JPS57151142A - Production method of electron tube cathode - Google Patents

Production method of electron tube cathode

Info

Publication number
JPS57151142A
JPS57151142A JP3573081A JP3573081A JPS57151142A JP S57151142 A JPS57151142 A JP S57151142A JP 3573081 A JP3573081 A JP 3573081A JP 3573081 A JP3573081 A JP 3573081A JP S57151142 A JPS57151142 A JP S57151142A
Authority
JP
Japan
Prior art keywords
metal
filler metal
cathode cylinder
emboss section
molybdenum
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
JP3573081A
Other languages
Japanese (ja)
Inventor
Kenichi Tsujikawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3573081A priority Critical patent/JPS57151142A/en
Publication of JPS57151142A publication Critical patent/JPS57151142A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

PURPOSE:To improve the brazing strength by providing an emboss section at the tip of a metal supporter, attaching this emboss section to a cathode cylinder with a filler metal enclosed in it, and applying a laser beam from outside to melt the filler metal and braze them together. CONSTITUTION:A porous tungsten electron emission layer a is supported by a molybdenum sleeve b to form a cathode cylinder 1. Meanwhile, a emboss section is provided at the tip 4 of a metal supporter 20 made of a heat-resisting metal, e.g., tantalum, niobium, or molybdenum, and a mud-like filler metal made by kneading a molybdenum-ruthenium filler metal and binder together is enclosed in the emboss section 4. After the emboss section 4 is lghtly and tentatively welded to the side of the cathode cylinder 1 by a resistance welding method, a laser beam 6 is applied within an atmosphere of an inactive gas, e.g., nitrogen, argon, etc., to melt the filler metal and braze the cathode cylinder 1 and the metal supporter 20 together. Accordingly, the brazing strength is improved, and flaking troubles are diminished.
JP3573081A 1981-03-12 1981-03-12 Production method of electron tube cathode Pending JPS57151142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3573081A JPS57151142A (en) 1981-03-12 1981-03-12 Production method of electron tube cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3573081A JPS57151142A (en) 1981-03-12 1981-03-12 Production method of electron tube cathode

Publications (1)

Publication Number Publication Date
JPS57151142A true JPS57151142A (en) 1982-09-18

Family

ID=12449952

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3573081A Pending JPS57151142A (en) 1981-03-12 1981-03-12 Production method of electron tube cathode

Country Status (1)

Country Link
JP (1) JPS57151142A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100259421B1 (en) * 1996-11-12 2000-06-15 구자홍 Structure of electrode for crt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100259421B1 (en) * 1996-11-12 2000-06-15 구자홍 Structure of electrode for crt

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