GB1199421A - Method of Producing Thin Ferromagnetic Layers. - Google Patents

Method of Producing Thin Ferromagnetic Layers.

Info

Publication number
GB1199421A
GB1199421A GB53596/67A GB5359667A GB1199421A GB 1199421 A GB1199421 A GB 1199421A GB 53596/67 A GB53596/67 A GB 53596/67A GB 5359667 A GB5359667 A GB 5359667A GB 1199421 A GB1199421 A GB 1199421A
Authority
GB
United Kingdom
Prior art keywords
nickel
glass
deposited
deposition
electrolytically
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
GB53596/67A
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.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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 Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1199421A publication Critical patent/GB1199421A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/24—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids
    • H01F41/26—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids using electric currents, e.g. electroplating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
    • 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

Abstract

1,199,421. Electrolytic deposition of ferromagnetic layers. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. Nov. 24, 1967 [Nov. 26, 1966], No.53596/67. Heading C7B. Thin ferromagnetic layers of ferro nickel alloy are electrolytically deposited from a bath containing a selenuim compound in addition to iron and nickel salts, the pH of the bath being maintained below 3. The selenium is preferably present in quadrivalent form, e.g. as selenium dioxide, selenous acid or sodium selenite. During deposition the surface upon which the layer is to be deposited may be exposed to a powerful homogeneous magnetic field, the lines of force extending parallel to said surface. Either the workpiece potential or the current density at the workpiece is preferably held constant, at least in stages. In the example given the bath contained nickel sulphate, ammonium ferrous sulphate, boric acid, sodium chloride, saccharine, sodium lauryl sulphate and sodium selenate, the anode was formed of platinum, nickel or nickel and iron, and the cathode upon which the film was deposited was formed by a glass wafer upon which first chromium and then gold had been vapour deposited. Alternatively the substrate may be produced by sensitizing a glass plate in a solution of tin chloride, followed by activation in a solution of palladium chloride, electroless deposition of copper, electrolytic deposition of copper and coating with a glass fibre laminated epoxy resin foil. The resulting foil was removed from the glass and the surface which had faced the glass was coated with gold, electrolytically or electrolessly, which surface then formed the deposition surface for the ferromagnetic alloy film. Polished metals or chemically or electrolytically coated plastics or glasses may be used as the substrate.
GB53596/67A 1966-11-26 1967-11-24 Method of Producing Thin Ferromagnetic Layers. Expired GB1199421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0032595 1966-11-26

Publications (1)

Publication Number Publication Date
GB1199421A true GB1199421A (en) 1970-07-22

Family

ID=7557148

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53596/67A Expired GB1199421A (en) 1966-11-26 1967-11-24 Method of Producing Thin Ferromagnetic Layers.

Country Status (3)

Country Link
US (1) US3594290A (en)
DE (1) DE1249630B (en)
GB (1) GB1199421A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938125A (en) * 1974-02-20 1976-02-10 Minnesota Mining And Manufacturing Company Antipilferage system and marker therefor

Also Published As

Publication number Publication date
DE1249630B (en) 1967-09-07
US3594290A (en) 1971-07-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees