JPS5219061A - Production method of needle cathode - Google Patents

Production method of needle cathode

Info

Publication number
JPS5219061A
JPS5219061A JP9426375A JP9426375A JPS5219061A JP S5219061 A JPS5219061 A JP S5219061A JP 9426375 A JP9426375 A JP 9426375A JP 9426375 A JP9426375 A JP 9426375A JP S5219061 A JPS5219061 A JP S5219061A
Authority
JP
Japan
Prior art keywords
cathode
acicular
production method
less
curvature radius
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.)
Pending
Application number
JP9426375A
Other languages
Japanese (ja)
Inventor
Masaaki Futamoto
Toshiyuki Aida
Ushio Kawabe
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9426375A priority Critical patent/JPS5219061A/en
Publication of JPS5219061A publication Critical patent/JPS5219061A/en
Pending legal-status Critical Current

Links

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Cold Cathode And The Manufacture (AREA)

Abstract

PURPOSE: A method with which the production of acicular cathode becomes easy by producing the acicular cathod which possesses the smooth surface of which frontedge curvature radius is less than several micron when it is the thermionic emission cathode and the acicular cathode with pointed shape of which front-edge curvature radius is less than a thousand Angstrom when it is the electrostatic radiation cathode.
COPYRIGHT: (C)1977,JPO&Japio
JP9426375A 1975-08-04 1975-08-04 Production method of needle cathode Pending JPS5219061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9426375A JPS5219061A (en) 1975-08-04 1975-08-04 Production method of needle cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9426375A JPS5219061A (en) 1975-08-04 1975-08-04 Production method of needle cathode

Publications (1)

Publication Number Publication Date
JPS5219061A true JPS5219061A (en) 1977-01-14

Family

ID=14105386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9426375A Pending JPS5219061A (en) 1975-08-04 1975-08-04 Production method of needle cathode

Country Status (1)

Country Link
JP (1) JPS5219061A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455149A (en) * 1977-10-11 1979-05-02 Nec Corp Circulator
JPS54118152A (en) * 1978-03-07 1979-09-13 Nec Corp Strip line circulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455149A (en) * 1977-10-11 1979-05-02 Nec Corp Circulator
JPS54118152A (en) * 1978-03-07 1979-09-13 Nec Corp Strip line circulator

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