GB950401A - The process of fabricating magnetic circuit devices - Google Patents

The process of fabricating magnetic circuit devices

Info

Publication number
GB950401A
GB950401A GB42082/62A GB4208262A GB950401A GB 950401 A GB950401 A GB 950401A GB 42082/62 A GB42082/62 A GB 42082/62A GB 4208262 A GB4208262 A GB 4208262A GB 950401 A GB950401 A GB 950401A
Authority
GB
United Kingdom
Prior art keywords
copper
wire
plating
acid
coating
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
Application number
GB42082/62A
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR Corp
National Cash Register Co
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 NCR Corp, National Cash Register Co filed Critical NCR Corp
Publication of GB950401A publication Critical patent/GB950401A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/615—Microstructure of the layers, e.g. mixed structure
    • C25D5/617—Crystalline layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/26—Thin magnetic films, e.g. of one-domain structure characterised by the substrate or intermediate layers
    • H01F10/28—Thin magnetic films, e.g. of one-domain structure characterised by the substrate or intermediate layers characterised by the composition of the substrate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S205/00—Electrolysis: processes, compositions used therein, and methods of preparing the compositions
    • Y10S205/922—Electrolytic coating of magnetic storage medium, other than selected area coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/934—Electrical process
    • Y10S428/935—Electroplating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12431—Foil or filament smaller than 6 mils
    • Y10T428/12438—Composite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12903—Cu-base component
    • Y10T428/1291—Next to Co-, Cu-, or Ni-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12903—Cu-base component
    • Y10T428/12917—Next to Fe-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12986—Adjacent functionally defined components

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Power Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

A magnetic storage element is made by electro-depositing copper as a fine grain random orientated coating on phosphor-bronze or beryllium copper substrate, preferably in the form of wire, and plating a ferromagnetic coating on the copper, preferably Fe/Ni alloy having a square hysteresis loop. The wire 2-50 mils thick is preferably cathodically etched in alkali solution, treated with acid and washed before plating in an acid copper sulphate bath at 227 A.S.F. for one minute. The grain size of copper so plated is 0.1-1 m . A plating bath containing FeCl3, NiCl2, ammonium chloride and citrate, and a trace of ammonium hepta molybdate is used at pH 8.6, temperature 90 DEG C. Twistor type devices may be made, when the wire is drawn continuously at constant speed and minimum tension, and centrally disposed in a helical anode of molybdenum wire. Specification 896,263 is referred to.
GB42082/62A 1961-12-12 1962-11-07 The process of fabricating magnetic circuit devices Expired GB950401A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15888561A 1961-12-12 1961-12-12
US581440A US3330631A (en) 1961-12-12 1966-09-23 Magnetic data storage devices

Publications (1)

Publication Number Publication Date
GB950401A true GB950401A (en) 1964-02-26

Family

ID=26855476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42082/62A Expired GB950401A (en) 1961-12-12 1962-11-07 The process of fabricating magnetic circuit devices

Country Status (5)

Country Link
US (1) US3330631A (en)
CH (1) CH405425A (en)
DE (1) DE1193552B (en)
GB (1) GB950401A (en)
NL (1) NL286609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176471A1 (en) * 1972-03-20 1973-11-02 Honeywell Bull Soc Ind Treating thin magnetic film supports - by copper electroplating, for memory elements

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540988A (en) * 1963-03-11 1970-11-17 Bunker Ramo Coating method
US3411892A (en) * 1963-11-28 1968-11-19 Nippon Electric Co Ferromagnetic thin film memory element
US3880602A (en) * 1967-07-28 1975-04-29 Centre Nat Rech Scient Thin layer magnetic structures for binary information stores
US3549507A (en) * 1967-08-09 1970-12-22 Honeywell Inc Method of fabricating a plated wire ferromagnetic memory element
US3869355A (en) * 1967-12-08 1975-03-04 Sperry Rand Corp Method for making a magnetic wire of iron and nickel on a copper base
US3753665A (en) * 1970-11-12 1973-08-21 Gen Electric Magnetic film plated wire
US3844909A (en) * 1970-11-12 1974-10-29 Gen Electric Magnetic film plated wire and substrates therefor
JPS5141222B2 (en) * 1972-12-06 1976-11-09
US3973072A (en) * 1973-02-20 1976-08-03 Minnesota Mining And Manufacturing Company Magnetic recording medium having binder-free phosphide coating
US3887338A (en) * 1973-06-29 1975-06-03 Sperry Rand Corp Plated wire memory
EP1633557A4 (en) * 2003-06-05 2010-08-25 Metal Coatings Int Inc Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474038A (en) * 1945-03-03 1949-06-21 Metals & Controls Corp Composite metal
NL243931A (en) * 1958-10-01
NL265014A (en) * 1960-05-19
US3031648A (en) * 1960-05-25 1962-04-24 Ncr Co Magnetic data storage device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176471A1 (en) * 1972-03-20 1973-11-02 Honeywell Bull Soc Ind Treating thin magnetic film supports - by copper electroplating, for memory elements

Also Published As

Publication number Publication date
US3330631A (en) 1967-07-11
DE1193552B (en) 1965-05-26
CH405425A (en) 1966-01-15
NL286609A (en)

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