peak (P1) located in the vicinity of 1,335 cm?1 is not greater than 150 cm?1.Type: GrantFiled: February 28, 2006Date of Patent: June 26, 2007Assignee: Canon Kabushiki KaishaInventors: Fumio Kishi, Masato Yamanobe, Takeo Tsukamoto, Toshikazu Ohnishi, Keisuke Yamamoto, Sotomitsu Ikeda, Yasuhiro Hamamoto, Kazuya Miyazaki
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Patent number: 7204739Abstract: A cathode panel for a cold cathode field emission display, comprising; (a) a plurality of main wirings, (b) a plurality of branch wirings extending from each main wiring, and (c) cold cathode electron emitting portions connected to the branch wirings, wherein a branch wiring connecting a cold cathode electron emitting portion defective in operation and a main wiring is cut off.Type: GrantFiled: April 26, 2005Date of Patent: April 17, 2007Assignee: Sony CorporationInventors: Yukihiro Kamide, Shinji Kubota, Hiroshi Sata, Kazuo Kikuchi
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Patent number: 7201627Abstract: A method for manufacturing an ultrafine carbon fiber of the present invention has several steps as follows. In the first step, a semiconductor film is formed over a surface having insulative. In the second step, a first treatment is performed so that a metal element or a silicide of the metal element is segregated on a crystal grain boundary of the semiconductor film after adding the metal element in the semiconductor film. In the third step, a second treatment is performed so that an ultrafine carbon fiber on the surface of the metal element or the silicide of the metal element is formed.Type: GrantFiled: July 28, 2004Date of Patent: April 10, 2007Assignee: Semiconductor Energy Laboratory, Co., Ltd.Inventor: Hideto Ohnuma
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Patent number: 7186160Abstract: An electron-emitting device in which the specific capacitance and the drive voltage are reduced, and which is capable of obtaining a finer electron beam by controlling the trajectory of emitted electrons. An electron-emitting portion of an electron-emitting member is positioned between the height of a gate and the height of an anode. When the distance between the gate and a cathode is d; the potential difference at driving the device is V1; the distance between the anode and the substrate is H; and the potential difference between the anode and the cathode is V2, then the electric field E1=V1/d during driving is configured to be within the range from 1 to 50 times E2=V2/H.Type: GrantFiled: March 15, 2004Date of Patent: March 6, 2007Assignee: Canon Kabushiki KaishaInventor: Takeo Tsukamoto
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Patent number: 7173366Abstract: Provided is a field emission display (FED) with a carbon nanotube emitter and a method of manufacturing the same. A gate stack that surrounds the CNT emitter has a mask layer that covers an emitter electrode adjacent to the CNT emitter, and a gate insulating film, a gate electrode, a focus gate insulating film (SiOx, X<2), and a focus gate electrode formed on the mask layer. The focus gate insulating film has a thickness 2 ?m or more, and preferably 3˜15 ?m and is preferably made using PECVD. A flow rate of silane and nitric acid for forming the focus gate insulating film and/or the gate insulating film are maintained at 50˜700 sccm and 700˜4,500 sccm, respectively. By doing so and by making the oxide thick, the oxide is less apt to crack and thus less apt to generate a leakage current.Type: GrantFiled: August 12, 2004Date of Patent: February 6, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Jun-Hee Choi, Andrei Zoulkarneev
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Patent number: 7169004Abstract: An apparatus (10) for, and method of, placing a plurality of spacers (12) between a parallel opposed anode and cathode (20) of an emissive display includes temporarily securing, by applying a vacuum for example, a first side of one of the anode or cathode to a base (14) having a plurality of electromagnets (16) positioned therein. The electromagnets (16) attract a first side of each of the plurality of spacers (12), thereby positioning each of the spacers (12) in a desired location on a second side of the one of the anode or cathode (20). The spacers (12) may be provided from a shuffling tray (40) having a plurality of openings (42), each opening (42) approximately aligned with one of the electromagnets (16) and shaped so as to present the first side to the electromagnet (16) to the one of the anode or cathode (20).Type: GrantFiled: April 27, 2005Date of Patent: January 30, 2007Inventors: Scott V. Johnson, Carl R. Hagen
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Patent number: 7161297Abstract: An electron emission thin-film with improved secondary electron emission characteristics compared with conventional ones, a plasma display panel including the electron emission thin-film, and their manufacturing methods. Using a vacuum deposition system, a protective layer that is an MgO thin-film is formed on a dielectric layer formed on a front glass substrate. At the time of deposition, angles that lines linking the central point of a target material for the protective layer respectively with the central point and both ends points of the front glass substrate form with the front glass substrate are exclusively in a range of 30 to 80 °. This enables at least some of MgO columnar crystals constituting the protective layer to have flat planes that are inclined with respect to the surface of the thinfilm.Type: GrantFiled: May 11, 2001Date of Patent: January 9, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Kotera, Yoshinao Ooe, Hiroki Kono, Hiroyosi Tanaka
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Patent number: 7160169Abstract: A method of forming carbon nanotube emitters and a method of manufacturing an FED using such carbon nanotube emitters includes: forming a carbon nanotube layer on a substrate on which a plurality of electrodes are formed, coating a photoresist on the carbon nanotube layer, patterning the photoresist such that the photoresist only remains above the electrodes, removing an exposed portion of the carbon nanotube layer by etching using the patterned photoresist as a etch mask, and removing the photoresist pattern and forming the carbon nanotube emitters on the electrodes.Type: GrantFiled: November 3, 2004Date of Patent: January 9, 2007Assignee: Samsung SDI Co., Ltd.Inventor: Shang-Hyeun Park
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Patent number: 7156715Abstract: A triode structure of a field emission display and fabrication method thereof. A plurality of cathode layers arranged in a matrix is formed overlying a dielectric layer. A plurality of emitting layers arranged in a matrix is formed overlying the cathode layers, respectively. A plurality of lengthwise-extending gate lines is formed on the dielectric layer, in which each of the gate layers is disposed between two adjacent columns of the cathode layers.Type: GrantFiled: April 19, 2005Date of Patent: January 2, 2007Assignee: Industrial Technology Research InstituteInventors: Chun-Tao Lee, Cheng-Chung Lee, Jyh-Rong Sheu, Yu-Yang Chang, Jia-Chong Ho, Yu-Wu Wang
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Patent number: 7147534Abstract: A patterned carbon nanotube process adopted for an electronic device is described. A negative photoresist layer is coated on a cathode substrate. A mask layer is formed with a carved cavity therein during a development process. A carbon nanotube spray is sprayed thereon to fill the carved cavity with a plurality of carbon nanotubes. The cathode substrate is sintered at a high temperature or in a vacuum to remove the mask layer and part of the carbon nanotubes adhered to the mask layer simultaneously, and to connect the rest of the carbon nanotubes firmly to the cathode conductive layer as an electron emitter layer with high resolution for increasing current density and uniformity of illumination of the electronic device.Type: GrantFiled: June 4, 2004Date of Patent: December 12, 2006Assignee: Teco Nanotech Co., Ltd.Inventors: Shih-Hsun Chen, Chun-Yen Hsiao, Shih-Chien Hsiao, Shie-Heng Lee, Kuei-Wen Cheng
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Patent number: 7147533Abstract: The present invention provides a method of producing an electron emitting device using a carbon fiber using a catalyst, capable of preferably growing carbon fibers at a low temperature without the need of a high temperature process for growing the carbon fibers or a high temperature alloy process on a substrate, and growing the carbon fibers by a density capable of applying an electric field necessary for the electron emission further effectively. Using alloy particles containing 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 as the catalyst, a dispersion of the alloy particles is applied on a carbon fiber producing subject surface for providing the alloy particles so as to grow the carbon fibers.Type: GrantFiled: September 15, 2003Date of Patent: December 12, 2006Assignee: Canon Kabushiki KaishaInventors: Shinichi Kawate, Takeo Tsukamoto
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Patent number: 7147529Abstract: The present invention provides an electron emission material that is excellent in electron emission characteristics, a method of manufacturing the same, as well as an electron emission element. The method is a method of manufacturing an electron emission material including a carbon material obtained by baking a polymer film. In the method, a polyamic acid solution is prepared in which at least one metallic compound selected from a metal oxide and a metal carbonate is dispersed; the polyamic acid solution thus prepared is formed into a film and then is imidized to form a polyimide film including the metallic compound; and then the polyimide film thus formed is baked to form the carbon material. The electron emission material is formed so that it includes a carbon material, a protrusion having a concavity in its surface is formed at the surface of the carbon material, and the protrusion includes a metallic element.Type: GrantFiled: April 11, 2005Date of Patent: December 12, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Taomoto, Masahiro Deguchi, Mitsuru Hashimoto, Toyokazu Ozaki, Motoshi Shibata
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Patent number: 7137859Abstract: A high-pressure discharge lamp is produced using tungsten wire that is wound as a double coiled winding around an electrode metal rod, leaving a tip end thereof, and the double coiled winding is machined into a melted tip end by a YAG laser beam, with the remaining double coiled winding used as a coil. The tip end of the metal rod is machined into a nipple on the distal end of the melted tip. The melted tip has a diameter D1 and a length L1, the nipple has a proximal end having a diameter D2 and a length L2, and the coil and the melted tip end (including the nipple) have a volume V1 and the melted tip end (including the nipple) has a volume V2, when the electrode assembly is machined to satisfy at least one of the conditions 0.15?D2/D1?0.3, 0.2?L2/L1?0.4, and 0.2?V2/V1?0.4.Type: GrantFiled: March 19, 2004Date of Patent: November 21, 2006Assignee: NEC CorporationInventor: Kazuhisa Nishida
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Patent number: 7065857Abstract: The method of manufacturing an electric part including a matrix-shaped nonconductive base member, and a carbon nanotube group that is sealed within the nonconductive base member and includes at least one of a carbon nanotube and a plurality carbon nanotubes that are electrically connected to each other. According to the method, substantially only an end portion of the carbon nanotube or at least carbon nanotube contained in the plurality of carbon nanotubes may be exposed from one surface of the nonconductive base member, and an electrode may be connected to a side surface of at least one carbon nanotube included in the carbon nanotube group.Type: GrantFiled: February 24, 2003Date of Patent: June 27, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Miho Watanabe, Hiroyuki Watanabe, Chikara Manabe, Masaaki Shimizu
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Patent number: 7037161Abstract: To enable formation of a pattern of constituent elements, arranged in correspondence with an arrangement of cells in a display region, as desired or required with a minimized quantity of the film material, a method of manufacturing a flat panel display is provided which includes printing on a substrate a surface treating material capable of partially enhancing the wettability of the substrate, in a predetermined pattern sufficient to encompass the eventually formed pattern of constituent elements of the flat panel display. Undercoats made of the surface treating material so printed is then patterned by irradiation of light. Thereafter, utilizing the undercoats, a film material is thereafter selectively deposited on the substrate to thereby complete the predetermined pattern of the constituent elements.Type: GrantFiled: May 5, 2004Date of Patent: May 2, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventor: Hiroshi Yamanaka
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Patent number: 7033238Abstract: A method is provided for forming and associating a lower section of a large-area field emission device (“FED”) that is sealed under a predetermined level of vacuum pressure with an upper section of a large-area FED. The upper section of the FED includes a faceplate. A first conductive layer is disposed on a surface of the faceplate. A matrix member is disposed on a surface of the first conductive layer, and cathodoluminescent material is disposed on the first conductive layer in areas not covered by the matrix member. The method includes disposing a plurality of spacers between the upper and lower sections of the FED to provide a predetermined separation between the upper and lower sections, with the spacers having cross-sectional shapes commensurate with stresses exerted on the spacers and/or heights commensurate with stresses exerted on the spacers. Resulting FED structures are disclosed.Type: GrantFiled: October 2, 2002Date of Patent: April 25, 2006Assignee: Micron Technology, Inc.Inventors: David A. Cathey, Jimmy J. Browning
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Patent number: 7025892Abstract: A method is provided for creating gated filament structures for a field emission display. A multi-layer structure is provided that includes a substrate, an insulating layer and a metal gate layer positioned on at least a portion of a top surface of the insulating layer. A plurality of patterned gates are also provided in order to define a plurality of gate apertures on the top surface of the insulating layer. A plurality of spacers are formed in the gate apertures at edges of the patterned gates on the top surface of the insulating layer. The spacers are used as masks for etching the insulating layer and forming a plurality of pores in the insulating layer. The pores are plated with a filament material that extends from the insulating pores, into the gate apertures, and creates a plurality of filaments. The spacers are then removed. The multi-layer structure can further include a conductivity layer on at least a portion of a top surface of the substrate.Type: GrantFiled: January 31, 1995Date of Patent: April 11, 2006Assignee: Candescent Technologies CorporationInventors: David L. Bergeron, John M. Macaulay, Roger W. Barton, Jeffrey D. Morse
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Patent number: 7004811Abstract: A device and method for forming a device including electron emitters. The method includes exposing a first face of a sheet of bundled fiber segments to a reactive liquid to allow first ends of the fiber segments to react with the reactive liquid to remove material therefrom. A coating material is deposited on the first face which has the material removed. The method also includes exposing a second face of the sheet of bundled fiber segments to a reactive liquid to allow second ends of the fiber segments to react with the reactive liquid to remove material therefrom to expose the coating material.Type: GrantFiled: February 24, 2004Date of Patent: February 28, 2006Inventor: Yin S. Tang
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Patent number: 6989630Abstract: A surface of a first grid electrode, which is located on a cathode side and is one of a plurality of electrodes for an electron gun used in an electrode gun assembly, is formed to be a rough surface having a higher degree of surface roughness than a surface of a second grid electrode located adjacent to the first grid electrode.Type: GrantFiled: August 12, 2003Date of Patent: January 24, 2006Assignee: Kabushiki Kaisha ToshibaInventor: Yoshihiro Kato
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Patent number: 6986693Abstract: A fabrication method produces a mechanically patterned layer of group III-nitride. The method includes providing a crystalline substrate and forming a first layer of a first group III-nitride on a planar surface of the substrate. The first layer has a single polarity and also has a pattern of holes or trenches that expose a portion of the substrate. The method includes then, epitaxially growing a second layer of a second group III-nitride over the first layer and the exposed portion of substrate. The first and second group III-nitrides have different alloy compositions. The method also includes subjecting the second layer to an aqueous solution of base to mechanically pattern the second layer.Type: GrantFiled: March 26, 2003Date of Patent: January 17, 2006Assignee: Lucent Technologies Inc.Inventors: Aref Chowdhury, Hock Min Ng, Richart Elliott Slusher
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Patent number: 6979244Abstract: A method of manufacturing an electronic device in which a substrate with a pair of electrodes is provided and a carbon nanotube is formed or arranged to electrically connect the electrodes.Type: GrantFiled: November 14, 2003Date of Patent: December 27, 2005Assignee: Canon Kabushiki KaishaInventors: Tohru Den, Tatsuya Iwasaki
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Patent number: 6962515Abstract: A method of removing, or otherwise rendering non-conductive, unwanted carbon nanotubes (132) from an electronic device (100) includes exposing at least a portion of the device to light emitted by one or more of light sources (202) that emit light. Those regions of the device that have wanted carbon nanotubes formed thereon can be selectively masked, by various methods, from the emitted light.Type: GrantFiled: March 28, 2003Date of Patent: November 8, 2005Assignee: Motorola, Inc.Inventors: Kenneth A. Dean, Bernard F. Coll, Scott V. Johnson
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Patent number: 6957994Abstract: An emission structure includes a resistor with at least one emitter tip thereover and at least one substantially vertically oriented conductive element positioned adjacent the resistor. The conductive element may contact the resistor. A method for fabricating the emission structure includes forming at least one conductive line, depositing at least one layer of semiconductive or conductive material over and laterally adjacent the at least one conductive line, and forming a hard mask in recessed areas of the surface of the uppermost material layer. The underlying material layer or layers are patterned through the hard mask, exposing substantially longitudinal center portions of the conductive lines. The remaining semiconductive or conductive material is patterned to form the emitter tip and resistor. At least the substantially central longitudinal portion of the conductive trace is removed to form the conductive element.Type: GrantFiled: September 2, 2003Date of Patent: October 25, 2005Assignee: Micron Technology, Inc.Inventor: Ammar Derraa
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Patent number: 6957993Abstract: 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 metallic light filaments. Accordingly, power consumption of the light filament is low at incandescent operating temperatures. A method for making a light filament made of carbon nanotubes includes the steps of: forming an array of carbon nanotubes (20); pulling out carbon nanotube yarn (204) from the carbon nanotube array; and winding the yarn between two leads (30) functioning as electrodes to form the light filament.Type: GrantFiled: December 31, 2002Date of Patent: October 25, 2005Assignees: Tsinghua University, Hon Hai Precision Ind. Co., Ltd.Inventors: KaiLi Jiang, ShouShan Fan, QunQing Li
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Patent number: 6953375Abstract: A field emission display includes a substrate and a plurality of emitters formed on columns on the substrate. The display also includes a porous dielectric layer formed on the substrate and the columns. The porous dielectric layer has an opening formed about each of the emitters and has a thickness substantially equal to a height of the emitters above the substrate. The porous dielectric layer may be formed by oxidation of porous polycrystalline silicon. The display also includes an extraction grid formed substantially in a plane defined by respective tips of the plurality of emitters and having an opening surrounding each tip of a respective one of the emitters. The display further includes a cathodoluminescent-coated faceplate having a planar surface formed parallel to and near the plane of tips of the plurality of emitters. The porous dielectric layer results in columns having less capacitance compared to prior art displays.Type: GrantFiled: March 29, 2004Date of Patent: October 11, 2005Assignee: Micron Technology, Inc.Inventors: Kie Y. Ahn, Leonard Forbes
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Patent number: 6920680Abstract: A method of forming a vacuum microelectronic device including steps of forming at least one electron emitter on a substrate, applying a first electric field to move a portion of the at least one electron emitter in a direction toward the first electric field, and maintaining the at least one electron emitter in the direction after removing the first electric field.Type: GrantFiled: August 28, 2001Date of Patent: July 26, 2005Assignee: Motorola, Inc.Inventors: Yi Wei, Kenneth Andrew Dean, Chenggang Xie