FR2656954B1 - Cathode pour tube electronique et son procede de fabrication. - Google Patents

Cathode pour tube electronique et son procede de fabrication.

Info

Publication number
FR2656954B1
FR2656954B1 FR909000171A FR9000171A FR2656954B1 FR 2656954 B1 FR2656954 B1 FR 2656954B1 FR 909000171 A FR909000171 A FR 909000171A FR 9000171 A FR9000171 A FR 9000171A FR 2656954 B1 FR2656954 B1 FR 2656954B1
Authority
FR
France
Prior art keywords
cathode
manufacturing
electronic tube
electronic
tube
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
FR909000171A
Other languages
English (en)
Other versions
FR2656954A1 (fr
Inventor
Jung Jongin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung SDI Co Ltd
Original Assignee
Samsung Electron Devices Co Ltd
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 Samsung Electron Devices Co Ltd filed Critical Samsung Electron Devices Co Ltd
Publication of FR2656954A1 publication Critical patent/FR2656954A1/fr
Application granted granted Critical
Publication of FR2656954B1 publication Critical patent/FR2656954B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part
    • H01J9/047—Cathodes having impregnated bodies
    • 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
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • 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
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Powder Metallurgy (AREA)
FR909000171A 1989-11-02 1990-01-09 Cathode pour tube electronique et son procede de fabrication. Expired - Lifetime FR2656954B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/431,381 US4986788A (en) 1989-11-02 1989-11-02 Process of forming an impregnated cathode

Publications (2)

Publication Number Publication Date
FR2656954A1 FR2656954A1 (fr) 1991-07-12
FR2656954B1 true FR2656954B1 (fr) 1992-05-07

Family

ID=23711697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR909000171A Expired - Lifetime FR2656954B1 (fr) 1989-11-02 1990-01-09 Cathode pour tube electronique et son procede de fabrication.

Country Status (4)

Country Link
US (1) US4986788A (fr)
FR (1) FR2656954B1 (fr)
GB (1) GB2237925B (fr)
NL (1) NL9000065A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4206909A1 (de) * 1992-03-05 1993-09-09 Philips Patentverwaltung Thermionisch emittierendes kathodenelement
US6779951B1 (en) * 2000-02-16 2004-08-24 U.S. Synthetic Corporation Drill insert using a sandwiched polycrystalline diamond compact and method of making the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652835A (en) * 1979-10-01 1981-05-12 Hitachi Ltd Impregnated cathode
US4379979A (en) * 1981-02-06 1983-04-12 The United States Of America As Represented By The Secretary Of The Navy Controlled porosity sheet for thermionic dispenser cathode and method of manufacture
NL8403031A (nl) * 1984-10-05 1986-05-01 Philips Nv Werkwijze voor het vervaardigen van een scandaatnaleveringskathode en scandaatnaleveringskathode vervaardigd volgens deze werkwijze.
NL8501257A (nl) * 1985-05-03 1986-12-01 Philips Nv Werkwijze voor het vervaardigen van een naleveringskathode en toepassing van de werkwijze.
EP0248417B1 (fr) * 1986-06-06 1992-11-11 Kabushiki Kaisha Toshiba Cathode imprégnée
US4835052A (en) * 1988-02-18 1989-05-30 Hi-Control Limited Abrasive sheet with the surface of the abrasive particles cleaned and method of making
KR910009660B1 (ko) * 1988-02-23 1991-11-25 미쓰비시전기 주식회사 전자관용 산화물피복음극
US4894257A (en) * 1988-07-05 1990-01-16 The United States Of America As Represented By The Secretary Of America Method of overcoating a high current density cathode with rhodium

Also Published As

Publication number Publication date
US4986788A (en) 1991-01-22
GB2237925B (en) 1994-03-30
GB2237925A (en) 1991-05-15
GB8925237D0 (en) 1989-12-28
NL9000065A (nl) 1991-08-01
FR2656954A1 (fr) 1991-07-12

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Legal Events

Date Code Title Description
ST Notification of lapse