JPS5693244A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS5693244A
JPS5693244A JP16986479A JP16986479A JPS5693244A JP S5693244 A JPS5693244 A JP S5693244A JP 16986479 A JP16986479 A JP 16986479A JP 16986479 A JP16986479 A JP 16986479A JP S5693244 A JPS5693244 A JP S5693244A
Authority
JP
Japan
Prior art keywords
plane
chip
single crystal
inclined surfaces
emission
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.)
Granted
Application number
JP16986479A
Other languages
Japanese (ja)
Other versions
JPH0128450B2 (en
Inventor
Tadahiro Takigawa
Isao Sasaki
Kakuki Motoyama
Takashi Meguro
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.)
Toshiba Corp
Shibaura Machine Co Ltd
Original Assignee
Toshiba Corp
Toshiba Machine Co Ltd
Tokyo Shibaura Electric 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 Toshiba Corp, Toshiba Machine Co Ltd, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16986479A priority Critical patent/JPS5693244A/en
Publication of JPS5693244A publication Critical patent/JPS5693244A/en
Publication of JPH0128450B2 publication Critical patent/JPH0128450B2/ja
Granted legal-status Critical Current

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
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To prevent the emission pattern and cross-over form from splitting by selecting the bearing of a face with low work function of a single crystal material and exposuring a face with high work function on inclined surfaces at the top of the chip. CONSTITUTION:The axis bearing of a quadrangular prism-shaped LaB6 single crystal chip is selected in the direction of <100> or within 5 deg. from <100>, the top of the chip is cut to form a quadrangular pyramid so that four inclined surfaces coincide with <111> plane, and the top is cut to form a falt surface of 50mumX 50mum. Work functions of LaB6 are 2.3eV on <310> plane, 2.6eV on <100> plane, 2.7eV on <100> plane, and 3.6eV on <111> plane, thus, when thermions are emitted from the single crystal chip, electrons are emitted from the top flat surface prior to emission from inclined surfaces. Thus, the splitting of the emission patern and cross over form into several spots due to the chip temperature and bias voltage is prevented.
JP16986479A 1979-12-26 1979-12-26 Electron gun Granted JPS5693244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16986479A JPS5693244A (en) 1979-12-26 1979-12-26 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16986479A JPS5693244A (en) 1979-12-26 1979-12-26 Electron gun

Publications (2)

Publication Number Publication Date
JPS5693244A true JPS5693244A (en) 1981-07-28
JPH0128450B2 JPH0128450B2 (en) 1989-06-02

Family

ID=15894356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16986479A Granted JPS5693244A (en) 1979-12-26 1979-12-26 Electron gun

Country Status (1)

Country Link
JP (1) JPS5693244A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57196445A (en) * 1981-05-26 1982-12-02 Ibm Forming electron beam generator
US4486684A (en) * 1981-05-26 1984-12-04 International Business Machines Corporation Single crystal lanthanum hexaboride electron beam emitter having high brightness
JP2005228741A (en) * 2004-02-10 2005-08-25 Nuflare Technology Inc High-luminance thermionic cathode
JP2019114340A (en) * 2017-12-21 2019-07-11 株式会社ニューフレアテクノロジー Cathode
WO2022064557A1 (en) * 2020-09-23 2022-03-31 株式会社日立ハイテク Electron source, method for manufacturing same, and electron beam device in which same is used

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5211056A (en) * 1975-07-16 1977-01-27 Nippon Steel Corp Surface form detecting method
JPS5648029A (en) * 1979-09-26 1981-05-01 Toshiba Corp Electron gun

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5211056A (en) * 1975-07-16 1977-01-27 Nippon Steel Corp Surface form detecting method
JPS5648029A (en) * 1979-09-26 1981-05-01 Toshiba Corp Electron gun

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57196445A (en) * 1981-05-26 1982-12-02 Ibm Forming electron beam generator
US4468586A (en) * 1981-05-26 1984-08-28 International Business Machines Corporation Shaped electron emission from single crystal lanthanum hexaboride with intensity distribution
US4486684A (en) * 1981-05-26 1984-12-04 International Business Machines Corporation Single crystal lanthanum hexaboride electron beam emitter having high brightness
JPH0158817B2 (en) * 1981-05-26 1989-12-13 Intaanashonaru Bijinesu Mashiinzu Corp
JP2005228741A (en) * 2004-02-10 2005-08-25 Nuflare Technology Inc High-luminance thermionic cathode
JP2019114340A (en) * 2017-12-21 2019-07-11 株式会社ニューフレアテクノロジー Cathode
WO2022064557A1 (en) * 2020-09-23 2022-03-31 株式会社日立ハイテク Electron source, method for manufacturing same, and electron beam device in which same is used

Also Published As

Publication number Publication date
JPH0128450B2 (en) 1989-06-02

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