Electron Emitter (e.g., Spindt Emitter Tip Coated With Nanoparticles, Etc.) Patents (Class 977/939)
  • Publication number: 20150146865
    Abstract: Provided are a field emission device and a method of manufacturing the same. The field emission device includes an anode electrode and a cathode electrode which are opposite to each other, a counter layer provided on the anode electrode, and a field emitter provided on the cathode electrode and facing the counter layer. Herein, the field emitter includes a carbon nanotube emitting cold electrons and a photoelectric material emitting photo electrons.
    Type: Application
    Filed: July 23, 2014
    Publication date: May 28, 2015
    Inventors: Jae-woo KIM, Yoon-Ho SONG, Jin Woo JEONG, Jun Tae KANG, Sungyoul CHOI, Jeong Yong CHOI
  • Publication number: 20150076988
    Abstract: A field emission device comprises one or more emitter elements, each having a high aspect ratio structure with a nanometer scaled cross section; and one or more segmented electrodes, each surrounding one of the one or more emitters. Each of the one or more segmented electrodes has multiple electrode plates. This abstract is provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Application
    Filed: September 12, 2014
    Publication date: March 19, 2015
    Inventors: Thomas Plettner, Mehran Nasser-Ghodsi
  • Publication number: 20150061487
    Abstract: A cold cathode field emission electron source capable of emission at levels comparable to thermal sources is described. Emission in excess of 6 A/cm2 at 7.5 V/?m is demonstrated in a macroscopic emitter array. The emitter is comprised of a monolithic and rigid porous semiconductor nanostructure with uniformly distributed emission sites, and is fabricated through a room temperature process which allows for control of emission properties. These electron sources can be used in a wide range of applications, including microwave electronics and x-ray imaging for medicine and security.
    Type: Application
    Filed: October 20, 2014
    Publication date: March 5, 2015
    Inventors: Fred Sharifi, MYUNG-GYU KANG, HENRI LEZEC
  • Publication number: 20150036797
    Abstract: An intraoral radiation device comprises a biocompatible intraoral receptacle with an X-ray source therein.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 5, 2015
    Inventor: EHUD NACHALIEL
  • Patent number: 8938049
    Abstract: A mesh electrode adhesion structure includes: a substrate, and an opening defined in the substrate; a mesh electrode on the substrate, and a first combination groove defined in the mesh electrode; and an adhesion layer between the substrate and the mesh electrode. The mesh electrode includes: a mesh region corresponding to the opening defined in the substrate, and an adhesion region in which the first combination groove exposes the adhesion layer.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: January 20, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Do-yoon Kim, Yong-chul Kim, Il-hwan Kim, Shang-hyeun Park, Tae-won Jeong
  • Patent number: 8927689
    Abstract: A tubular or spherical nanostructure composed of a plurality of peptides, wherein each of the plurality of peptides includes no more than 4 amino acids and whereas at least one of the 4 amino acids is an aromatic amino acid.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: January 6, 2015
    Assignee: Ramot at Tel-Aviv University Ltd.
    Inventors: Meital Reches, Ehud Gazit
  • Publication number: 20140376964
    Abstract: An electrophotographic imaging device includes a charging device, a cleaning device, and a fuser member that each include hydrophobic carbon nanotubes. The use of hydrophobic carbon nanotubes can increases the charging device's, the cleaning device's, and the fuser member's durability, conductivity, and contaminants deposition.
    Type: Application
    Filed: September 8, 2014
    Publication date: December 25, 2014
    Inventors: Liang-Bih Lin, David H Pan, Daniel Levy, Jin Wu
  • Patent number: 8916394
    Abstract: A carbon nanotube field emission device with overhanging gate fabricated by a double silicon-on-insulator process. Other embodiments are described and claimed.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: December 23, 2014
    Assignee: California Institute of Technology
    Inventors: Risaku Toda, Michael J. Bronikowski, Edward M. Luong, Harish Manohara
  • Publication number: 20140361225
    Abstract: A kind of photosensitive carbon nanotube slurry is disclosed. The photosensitive carbon nanotube slurry includes a first mixture and a second mixture. The first mixture includes carbon nanotubes, conducting particles, and a first organic carrier. The second mixture includes a photo polymerization monomer, a photo initiator, and a second organic carrier. The weight percentage of the first mixture and the second mixture ranges from about 50% to about 80% and about 20% to about 50%, respectively. Methods for making the photosensitive carbon nanotube slurry and methods for making cathode emitters using the photosensitive carbon nanotube slurry are also disclosed.
    Type: Application
    Filed: August 22, 2014
    Publication date: December 11, 2014
    Inventors: PENG LIU, CHUN-HAI ZHANG, SHOU-SHAN FAN
  • Patent number: 8900029
    Abstract: The present application relates to a method for making a carbon nanotube field emitter. A carbon nanotube film is drawn from the carbon nanotube array by a drawing tool. The carbon nanotube film includes a triangle region. A portion of the carbon nanotube film closed to the drawing tool is treated into a carbon nanotube wire including a vertex of the triangle region. The triangle region is cut from the carbon nanotube film by a laser beam along a cutting line. A distance between the vertex of the triangle region and the cutting line can be in a range from about 10 microns to about 5 millimeters.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: December 2, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Peng Liu, Shou-Shan Fan
  • Publication number: 20140321619
    Abstract: An X-ray tube, a medical X-ray device comprising such X-raytube and a method for operating such X-ray tube are proposed. The X-ray tube (1) comprises an electron emitter (3) with a substrate (4) having an electron emission surface (5). The electron emission surface (5) is adapted for field emission of electrons therefrom by providing a substantial roughness Such roughness may be obtained by applying carbon nano-tubes (19) onto the electron emission surface (5). A field generator (7) is provided for generating an electrical field adjacent to the electron emission surface (5) for inducing field emission of electrons therefrom. Furthermore, a heater arrangement (15) is provided and adapted for heating the electron emission surface (5) contemporaneous with the field emission of electrons. Accordingly, while electrons are emitted from the electron emission surface (5) due to a field effect, this electron emission surface (5) may also be heated to substantial temperatures of between 100 and 1000° C.
    Type: Application
    Filed: November 14, 2012
    Publication date: October 30, 2014
    Inventors: Anand Kumar Dokania, Gereon Vogtmeier, Peter Klaur Bachmann
  • Publication number: 20140292181
    Abstract: An electron emission device and a method of manufacturing the same are provided. The electron emission device includes i) a hydrophilic resin substrate and ii) carbon nano tubes that are positioned on the resin substrate. Surface roughness Ra of the resin substrate is 7.3 ?m to 9.75 ?m.
    Type: Application
    Filed: April 23, 2013
    Publication date: October 2, 2014
    Applicant: Intellectual Discovery Co., Ltd.
    Inventor: Intellectual Discovery Co., Ltd.
  • Publication number: 20140292180
    Abstract: An electron emission device and a method of manufacturing the same are provided. The electron emission device includes: i) a substrate including a metal tip; ii) carbon nano tubes that are positioned on the metal tip; and iii) a lithium layer that is positioned on the carbon nano tubes.
    Type: Application
    Filed: April 23, 2013
    Publication date: October 2, 2014
    Applicant: Intellectual Discovery Co., Ltd.
    Inventor: Intellectual Discovery Co., Ltd.
  • Publication number: 20140270087
    Abstract: An x-ray generator includes a housing, a cathode block that is arranged in the housing and emits electrons via a field emission scheme, an anode block that is arranged in the housing and generates x-rays in response to the electrons emitted from the cathode block and collide with the anode block, and a heat sink block that contacts the cathode block and dissipates heat generated therein to an outside of the housing.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicants: SRI INTERNATIONAL, Samsung Electronics Co., Ltd.
    Inventors: Shang-hyeun PARK, Paul R. SCHWOEBEL, Il-hwan KIM, Do-yoon KIM, Yong-chul KIM, Chang-soo LEE, Tae-won JEONG
  • Publication number: 20140273706
    Abstract: The present disclosure includes field emission device embodiments. The present disclosure also includes method embodiments for forming field emitting devices. One device embodiment includes a housing defining an interior space including a lower portion and an upper portion, a cathode positioned in the lower portion of the housing, a elongate nanostructure coupled to the cathode, an anode positioned in the upper portion of the housing, and a control grid positioned between the elongate nanostructure and the anode to control electron flow between the anode and the elongate nanostructure.
    Type: Application
    Filed: April 11, 2014
    Publication date: September 18, 2014
    Applicant: Micron Technology, Inc.
    Inventor: Neal R. Rueger
  • Patent number: 8810131
    Abstract: A field emission device is configured as a heat engine with an AC output.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: August 19, 2014
    Inventors: Jesse R. Cheatham, III, Philip Andrew Eckhoff, William Gates, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, Tony S. Pan, Robert C. Petroski, Clarence T. Tegreene, David B. Tuckerman, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y. H. Wood
  • Patent number: 8803410
    Abstract: The present disclosure relates to a field emission device. The field emission device includes a carbon nanotube structure and two electrodes electrically connected with the carbon nanotube structure. The carbon nanotube structure includes a carbon nanotube array, a carbon nanotube layer located on one side of the carbon nanotube array, and a carbon nanotube cluster between the carbon nanotube array and the carbon nanotube layer. The carbon nanotube array includes a number of first carbon nanotubes that are parallel with each other. The carbon nanotube layer includes a number of second carbon nanotubes. The carbon nanotube cluster includes a plurality of third carbon nanotubes that are entangled around both the plurality of first carbon nanotubes and the plurality of second carbon nanotubes.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: August 12, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Peng Liu, Kai-Li Jiang, Shou-Shan Fan
  • Publication number: 20140204297
    Abstract: The present invention discloses a light tunable device includes two substrates, a light tunable layer sealed between the two substrates, two electrodes formed on the two substrates, a tuning device coupled to the two electrodes to control bias for the two electrodes to control the status of the light tunable layer to have at least three statues.
    Type: Application
    Filed: January 17, 2014
    Publication date: July 24, 2014
    Inventor: Kuo-Ching Chiang
  • Publication number: 20140148074
    Abstract: Systems and methods in accordance with embodiments of the invention implement carbon nanotube-based field emitters. In one embodiment, a method of fabricating a carbon nanotube field emitter includes: patterning a substrate with a catalyst, where the substrate has thereon disposed a diffusion barrier layer; growing a plurality of carbon nanotubes on at least a portion of the patterned catalyst; and heating the substrate to an extent where it begins to soften such that at least a portion of at least one carbon nanotube becomes enveloped by the softened substrate.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 29, 2014
    Applicant: California Institute of Technology
    Inventors: Harish Manohara, Valerie Kristof, Risaku Toda
  • Publication number: 20140141686
    Abstract: Systems and methods in accordance with embodiments of the invention proficiently produce carbon nanotube-based vacuum electronic devices. In one embodiment a method of fabricating a carbon nanotube-based vacuum electronic device includes: growing carbon nanotubes onto a substrate to form a cathode; assembling a stack that includes the cathode, an anode, and a first layer that includes an alignment slot; disposing a microsphere partially into the alignment slot during the assembling of the stack such that the microsphere protrudes from the alignment slot and can thereby separate the first layer from an adjacent layer; and encasing the stack in a vacuum sealed container.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 22, 2014
    Applicant: California Institute of Technology
    Inventors: Harish Manohara, Risaku Toda, Linda Y. Del Castillo, Rakesh Murthy
  • Patent number: 8723407
    Abstract: Methods for selectively depositing nanostructures on a support layer include contacting the support layer with functionalized catalyst particles. The functionalized catalyst particles can form a self-assembled monolayer of catalyst particles on the support layer and the functionalized catalyst particles can be used to catalyze nanostructure growth. In one embodiment of the disclosed method, zinc oxide nanowires are grown on a patterned substrate using functionalized gold nanoparticles. Patterned arrays of self-assembled nanostructures and nanoscale devices using such nanostructure arrays are also described.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: May 13, 2014
    Assignee: The State of Oregon Acting by and Through the State Board of Higher Education on Behalf of the University of Oregon
    Inventors: James E. Hutchison, Daisuke Ito
  • Patent number: 8710727
    Abstract: A field emission cathode structure includes a first carbon nanotube structure including a plurality of first carbon nanotubes, and a second carbon nanotube structure located on the surface of the first carbon nanotube structure. The second carbon nanotube structure includes a plurality of second carbon nanotubes substantially perpendicular to the first carbon nanotubes structure. The second carbon nanotube structure includes a peak. The heights of the second carbon nanotubes at the peak are tallest. The heights of the carbon second carbon nanotubes gradually decrease along the direction away from the peak. A method for fabricating the field emission cathode structure is also presented.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: April 29, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Peng Liu, Shou-Shan Fan
  • Publication number: 20140111081
    Abstract: Disclosed is a field emitter electrode including a bonding unit formed on a substrate, and a plurality of carbon nanotubes fixed to the substrate by the bonding unit, in which the bonding unit includes a carbide-based first inorganic filler and a second inorganic filler formed of a metal.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 24, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jin Woo Jeong, Jae-woo Kim, Yoon-Ho Song, Jun Tae Kang, Sungyoul Choi
  • Publication number: 20140097741
    Abstract: A field emission electron source includes a linear carbon nanotube structure, an insulating layer and at least one conductive ring. The linear carbon nanotube structure has a first end and a second end. The insulating layer is located on outer surface of the linear carbon nanotube structure. The first conductive ring includes a first ring face 1301 and a second ring face, an end surface of the linear carbon nanotube structure, and the first ring face are coplanar.
    Type: Application
    Filed: December 18, 2012
    Publication date: April 10, 2014
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: CAI-LIN GUO, JIE TANG, PENG LIU, SHOU-SHAN FAN
  • Publication number: 20140055027
    Abstract: A method for fabricating field emission cathode, a field emission cathode, and a field emission lighting source are provided. The method includes: forming a catalyst crystallite nucleus layer on the surface of cathode substrate by self-assembly of a noble metal catalyst, growing a composited nano carbon material on the cathode substrate by using a TCVD process, in which the composited nano carbon material includes coil carbon nano tubes and coil carbon nano fibers. The measured quantity of total coil carbon nano tubes and coil carbon nano fibers is higher than 40%. The field emission cathode is fabricated by the aforementioned method, and the field emission lighting source includes the aforementioned field emission cathode.
    Type: Application
    Filed: March 20, 2013
    Publication date: February 27, 2014
    Applicant: National Defense University
    Inventors: MING-DER GER, NEN-WEN PU, YIH-MING LIU, KUN-JU CHUNG
  • Patent number: 8642126
    Abstract: A carbon nanotube device has a substrate (1), a layer (3) having a space (5) which penetrates in the vertical direction of the substrate (1), and carbon nanotubes (7) formed on the surface of the substrate facing the space (5) in such a manner as to have number density distributions successively changed according to the distances from the center of the space (5), the supply amount of catalyst substances is diluted by supplying the catalyst substances through an opening of a coating film (4) opposite to the substrate (1) and the hole (5), a catalyst having a nominal thickness distribution according to the way how the space (5) appears is formed on the substrate (1) facing the space (5), and a carbon source is supplied, thereby forming carbon nanotubes having the number density distribution are formed on the substrate (1).
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: February 4, 2014
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventor: Suguru Noda
  • Publication number: 20140027655
    Abstract: A tubular or spherical nanostructure composed of a plurality of peptides, wherein each of the plurality of peptides includes no more than 4 amino acids and whereas at least one of the 4 amino acids is an aromatic amino acid.
    Type: Application
    Filed: November 8, 2012
    Publication date: January 30, 2014
    Applicant: Ramot at Tel-Aviv University Ltd.
    Inventor: Ramot at Tel-Aviv University Ltd.
  • Publication number: 20140010347
    Abstract: A mesh electrode adhesion structure includes: a substrate, and an opening defined in the substrate; a mesh electrode on the substrate, and a first combination groove defined in the mesh electrode; and an adhesion layer between the substrate and the mesh electrode. The mesh electrode includes: a mesh region corresponding to the opening defined in the substrate, and an adhesion region in which the first combination groove exposes the adhesion layer.
    Type: Application
    Filed: May 14, 2013
    Publication date: January 9, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Do-yoon KIM, Yong-chul KIM, Il-hwan KIM, Shang-hyeun PARK, Tae-won JEONG
  • Publication number: 20140004768
    Abstract: A method for making carbon nanotube field emitter includes providing a carbon nanotube array formed on a surface of a substrate. A plurality of carbon nanotubes of the carbon nanotube array is selected and pulled out a carbon nanotube film by a drawing tool, wherein the carbon nanotube film includes a plurality of carbon nanotubes oriented along a fixed direction. The carbon nanotube film is cut to a plurality of uniform carbon nanotube sub-films along the fixed direction. The plurality of carbon nanotube sub-films is treated to a plurality of carbon nanotube yarns. The plurality of carbon nanotube yarns is fixed on a surface of a conductive base, and cutting off the plurality of carbon nanotube yarns by a laser beam, to form a carbon nanotube field emitter.
    Type: Application
    Filed: December 28, 2012
    Publication date: January 2, 2014
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: PENG LIU, LI-JIANG XU, DUAN-LIANG ZHOU, CHUN-HAI ZHANG, SHOU-SHAN FAN
  • Publication number: 20130342106
    Abstract: A thermionic emission device includes an insulating substrate, a patterned carbon nanotube film structure, a positive electrode and a negative electrode. The insulating substrate includes a surface. The surface includes an edge. The patterned carbon nanotube film structure is partially arranged on the surface of the insulating substrate. The patterned carbon nanotube film structure includes two strip-shaped arms joined at one end to form a tip portion protruded from the edge of the surface of the insulating substrate and suspended. The patterned carbon nanotube film structure includes a number of carbon nanotubes parallel to the surface of the insulating substrate. The patterned carbon nanotube film structure is connected between the positive electrode and the negative electrode in series.
    Type: Application
    Filed: August 23, 2012
    Publication date: December 26, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Publication number: 20130313963
    Abstract: A carbon nanotube layer for a field emission cathode where individual carbon nanotubes or small groups of carbon nanotubes that stick out from the surface more than the rest of the layer are avoided. Electron fields will concentrate on these sharp points, creating an enhanced image on the phosphor, resulting in a more luminous spot than the surroundings. Activation processes further free such carbon nanotubes or groups of carbon nanotubes sticking out from the surface, exasperating the problem.
    Type: Application
    Filed: March 11, 2013
    Publication date: November 28, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: SAMSUNG ELECTRONICS CO., LTD.
  • Publication number: 20130293090
    Abstract: The present disclosure relates to a field emission device. The field emission device includes a carbon nanotube structure and two electrodes electrically connected with the carbon nanotube structure. The carbon nanotube structure includes a carbon nanotube array, a carbon nanotube layer located on one side of the carbon nanotube array, and a carbon nanotube cluster between the carbon nanotube array and the carbon nanotube layer. The carbon nanotube array includes a number of first carbon nanotubes that are parallel with each other. The carbon nanotube layer includes a number of second carbon nanotubes. The carbon nanotube cluster includes a plurality of third carbon nanotubes that are entangled around both the plurality of first carbon nanotubes and the plurality of second carbon nanotubes.
    Type: Application
    Filed: December 11, 2012
    Publication date: November 7, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: PENG LIU, KAI-LI JIANG, SHOU-SHAN FAN
  • Publication number: 20130295815
    Abstract: Provided are an electron emission source, a display apparatus using the same, an electronic device, and a method of manufacturing the display apparatus. The electron emission source includes a substrate, a cathode separately manufactured from the substrate, and a needle-shaped electron emission material layer, e.g., carbon nanotube (CNT) layer, fixed to the cathode by an adhesive layer. The CNT layer is formed by a suspension filtering method, and electron emission density is increased by a subsequent taping process on the electron emission material layer.
    Type: Application
    Filed: July 11, 2013
    Publication date: November 7, 2013
    Applicant: KOREA UNIVERSITY INDUSTRIAL & ACADEMIC COLLABORATION FOUNDATION
    Inventors: Cheol Jin LEE, Seung Il Jung
  • Publication number: 20130285009
    Abstract: Described is a lateral field emission device emitting electrons in parallel with respect to a substrate. Electron emission materials having a predetermined thickness are arranged in a direction with respect to the substrate on a supporting portion. An anode is disposed on a side portion of the substrate, the anode corresponding to the electron emission materials.
    Type: Application
    Filed: January 10, 2012
    Publication date: October 31, 2013
    Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Cheol Jin Lee, Dong Hoon Shin
  • Publication number: 20130280830
    Abstract: A carbon nanotube field emission device with overhanging gate fabricated by a double silicon-on-insulator process. Other embodiments are described and claimed.
    Type: Application
    Filed: June 17, 2013
    Publication date: October 24, 2013
    Inventors: Risaku TODA, Michael J. BRONIKOWSKI, Edward M. LUONG, Harish MANOHARA
  • Patent number: 8557213
    Abstract: A novel carbon nanotube (64) is featured in that it has the highest Raman scattering intensity in the vicinity of 1580 cm?1 in its Raman spectrum. Carbon nanotubes can be grown on and from the catalytic fine particles (63) which consist of ultra-fine particles of cobalt oxide catalyst onto a substrate comprising a conductive substrate (62) and fine particles (63) of catalyst formed on a surface thereof. An electron emission device (60) so configured as to emit electrons by applying a voltage to apical ends (64a) of such carbon nanotubes (64) can be reduced in driving voltage and can achieve a current such as to emit a fluorescent material on the market for low-velocity electron beams. The electron emission device (60) needs no gate and can thus simplify the structure and reduce the cost of a surface light-emitting device for which the element is used.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: October 15, 2013
    Assignees: National Institute for Materials Science, Toppan Printing Co., Ltd.
    Inventors: Toshihiro Ando, Kiyoharu Nakagawa, Mika Gamo, Hidenori Gamo
  • Publication number: 20130264936
    Abstract: Devices for use in cold-field emission and methods of forming the device are generally presented. In one example, a method may include providing a conductive base, dispersing carbon-filled acrylic onto the conductive base to form a conductive film, coupling a copper plate to a first side of the conductive film, and irradiating the conductive film. The method may further include dispersing carbon nanotubes (CNTs) on a second side of the conductive film to form a substantially uniform layer of CNTs, removing excess CNTs from the second side, and curing the conductive film. In one example, a device may include a polycarbonate base, a layer of carbon-filled acrylic on one side of the polycarbonate base and a layer of irradiated carbon-filled acrylic on the other, a copper plate coupled to the carbon-filled acrylic, and a substantially uniform layer of randomly aligned CNTs dispersed on the irradiated carbon-filled acrylic.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 10, 2013
    Applicant: INDIAN INSTITUTE OF SCIENCE BANGALORE
    Inventors: Sandeep Venkit Anand, Arvind Krishnaswamy, Debiprosad Roy Mahapatra
  • Publication number: 20130260634
    Abstract: The present application relates to a method for making a carbon nanotube field emitter. A carbon nanotube film is drawn from the carbon nanotube array by a drawing tool. The carbon nanotube film includes a triangle region. A portion of the carbon nanotube film closed to the drawing tool is treated into a carbon nanotube wire including a vertex of the triangle region. The triangle region is cut from the carbon nanotube film by a laser beam along a cutting line. A distance between the vertex of the triangle region and the cutting line can be in a range from about 10 microns to about 5 millimeters.
    Type: Application
    Filed: October 22, 2012
    Publication date: October 3, 2013
    Inventors: PENG LIU, SHOU-SHAN FAN
  • Publication number: 20130257262
    Abstract: The present application relates to a carbon nanotube field emitter. The carbon nanotube field emitter includes a carbon nanotube structure. The carbon nanotube structure includes a plurality of carbon nanotubes joined end-to-end by van der waals attractive force. The carbon nanotube structure has two joined portions, one portion is a triangle shaped carbon nanotube film, which is an electron emitting portion, the other portion is a carbon nanotube wire, which is a support portion.
    Type: Application
    Filed: October 22, 2012
    Publication date: October 3, 2013
    Inventors: PENG LIU, SHOU-SHAN FAN
  • Publication number: 20130241389
    Abstract: A field emission device includes a substrate and a plurality of wires embedded in the substrate. The plurality of wires has at least a field emitter cathode wire; a control grid wire array; and a collector anode array. The field emitter cathode wire, control grid wire array, and collector anode array are embedded in and extend through a nonconductive substrate matrix. A method for making a vacuum field emission device is also disclosed.
    Type: Application
    Filed: March 14, 2012
    Publication date: September 19, 2013
    Applicant: UT-BATTELLE, LLC
    Inventors: Roger A. KISNER, Kofi KORSAH, John T. SIMPSON, Alexander M. MELIN
  • Publication number: 20130234025
    Abstract: A field-emission electron gun including an electron emission tip, an extractor anode, and a mechanism creating an electric-potential difference between the emission tip and the extractor anode. The emission tip includes a metal tip and an end cone produced by chemical vapor deposition on a nanofilament, the cone being aligned and welded onto the metal tip. The electron gun can be used for a transmission electron microscope.
    Type: Application
    Filed: September 16, 2011
    Publication date: September 12, 2013
    Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
    Inventors: Marc Monthioux, Florent Houdellier
  • Publication number: 20130221836
    Abstract: A field emission electron source includes a carbon nanotube micro-tip structure. The carbon nanotube micro-tip structure includes an insulating substrate and a patterned carbon nanotube film structure. The insulating substrate includes a surface. The surface includes an edge. The patterned carbon nanotube film structure is partially arranged on the surface of the insulating substrate. The patterned carbon nanotube film structure includes two strip-shaped arms joined at one end to form a tip portion protruded from the edge of the surface of the insulating substrate and suspended. Each of the two strip-shaped arms includes a plurality of carbon nanotubes parallel to the surface of the insulating substrate. A field emission device is also disclosed.
    Type: Application
    Filed: August 23, 2012
    Publication date: August 29, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Publication number: 20130221843
    Abstract: A field emission device is configured as a heat engine with an AC output.
    Type: Application
    Filed: April 10, 2013
    Publication date: August 29, 2013
    Inventor: Elwha LLC
  • Publication number: 20130214244
    Abstract: Devices and methods are described for a cathode having a plurality of apertures in an insulating layer, pits in a substrate layer, and emitters in the pit. The device can also have gate layer on top of the insulating layer which has an opening that is substantially aligned with the pit and the aperture. The emitter can be an array of substantially aligned carbon nanotubes. The device and method produces cathodes that are designed to avoid shorting of the cathode due to emitter-gate contact and other fabrication challenges.
    Type: Application
    Filed: February 20, 2013
    Publication date: August 22, 2013
    Applicant: GEORGIA TECH RESEARCH CORPORATION
    Inventor: GEORGIA TECH RESEARCH CORPORATION
  • Publication number: 20130200776
    Abstract: The present invention relates to afield emission cathode, comprising an at least partly electrically conductive base structure, and a plurality of electrically conductive micrometer sized sections spatially distributed at the base structure, wherein at least a portion of the plurality of micrometer sized sections each are provided with a plurality of electrically conductive nanostructures. Advantages of the invention include lower power consumption as well as an increase in light output of e.g. a field emission lighting arrangement comprising the field emission cathode.
    Type: Application
    Filed: April 4, 2011
    Publication date: August 8, 2013
    Applicant: LIGHTLAB SWEDEN AB
    Inventor: Qiu-Hong Hu
  • Publication number: 20130187123
    Abstract: A field-emission device is disclosed. The device comprises a solid state structure formed of a crystalline material and an amorphous material, wherein an outer surface of the solid state structure is substantially devoid of the amorphous material, and wherein a p-type conductivity of the crystalline material is higher at or near the outer surface than far from the outer surface.
    Type: Application
    Filed: January 17, 2013
    Publication date: July 25, 2013
    Applicant: Technion Research & Development Foundation Ltd.
    Inventor: Technion Research & Development Foundation Ltd.
  • Publication number: 20130168635
    Abstract: A field emission device is configured as a heat engine. Different embodiments of the heat engine may have different configurations that may include a cathode, gate, suppressor, and anode arranged in different ways according to a particular embodiment. Different embodiments of the heat engine may also incorporate different materials in and/or proximate to the cathode, gate, suppressor, and anode.
    Type: Application
    Filed: August 16, 2012
    Publication date: July 4, 2013
    Inventors: Jesse R. Cheatham, III, Philip Andrew Eckhoff, William Gates, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, Tony S. Pan, Robert C. Petroski, Clarence T. Tegreene, David B. Tuckerman, Charles Whitmer, Lowell L. Wood, JR., Victoria Y.H. Wood
  • Publication number: 20130165011
    Abstract: A method for making a field emission cathode device, including the following steps: (S1) providing a substrate including a first surface, and a carbon nanotube structure defining a first portion and a second portion, the carbon nanotube structure including a plurality of carbon nanotubes, a longitudinal direction of the plurality of carbon nanotubes being from the first portion to the second portion; (S2) placing the carbon nanotube structure on the first surface of the substrate, and fastening the first portion to the substrate; and (S3) repeatedly rubbing the carbon nanotube structure along the direction from the first portion to the second portion.
    Type: Application
    Filed: August 21, 2012
    Publication date: June 27, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: PENG LIU, SHOU-SHAN FAN
  • Publication number: 20130162137
    Abstract: A field emission cathode device includes a substrate and a carbon nanotube structure. The substrate includes a first surface. The carbon nanotube structure defines a contact body and an emission body. The contact body is contacted to the first surface of substrate. The emission body is curved away from the first surface. The carbon nanotube structure includes a number of carbon nanotubes joined end to end from the contact body to the emission body to form a continuous structure.
    Type: Application
    Filed: August 21, 2012
    Publication date: June 27, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: PENG LIU, SHOU-SHAN FAN
  • Publication number: 20130143465
    Abstract: A method for making a field emission cathode device is provided. A filler, a substrate, and a metal plate are provided. The metal plate has a first surface and a second surface opposite to the first surface, and defines at least one through hole extending through from the first surface to the second surface. At least one electron emitter is inserted into the at least one through hole. The first surface of the metal plate is attached to the substrate. At least a part of the at least one electron emitter is located between the first surface and the substrate. The at least one through hole is filled with the filler to firmly fix the at least one electron emitter.
    Type: Application
    Filed: January 30, 2013
    Publication date: June 6, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.