BR0215809A - field emission cold cathode - Google Patents

field emission cold cathode

Info

Publication number
BR0215809A
BR0215809A BRPI0215809-4A BR0215809A BR0215809A BR 0215809 A BR0215809 A BR 0215809A BR 0215809 A BR0215809 A BR 0215809A BR 0215809 A BR0215809 A BR 0215809A
Authority
BR
Brazil
Prior art keywords
field emission
cold cathode
carbon
emission cold
base material
Prior art date
Application number
BRPI0215809-4A
Other languages
Portuguese (pt)
Inventor
Donald A Shiffler
Original Assignee
Us Air Force
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Us Air Force filed Critical Us Air Force
Publication of BR0215809A publication Critical patent/BR0215809A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/304—Field-emissive cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/022—Manufacture of electrodes or electrode systems of cold cathodes
    • H01J9/025—Manufacture of electrodes or electrode systems of cold cathodes of field emission cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/30—Cold cathodes
    • H01J2201/304—Field emission cathodes
    • H01J2201/30446—Field emission cathodes characterised by the emitter material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

"CATODO FRIO DE EMISSãO DE CAMPO". A presente invenção refere-se a um catodo frio de emissão de campo (11) para utilização em tubos de vácuo. Um material de veludo de carbono (25) está compreendido de fibras de carbono de alta razão de aspecto embutidas perpendiculares a um material de base. As pontas e/ou as hastes do material de veludo de carbono (25) são revestidas com um sal cesiado de baixa função de trabalho. O material de base do material de veludo de carbono (25) está aderido a uma superfície de catodo (27). O catodo frio (11) emite elétrons quando um campo elétrico é aplicado, mesmo a temperaturas de operação menores do que 900<198>C."COLD FIELD EMISSION CATHOD". The present invention relates to a field emission cold cathode (11) for use in vacuum tubes. A carbon velvet material 25 is comprised of embedded high aspect ratio carbon fibers perpendicular to a base material. The tips and / or rods of the carbon velvet material (25) are coated with a low working function cesarean salt. The base material of the carbon velvet material (25) is adhered to a cathode surface (27). Cold cathode (11) emits electrons when an electric field is applied, even at operating temperatures below 900 <198> C.

BRPI0215809-4A 2002-07-18 2002-07-18 field emission cold cathode BR0215809A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2002/021283 WO2004010450A1 (en) 2002-07-18 2002-07-18 Field emission cold cathode

Publications (1)

Publication Number Publication Date
BR0215809A true BR0215809A (en) 2007-03-20

Family

ID=30769013

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0215809-4A BR0215809A (en) 2002-07-18 2002-07-18 field emission cold cathode

Country Status (10)

Country Link
EP (1) EP1523751A1 (en)
JP (1) JP4295215B2 (en)
CN (2) CN101527238B (en)
AU (1) AU2002322392B2 (en)
BR (1) BR0215809A (en)
CA (1) CA2492853C (en)
EA (1) EA009410B1 (en)
HK (2) HK1078678A1 (en)
IL (1) IL166173A (en)
WO (1) WO2004010450A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2487433C1 (en) * 2011-12-29 2013-07-10 Открытое акционерное общество "Центральный научно-исследовательский институт "Электрон" Cathode pack of vacuum tube for high-voltage operation
CN107385376B (en) * 2017-08-04 2019-07-19 华中科技大学 A kind of spray caesium device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6091186A (en) * 1996-11-13 2000-07-18 The Board Of Trustees Of The Leland Stanford Junior University Carbon-containing cathodes for enhanced electron emission
JP3610325B2 (en) * 2000-09-01 2005-01-12 キヤノン株式会社 Electron emitting device, electron source, and method of manufacturing image forming apparatus

Also Published As

Publication number Publication date
EP1523751A1 (en) 2005-04-20
AU2002322392A1 (en) 2004-02-09
IL166173A0 (en) 2006-01-15
CN101527238B (en) 2011-07-13
CN1639821A (en) 2005-07-13
AU2002322392B2 (en) 2009-05-28
JP4295215B2 (en) 2009-07-15
EA009410B1 (en) 2007-12-28
JP2005533356A (en) 2005-11-04
WO2004010450A1 (en) 2004-01-29
HK1078678A1 (en) 2006-03-17
EA200500228A1 (en) 2005-08-25
CN101527238A (en) 2009-09-09
IL166173A (en) 2012-02-29
HK1135794A1 (en) 2010-06-11
CA2492853A1 (en) 2004-01-29
CA2492853C (en) 2009-03-31
AU2002322392A2 (en) 2004-02-09
CN100508100C (en) 2009-07-01

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 10A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2162 DE 12/06/2012.