JPS56121257A - Manufacture of cathode-ray tube - Google Patents

Manufacture of cathode-ray tube

Info

Publication number
JPS56121257A
JPS56121257A JP2502680A JP2502680A JPS56121257A JP S56121257 A JPS56121257 A JP S56121257A JP 2502680 A JP2502680 A JP 2502680A JP 2502680 A JP2502680 A JP 2502680A JP S56121257 A JPS56121257 A JP S56121257A
Authority
JP
Japan
Prior art keywords
shadow mask
metal part
film
steam
nitriding treatment
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
JP2502680A
Other languages
Japanese (ja)
Inventor
Tetsuya Watanabe
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2502680A priority Critical patent/JPS56121257A/en
Publication of JPS56121257A publication Critical patent/JPS56121257A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
    • 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
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
    • H01J9/146—Surface treatment, e.g. blackening, coating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

PURPOSE:To improve hardness and heat radiation effect of a metal part, by applying steam nitriding treatment to surfaces of the metal part with an influence to the progress of an electron beam and forming a porous oxidized film in the outermost layer and a nitrogen infiltrated layer below said film. CONSTITUTION:A metal part, for instance, shadow mask 3 is placed on a treatment jig 13 and set in a steam nitriding treatment furnace 14. To surfaces of the shadow mask 3, steam nitriding treatment is applied while controlling a power source 17 with a temperature controller 16. Then the shadow mask 3 is taken out to the outside from the furnace. A porous oxidized film in the outermost layer of the surface in the taken out shadow mask 3 and a nitrogen infiltrated layer below said film enriched by nitrogen and oxygen are formed respectively.
JP2502680A 1980-02-28 1980-02-28 Manufacture of cathode-ray tube Pending JPS56121257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2502680A JPS56121257A (en) 1980-02-28 1980-02-28 Manufacture of cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2502680A JPS56121257A (en) 1980-02-28 1980-02-28 Manufacture of cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS56121257A true JPS56121257A (en) 1981-09-24

Family

ID=12154394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2502680A Pending JPS56121257A (en) 1980-02-28 1980-02-28 Manufacture of cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS56121257A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522020A1 (en) * 1982-02-22 1983-08-26 Rca Corp PROCESS FOR DARKENING SURFACES OF METAL ELEMENTS, SUCH AS IN PARTICULAR PERFORATED MASKS OF COLOR IMAGE TUBES
US6247988B1 (en) 1998-01-22 2001-06-19 Samsung Display Devices Co., Ltd. Shadow mask for cathode ray tube and method of manufacturing same
US6252343B1 (en) 1998-01-22 2001-06-26 Samsung Display Divices Co., Ltd Shadow mask for cathode ray tube and method of manufacturing same
US6373177B1 (en) 1997-12-01 2002-04-16 Samsung Display Devices Co., Ltd. Shadow mask for cathode ray tube and method of manufacturing same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522020A1 (en) * 1982-02-22 1983-08-26 Rca Corp PROCESS FOR DARKENING SURFACES OF METAL ELEMENTS, SUCH AS IN PARTICULAR PERFORATED MASKS OF COLOR IMAGE TUBES
US6373177B1 (en) 1997-12-01 2002-04-16 Samsung Display Devices Co., Ltd. Shadow mask for cathode ray tube and method of manufacturing same
US6247988B1 (en) 1998-01-22 2001-06-19 Samsung Display Devices Co., Ltd. Shadow mask for cathode ray tube and method of manufacturing same
US6252343B1 (en) 1998-01-22 2001-06-26 Samsung Display Divices Co., Ltd Shadow mask for cathode ray tube and method of manufacturing same

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