Discharge Control Electrode Patents (Class 313/308)
  • Patent number: 10490745
    Abstract: Methods of forming planar RRAM and vertical RRAM with tip electrodes and the resulting devices are provided. Embodiments include forming a first metal oxide layer on a first dielectric layer; forming and patterning a mask layer over the first metal oxide layer; etching the first metal oxide through the mask layer to form openings for a first and second metal electrodes; removing the mask layer; forming the first and second metal electrodes in the openings; and forming a second metal oxide layer over the first and second metal electrodes, wherein the first and second metal electrodes are v-shaped in top view with tips of the first and second metal electrodes facing each other and a portion of the second metal oxide layer being formed between the tips of the first and second electrodes.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: November 26, 2019
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Jianxun Sun, Juan Boon Tan, Kwang Sing Yew, Wanbing Yi, Curtis Chun-I Hsieh, Tupei Chen
  • Patent number: 10453982
    Abstract: A solar battery module is provided that includes plural solar battery cells, plural interconnectors each having a shock absorber, a sealing layer, a back face layer, and a front face layer having optical transparency. The plural solar battery cells each include an electrode on a peripheral edge portion at a back face that does not receive sunlight. The plural interconnectors extend along the peripheral edge portions, and connect the electrodes of the plural solar battery cells to each other. The sealing layer seals each of the solar battery cells and each of the interconnectors. The shock absorber is disposed in a region between corner portions of adjacent or diagonally opposing solar battery cells, and permits movement of the solar battery cells accompanying expansion or contraction of at least one out of the back face layer or the front face layer.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: October 22, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yuki Kudo, Shoichi Iwamoto, Hiroyuki Ohba, Hirotaka Inaba
  • Patent number: 10415945
    Abstract: An assembly can include solid-state overvoltage firing switch operable to control an explosive device. The solid-state overvoltage firing switch can include a substrate layer. The solid-state overvoltage firing switch can also include a conductive anode and a conductive cathode positioned on the substrate layer. A gap can physically separate the conductive anode from the conductive cathode. The conductive anode can be operable to receive a voltage from a power source. The solid-state overvoltage firing switch can further include an insulator layer adjacent to the conductive anode and the conductive cathode. At least part of the insulator layer can fill the gap. The insulator layer can cover a first portion of the conductive anode and a second portion of the conductive cathode.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: September 17, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas Earl Burky, Thomas Jeffrey Wuensche
  • Patent number: 9852871
    Abstract: The disclosure relates to a detecting system including a terahertz wave source, a detector and a controlling computer. The terahertz wave source includes a terahertz reflection klystron including an electron emission unit, a resonance unit, an output unit. The electron emission unit is configured to emit electrons. The resonance unit includes a resonant cavity communicated with the electron emission unit so that the electron emission unit emit electrons into the resonant cavity. The resonant cavity of the electron emission unit opposite the cavity wall has an output aperture coupled. The output unit is communicated with the resonance unit by the output aperture coupled. The resonance unit generate terahertz wave transmit to the output unit by the output aperture coupled.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: December 26, 2017
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Peng Liu, Pi-Jin Chen, Zong-Qian Li, You-Hua Lei, Chun-Hai Zhang, Duan-Liang Zhou, Shou-Shan Fan
  • Patent number: 9805900
    Abstract: In an embodiment, a method includes forming a first diamond layer on a substrate and inducing a layer of graphene from the first diamond layer by heating the substrate and the first diamond layer. The method includes forming a second diamond layer on top of the layer of graphene and applying a mask to the second diamond layer. The mask includes a shape of a cathode, an anode, and one or more grids. The method further includes forming a two-dimensional cold cathode, a two-dimensional anode, and one or more two-dimensional grids by reactive-ion electron-beam etching. Each of the two-dimensional cold cathode, the two-dimensional anode, and the one or more two-dimensional grids includes a portion of the first diamond layer, the graphene layer, and the second diamond layer such that the graphene layer is positioned between the first diamond layer and the second diamond layer.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: October 31, 2017
    Assignee: Lockheed Martin Corporation
    Inventor: David Glen Findley
  • Patent number: 9436866
    Abstract: A flat panel imaging system for imaging cells provided on a cell medium is disclosed. The system includes a housing having a base portion and a lid that collectively form a closed environment to exclude external sources of light, and a flat panel detector encased in the base portion and having an array of pixels each including a photodiode and transistor. The system also includes a first light source that illuminates cells on the cell medium to excite at least a portion of the cells and cause those cells to generate photons that are captured by the array of pixels and a second light source to illuminate cells on the cell medium with a light different from the light from the first light source and that provides for a capturing of photons representative of photons transmitted through the cells on the cell medium.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: September 6, 2016
    Assignee: General Electric Company
    Inventors: Aaron Judy Couture, Faisal Ahmed Syud, John Brian Hewgley, Yu Zhao
  • Patent number: 9238351
    Abstract: The present invention provides a composite film having a linearly-scratched, thin metal film and a plastic film, which has good absorbability to electromagnetic waves in various frequencies, as well as reduced anisotropy in electromagnetic wave absorbability, suitable for electromagnetic wave absorbers, and its production apparatus. The composite film having a linearly-scratched, thin metal film and a plastic film according to the present invention comprises a plastic film, and a single- or multi-layer, thin metal film formed on at least one surface of the plastic film, the thin metal film being provided with large numbers of substantially parallel, intermittent, linear scratches with irregular widths and intervals in plural directions.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: January 19, 2016
    Inventors: Seiji Kagawa, Yoichiro Kagawa
  • Publication number: 20150022076
    Abstract: One or more embodiments of the invention concern a device comprising: a cathode that lies on a cathode plane and includes, in an active region one or more cathode straight-finger-shaped terminals with a main extension direction parallel to a first reference direction; for each cathode terminal, one or more electron emitters formed on, and in ohmic contact with, said cathode terminal; and a gate electrode that lies on a gate plane parallel to, and spaced apart from, said cathode plane, does not overlap the cathode and includes, in the active region, two or more gate straight-finger-shaped terminals with a main extension direction parallel to the first reference direction; wherein the gate terminals are interlaced with said cathode terminal(s).
    Type: Application
    Filed: November 26, 2012
    Publication date: January 22, 2015
    Inventors: Giacomo Ulisse, Francesca Brunetti, Aldo Di Carlo, Ferdinando Ricci, Filippo Gemma, Anna Maria Fiorello, Massimiliano Dispenza, Roberta Buttiglione
  • Patent number: 8450920
    Abstract: The present disclosure provides a field emission electronic device. The field emission electronic device includes an insulating substrate, a first electrical conductor located on surface of the insulating substrate, a number of electron emitters connected to the first electrical conductor, a second electrical conductor spaced apart from and insulated from the first electrical conductor. Each of the number of electron emitters includes at least one electron emitter. Each of the electron emitters includes a carbon nanotube pipe. The carbon nanotube pipe includes a first end, a second end and a main body connecting the first end and the second end. The first end of the carbon nanotube pipe is electrically connected to one of the plurality of row electrodes. The second end of the carbon nanotube pipe has a number of carbon nanotube peaks.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: May 28, 2013
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Peng Liu, Hai-Yan Hao, Shou-Shan Fan
  • Patent number: 8253314
    Abstract: An ion source using a field emission device is provided. The field emission device includes an insulative substrate, an electron pulling electrode, a secondary electron emission layer, a first dielectric layer, a cathode electrode, and an electron emission layer. The electron pulling electrode is located on a surface of the insulative substrate. The secondary electron emission layer is located on a surface of the electron pulling electrode. The cathode electrode is located apart from the electron pulling electrode by the first dielectric layer. The cathode electrode has a surface oriented to the electron pulling electrode and defines a first opening as an electron output portion. The electron emission layer is located on the surface of the cathode electrode and oriented to the electron pulling electrode.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: August 28, 2012
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Peng Liu, Duan-Liang Zhou, Pi-Jin Chen, Zhao-Fu Hu, Cai-Lin Guo, Bing-Chu Du, Shou-Shan Fan
  • Publication number: 20120012746
    Abstract: An ion source may include first, second, and third electrodes. The first electrode may be a repeller having a V-shaped groove. The second electrode may be an electron emitter filament disposed adjacent the base of the V-shaped groove. The third electrode may be an anode that defines an enclosed volume with an aperture formed therein adjacent the electron emitter filament. A potential of the first electrode may be less than a potential of the second electrode, and the potential of the second electrode may be less than a potential of the third electrode. A fourth electrode that is disposed between the electron emitter filament and the anode may be used to produce a more collimated electron beam.
    Type: Application
    Filed: July 19, 2010
    Publication date: January 19, 2012
    Inventors: FEDERICO A. HERRERO, Patrick A. Roman
  • Patent number: 8018169
    Abstract: Disclosed is a field emission device. The field emission device includes: an anode substrate including an anode electrode formed on a surface thereof and a fluorescent layer formed on the anode electrode; a cathode substrate disposed opposite to and spaced apart from the anode substrate, and including at least one cathode electrode formed toward the anode substrate and a field emitter formed on each cathode electrode; and a gate substrate having one surface in contact with the cathode substrate, wherein the gate substrate include gate insulators surrounding the field emitters and having a plurality of openings exposing the field emitters, and a plurality of gate electrodes formed on the gate insulators around the openings and electrically isolated from one another.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: September 13, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jin Woo Jeong, Yoon Ho Song, Dae Jun Kim
  • Patent number: 8013510
    Abstract: An electron emission device includes a cathode device and a gate electrode. The gate electrode is separated and insulted from the cathode device. The gate electrode includes a carbon nanotube layer having a plurality of spaces. A display device includes a cathode device, an anode device spaced from the cathode electrode and a gate electrode. The gate electrode is disposed between the cathode device and the anode device. The cathode device, the anode device and the gate electrode are separated and insulted from each other. The gate electrode comprises a carbon nanotube layer having a plurality of spaces.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: September 6, 2011
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Lin Xiao, Liang Liu, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 7982381
    Abstract: An electron source including: a plurality of electron-emitting devices connected to a matrix wiring of scan lines and modulation lines on a substrate, wherein each of the electron-emitting devices includes a cathode electrode connected to the scan line, a gate electrode connected to the modulation line and a plurality of electron-emitting members, the cathode electrode is configured in a first comb-like structure for applying an electric potential of the cathode to the plurality of electron-emitting members, the gate electrode is configured in a second comb-like structure for applying an electric potential of the gate to the plurality of electron-emitting members, and each of the first and second comb-like structures is provided with a plurality of comb-teeth, and a connecting electrode electrically connected to the plurality of teeth in at least one of the first and second comb-like structures.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: July 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Nobumasa Suzuki
  • Patent number: 7956545
    Abstract: The field emission device includes: a front substrate and a rear substrate which are disposed at a certain distance and opposite to each other; at least one or more cathode electrodes formed on the rear substrate; at least one or more gate electrodes formed to be distant from the cathode electrodes and to be insulated with the rear substrate; emitters formed on the upper surfaces of the cathode electrodes; an anode electrode formed on the front substrate toward the rear substrate side; a fluorescent layer formed on the anode electrode; a first voltage application circuit for applying an AC voltage to the anode electrode; and a second voltage application circuit for applying an AC voltage to the gate electrode, wherein the AC voltages being applied to the anode electrode and the gate electrode are synchronized.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 7, 2011
    Assignee: Kumho Electric, Inc.
    Inventors: Kwang Bok Kim, Dong Wook Yang
  • Publication number: 20100264805
    Abstract: Under-gate field emission triode devices, and cathode assemblies for use therein, contain a charge dissipation layer. The charge dissipation layer may be located under or over the cathode electrode and/or electron field emitter.
    Type: Application
    Filed: October 3, 2008
    Publication date: October 21, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Adam Fennimore, Lap-Tak Andrew Cheng
  • Patent number: 7741768
    Abstract: A field emission device (5) includes cathode electrodes (51), emitters (52) formed on the cathode electrodes, grid electrodes (54) formed over the cathode electrodes at a distance apart from the emitters, and isolated films (55) formed on surfaces of the grid electrodes neighboring the emitters. Preferably, the isolated film has a thickness ranging from 0.1 to 1 microns. The isolated film may be a film made of one or more insulating materials, such as SiO2 and Si3N4. Alternatively, the one or more insulating materials can be selected from a material having a high secondary electron emission coefficient, such as MgO, Al2O3 and ZnO. Additionally, the isolated film can be further formed on a second surface of the grid electrode distal from the emitter.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: June 22, 2010
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Liang Liu, Shou-Shan Fan
  • Publication number: 20100026160
    Abstract: An electron source showing little surplus current even at a time of high angular intensity operation is provided. An electron source comprising an electron emitting portion, a suppressor electrode and an extractor electrode, wherein the electron emitting portion is present at a leading edge of an end of a single crystal rod having a shape comprising a first truncated cone portion or a cone portion, and a second truncated cone portion continuing therefrom. It is preferably the electron source, wherein the single crystal rod has an oxide of a metal element selected from the group consisting of Ca, Sr, Ba, Sc, Y, La, Ti, Zr, Hf and lanthanoide elements as a diffusion source, and the single crystal rod is made of tungsten or molybden of <100> orientation.
    Type: Application
    Filed: September 26, 2007
    Publication date: February 4, 2010
    Applicant: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshinori Terui, Fumihiro Nakahara, Seiichi Sakawa
  • Patent number: 7629737
    Abstract: A fluorescent display device includes a front glass at least part of which is translucent, a substrate, a cathode, an electron-emitting layer, an electron extracting electrode, a phosphor film and an anode, and a conductive layer. The substrate is formed of an insulating member arranged to oppose the front glass. The front glass and the substrate constitute part of a vacuum envelope. The cathode is disposed on the substrate. The electron-emitting layer includes a carbon nanotube and is formed on a surface of the cathode. The electron extracting electrode is arranged between the substrate and the front glass to be spaced apart from the cathode. The phosphor layer and the anode stack on a surface of the front glass which opposes the substrate. The conductive layer is formed between the cathode and the substrate.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: December 8, 2009
    Assignee: Noritake Co., Ltd.
    Inventors: Junko Yotani, Sashiro Uemura
  • Publication number: 20090153010
    Abstract: A multi-directional dispenser cathode has a cathode body that supports a plurality of electron emitters which spanning open portions of the cathode body. Each electron emitter has an inward facing surface and an outward facing surface wherein the inward facing surfaces and an interior wall of the body define an interior volume that contains a heater. To selectively accelerate emitted electrons, an electrically distinct biasing electrode is in spaced relationship to the outward facing surface of each electron emitter and coupled to a biasing power supply effective to provide an intermittent positive voltage potential to the biasing electrode. The distinct biasing electrodes are provided with a positive voltage potential at different times thereby causing an intermittent burst of electrons. Among the applications for intermittent bursts of accelerated electrons are to generate radiation from a particle accelerator.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 18, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Luke T. Perkins
  • Patent number: 7545090
    Abstract: A novel field emission display (FED) and a novel method for making the same. The FED includes a substrate, a cathode electrode and a focus electrode formed on the same level with each other on the substrate, an insulation layer formed on the cathode electrode and the focus electrode such that the cathode electrode and the focus electrode are partially exposed through the insulation layer, a field emitter formed at the cathode electrode exposed by the insulation layer, and a gate electrode formed on the insulation layer. The field emitter being formed on the same layer and of the same material and at the same time as the cathode electrode.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: June 9, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: In-Taek Han, Tae-Sik Oh
  • Patent number: 7545091
    Abstract: An electron emission device includes first electrodes arranged on a substrate in a direction of the substrate, and an insulating layer arranged on an entire surface of the substrate and covering the first electrodes. Second electrodes are arranged on the insulating layer and are perpendicular to the first electrodes. Electron emission regions are connected to one of the first and the second electrodes. The lateral edges of the first electrodes and the lateral edges of the second electrodes respectively cross each other.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: June 9, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Byong-Gon Lee, Sang-Jo Lee, Sang-Ho Jeon, Sang-Hyuck Ahn, Su-Bong Hong, Chun-Gyoo Lee
  • Patent number: 7504768
    Abstract: A Field Emission Display (FED) includes: a first substrate; a cathode arranged on the first substrate: a conductive layer arranged on the cathode, the conductive layer including a first opening; an insulating layer arranged on the first substrate to cover an upper surface and side surfaces of the conductive layer, the insulating layer including a second opening arranged in the first opening to expose a portion of the cathode; a gate electrode arranged on the insulating layer, the gate electrode including a third opening connected to the second opening; a plurality of emitters arranged on the portion of the cathode exposed in the second opening and along both edges of the second opening, the plurality of emitters being spaced apart from each other; and a second substrate facing the first substrate and spaced apart from the first substrate, the second substrate including an anode and a fluorescent layer formed on a surface thereof.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: March 17, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Tae-Sik Oh
  • Patent number: 7498741
    Abstract: The present invention relates to a photomultiplier having a structure for performing a high gain and achieving a higher productivity in a state keeping or improving an excellent high-speed response. In the photomultiplier, an electron-multiplying unit accommodated in a sealed container has a structure that enables an integrated assembly of a focusing electrode, an accelerating electrode, a dynode unit, and an anode. Specifically, the accelerating electrode composes a lower electrode and an upper electrode fixed each other by welding at a plurality of spots. The lower electrode is held at a pair of insulating support members in a state for the pair of insulating support members to grasp unitedly it together with the dynode unit and anode. Additionally, the upper electrode has one or more slit grooves for pinching a part of the pair of insulating support members.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: March 3, 2009
    Assignee: Hamamatsu Photonics K.K.
    Inventor: Toshikazu Fujita
  • Patent number: 7477011
    Abstract: 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: Grant
    Filed: November 25, 2005
    Date of Patent: January 13, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sang-Ho Jeon, Byong-Gon Lee, Sang-Hyuck Ahn, Su-Bong Hong
  • Patent number: 7436111
    Abstract: An electron emission display device is capable of focusing electrons emitted from an electron emission region by using small gate holes formed on a thick insulating layer. The electron emission device includes a substrate, a cathode electrode formed on the substrate, a insulating layer formed on the cathode electrode, a gate electrode formed on the insulating layer, and the electron emission region formed on the cathode electrode. In the electron emission device, the insulating layer is provided with a first insulating layer and at least one second insulating layer formed partly on the first insulating layer, and the gate electrode has a stepped portion along a surface of the insulating layer and an inclined portion to connect upper and lower end portions of the stepped portion.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: October 14, 2008
    Assignee: Samsung SDI Co. Ltd.
    Inventor: Seong-Yeon Hwang
  • Patent number: 7397179
    Abstract: A flat panel display reduces the line resistance of a driving power supply line and prevents a voltage drop in the driving power supply line so as to obtain uniform resolution and luminance. The flat panel display includes a substrate, a display region formed on the substrate, the display region having a self-luminescent element and VDD lines that supply a driving potential power and/or a source current to the self-luminescent element. Further, a covering member for sealing the display region at least, the covering member being adhered to the substrate to face the substrate and a terminal region formed on one or more edges of the substrate, the terminal region having one or more driving power terminals are provided. In addition, a driving power supply line that connects the driving power terminals to the VDD lines of the display region and a bus conductive unit that is electrically connected to the driving power supply line are provided.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: July 8, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Kum-Nam Kim
  • Publication number: 20070200476
    Abstract: The present invention provides a display device allowing the quality and reliability to be improved by preventing the occurrence of vacuum leak attributable to dislocation which may be caused by preliminary baking and panel sealing. A display device in which the end surfaces of a support body 13 are hermetically bonded to a front substrate 2 and a rear substrate 1 by sealing members 4. In the display device, the support body 13 is formed by bonding together a plurality of support body members 13X1, 13X2, 13Y1 and 13Y2, and adjacent support body members are bonded by using a first bonding member 141 for bonding a central area of each bonding surface and a second bonding member 142 for bonding a marginal area around the central area. The softening temperature of the first bonding member is set higher than the softening temperature of the second bonding member.
    Type: Application
    Filed: February 27, 2007
    Publication date: August 30, 2007
    Inventors: Yuuichi Kijima, Noriyuki Oroku, Shigemi Hirasawa, Hiroyuki Tachihara, Ikuo Yamaba
  • Patent number: 7078855
    Abstract: A light device includes an electron supply defining an emitter surface. A dielectric tunneling layer is disposed between the electron supply and a cathode layer. The cathode layer has at least partial photon transparency that is substantially uniform across the emitter surface.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: July 18, 2006
    Inventors: Zhizhang Chen, Sriram Ramamoorthi, Terry E McMahon, Timothy F. Myers
  • Patent number: 7005782
    Abstract: A charged particle apparatus, with multiple electrically conducting semispheric grid electrodes, the grid electrodes mounted in a dielectric mounting ring, with hidden areas or regions to maintain electrical isolation between the grid electrodes as sputter deposits form on the grid electrodes and mounting ring. The grid electrodes are mounted to the mounting ring with slots and fastening pins that allow sliding thermal expansion and contraction between the grid electrodes and mounting ring while substantially maintaining alignment of grid openings and spacing between the grid electrodes. Asymmetric fastening pins facilitate the sliding thermal expansion while restraining the grid electrodes. Electrical contactors supply and maintain electrical potentials of the grid electrodes with spring loaded sliding contacts, without substantially affecting the thermal characteristics of the grid electrodes.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: February 28, 2006
    Assignee: VEECO Instruments, Inc.
    Inventors: Viktor Kanarov, Alan V. Hayes, Rustam Yevtukhov, Daniel Yakovlevitch
  • Patent number: 6903504
    Abstract: A covering layer for insulating between column wirings and device electrodes is formed in a region including each cross point of the column wirings and row wirings and under the column wirings. Thus, when an electron source plate in which a large number of electron-emitting devices are wired in passive matrix is formed, a defect resulting from an interaction between the device electrodes and the column wirings at the time of wiring formation is reduced to improve insulation reliability. Therefore, a high quality image is obtained by a large size and higher density pixel arrangement in an image-forming apparatus using the electron source plate.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: June 7, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuyuki Watanabe, Kazuya Ishiwata, Shinsaku Kubo
  • Patent number: 6882100
    Abstract: A light device includes an electron supply defining an emitter surface. A dielectric tunneling layer is disposed between the electron supply and a cathode layer. The cathode layer has at least partial photon transparency that is substantially uniform across the emitter surface.
    Type: Grant
    Filed: January 6, 2003
    Date of Patent: April 19, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Sriram Ramamoorthi, Terry E McMahon, Timothy F. Myers
  • Patent number: 6825596
    Abstract: Electron emitters and a method of fabricating emitters which have a concentration gradient of impurities, such that the highest concentration of impurities is at the apex of the emitters, and decreases toward the base of the emitters. The method comprises the steps of doping, patterning, etching, and oxidizing the substrate, thereby forming the emitters having impurity gradients.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: November 30, 2004
    Assignee: Micron Technology, Inc.
    Inventor: David A. Cathey
  • Patent number: 6800995
    Abstract: An image display device is provided which is capable of increasing a dielectric voltage while reducing a depth and a frame region. The image display device is provided with a rear plate having surface conduction electron-emitting devices that are electron beam source and a faceplate having an anode electrode and a first potential regulating member on an identical surface. The anode electrode and the first potential regulating member are arranged separately from each other. The anode electrode is regulated to an electron accelerating potential. The first potential regulating member is regulated to a potential lower than that of the anode electrode. A second potential regulating member regulated to a potential lower than that of the anode electrode is provided at least in the vicinity of an end of the first potential regulating member on the anode electrode side on a surface on the opposite side of a surface having the first potential regulating member of the faceplate.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: October 5, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomoya Ohnishi
  • Publication number: 20040135519
    Abstract: An electronic device of the invention includes a tip emitter formed in a well that is defined in a substrate. An extractor disposed about the well extracts emissions from the tip emitter. A wide lens focuses the emissions through its opening. The opening is sufficiently large and spaced far enough away to encompass the majority of a divergence angle of the emissions. The emissions are focused into a spot.
    Type: Application
    Filed: January 13, 2003
    Publication date: July 15, 2004
    Inventors: Paul Benning, Huei-Pei Kuo, William R. Knight, Paul H. McClelland
  • Patent number: 6762542
    Abstract: An electron source includes a substrate, a coating layer provided on the substrate, plural electron emission elements disposed on the coating layer, and a metal for connecting the plural electron emission elements. The electron emission element includes a conductive film including the electron emission part disposed on the coating layer, with the conductive film being connected to a wiring line with a conductive member for blocking the metals contained in the wiring lines from being transferred to the conductive film.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: July 13, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kouki Nukanobu, Takashi Enomoto, Keishi Danjo
  • Patent number: 6756730
    Abstract: A field emission display (FED) consists of a cathode plate including a plurality of emitter lines formed on a cathode substrate, a gate frame positioned over the cathode plate, the gate frame including a plurality of gate wires, and an anode plate including a plurality of phosphor lines positioned over the gate frame. The plurality of phosphor lines are aligned with the plurality of emitter lines. In some variations, the FED includes a plurality of linear isolation barriers separating one or more of the plurality of emitter lines. In some variations, the linear isolation barriers are in the form of ribs or trenches.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: June 29, 2004
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Benjamin Edward Russ, Jack Barger
  • Patent number: 6741016
    Abstract: An electron lens is used for focusing electrons from a cathode to an anode. The lens includes a first conductive layer with a first opening at a first distance from the cathode. The first conductive layer is held at a first voltage. The lens also includes a second conductive layer with a second opening at a second distance from the first conductive layer and a third distance from the anode. The second conductive layer is held at a second voltage substantially equal to the voltage of the anode. The first and second openings are chosen based on the first voltage, the second voltage, the first distance, the second distance and the third distance. The opening focuses the electrons emitted from the cathode onto the anode to a spot size preferably less than 40 nanometers. The force created between the cathode and anode is minimized by the structure of the lens.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: May 25, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Paul J. Benning, William R Knight, Michael J. Regan
  • Publication number: 20040056578
    Abstract: This invention provides a multielectron gun which generates a plurality of electron beams having uniform characteristics. A multielectron gun (2) is formed of a plurality of electron guns (2a-2c). The electron gun (2a) has, in addition to an electron source (21a), Wehnelt electrode (22a), and anode electrode (23), a shield electrode (24) between the Wehnelt electrode (22a) and anode electrode (23). The shield electrode reduces field interference among the electron guns.
    Type: Application
    Filed: July 14, 2003
    Publication date: March 25, 2004
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masahiko Okunuki, Hiroya Ohta, Norio Saito, Masaki Takakuwa, Sayaka Tanimoto, Takeshi Haraguchi
  • Patent number: 6686678
    Abstract: A flat panel display having a mesh grid assembly which includes upper and lower spacers integral therein. The flat panel display includes a faceplate and a backplate provided opposing one another with a predetermined gap therebetween to define an exterior of the display. An illuminating assembly is provided in the display, the illuminating assembly realizing predetermined images. A mesh grid is provided between the backplate and the faceplate. A lower spacer is connected to a surface of the mesh grid opposing the backplate to be supported by the backplate. Upper spacers are connected to a surface of the mesh grid opposing the faceplate to be supported by the faceplate. The mesh grid, the lower spacer, and the upper spacers thereby integrally forming a single structural assembly.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: February 3, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Bong-Kyung Suk, Cheol-Hyeon Chang, Dong-Su Chang
  • Patent number: 6635978
    Abstract: A grid for an electron tube with an axial beam which includes an apertured part through which the electrons of the beam are intended to pass. The grid is in the form of a bell and is made of a single material. The apertured part is located at the top of the bell but is placed in the bottom of a hollow so that the electrons passing through the grid around its periphery are focused onto the axis. Such a grid may find particular application to IOT-type tubes.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: October 21, 2003
    Assignee: Thomson Tubes Electroniques
    Inventor: Guy Clerc
  • Patent number: 6538367
    Abstract: This invention is predicated on applicants' discovery that a highly oriented nanoconductor structure alone does not guarantee efficient field emission. To the contrary, the conventional densely populated, highly oriented structures actually yield relatively poor field emission characteristics. Applicants have determined that the individual nanoconductors in conventional assemblies are so closely spaced that they shield each other from effective field concentration at the ends, thus diminishing the driving force for efficient electron emission. In accordance with the invention, an improved field emitting nanoconductors assembly (a “low density nanoconductor assembly”) comprises an array of nanoconductors which are highly aligned but spaced from each other no closer than 10% of the height of the nanoconductors. In this way, the field strength at the ends will be at least 50% of the maximal field concentration possible.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: March 25, 2003
    Assignee: Agere Systems Inc.
    Inventors: Kyung Moon Choi, Sungho Jin, Gregory Peter Kochanski, Wei Zhu
  • Patent number: 6522061
    Abstract: A field emission device with a micro-channel gain element included a plurality of field emission or “cold” cathodes (102) formed into an array. The cold cathodes are typically modulated by a grid (108) having a driving voltage. A microchannel gain element (114) is secondary electron emissive material within each of the channels. The channels correspond number and location to the cathode and enable multiplication of electron emitted by the cathodes. Multiplication of the electrons enables the cathodes to be driven at a lower current of emitted electrons than normally applied, absent the microchannel, to obtain the same resulting beam. The beam existing each of the micro-channels is directed to an anode (130), which can include a phosphor (128) for use in a flat panel display.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: February 18, 2003
    Inventor: Harry F. Lockwood
  • Patent number: 6518590
    Abstract: Field emission transistors where either N type or P type devices are made with an insulated gate isolated from both the emitter and the collector. Such devices have input voltage levels that match the output levels, and as such are fully cascadable and integrable. Emitter and collector functions are combined in combinations to make complimentary pairs, NAND gates and NOR gates.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: February 11, 2003
    Assignee: H & K Labs
    Inventors: Gaylen R. Hinton, David Summers
  • Patent number: 6501216
    Abstract: A display includes a substrate and an emitter formed on the substrate. A first dielectric layer is formed on the substrate to have a thickness slightly less than a height of the emitter above the planar surface and includes an opening formed about the emitter. The display also includes a conductive extraction grid formed on the first dielectric layer. The extraction grid includes an opening surrounding the emitter. The display further includes a second dielectric layer formed on the extraction grid and a focusing electrode formed on the second dielectric layer. The focusing electrode is electrically coupled to the emitter through an impedance element. The focusing electrode includes an opening formed above the apex. The focusing electrode provides enhanced focusing performance together with reduced circuit complexity, resulting in a superior display.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: December 31, 2002
    Assignee: Micron Technology, Inc.
    Inventor: Zhongyi Xia
  • Patent number: 6492647
    Abstract: The specification describes a method and apparatus for electron beam lithography wherein a Wehnelt electron gun is modified to improve the uniformity of the electron beam. The bias on the Wehnelt aperture is reversed from the conventional bias so that it is biased positively with respect to the cathode. The Wehnelt opening is tapered with a disk emitter inserted into the taper. The result of these modifications is an electron beam output with low brightness which is highly uniform over the beam cross section.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: December 10, 2002
    Assignee: Agere Systems, Inc.
    Inventors: Victor Katsap, James Alexander Liddle, Warren Kazmir Waskiewicz
  • Patent number: 6476548
    Abstract: A display includes a substrate and an emitter formed on the substrate. A first dielectric layer is formed on the substrate to have a thickness slightly less than a height of the emitter above the planar surface and includes an opening formed about the emitter. The display also includes a conductive extraction grid formed on the first dielectric layer. The extraction grid includes an opening surrounding the emitter. The display further includes a second dielectric layer formed on the extraction grid and a focusing electrode formed on the second dielectric layer. The focusing electrode is electrically coupled to the emitter through an impedance element. The focusing electrode includes an opening formed above the apex. The focusing electrode provides enhanced focusing performance together with reduced circuit complexity, resulting in a superior display.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: November 5, 2002
    Assignee: Micron Technology, Inc.
    Inventor: Zhongyi Xia
  • Patent number: 6441543
    Abstract: A plurality of field emission device cathodes each generate emission of electrons, which are then controlled and focused using various electrodes to produce an electron beam. Horizontal and vertical deflection techniques, similar to those used within a cathode ray tube, operate to scan the individual electron beams onto portions of a phosphor screen in order to generate images. The use of the plurality of field emission cathodes provides for a flatter screen depth than possible with a typical cathode ray tube.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: August 27, 2002
    Assignee: SI Diamond Technology, Inc.
    Inventors: Zvi Yaniv, Ronald Charles Robinder
  • Patent number: 6441550
    Abstract: An electron field emission device is provided by placing a substrate in a reactor, heating the substrate and supplying a mixture of hydrogen and a carbon-containing gas to the reactor while supplying energy to the mixture of gases near the substrate for a time to grow a carbon-based body to a thickness greater than 20 micrometers, subsequently removing the substrate and then applying an electrical contact to one surface of the body. The device is free-standing and can be used as a cold cathode in a variety of electronic devices such as cathode ray tubes, amplifiers and traveling wave tubes. The surface of the substrate may be patterned before growth of the carbon-based body to produce a patterned surface on the field emission device after the substrate is removed.
    Type: Grant
    Filed: October 12, 1998
    Date of Patent: August 27, 2002
    Assignee: Extreme Devices Inc.
    Inventors: Donald E. Patterson, Keith D. Jamison
  • Patent number: 6420726
    Abstract: A triode field emission device using a field emission material and a driving method thereof are provided. In this device, gate electrodes serving to take electrons out of a field emission material on cathodes are installed on a substrate below the cathodes, so that the manufacture of the device is easy. Also, electrons emitted from the field emission material are controlled by controlling gate voltage.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: July 16, 2002
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Yong-soo Choi, Jun-hee Choi, Nae-sung Lee, Jong-min Kim