GB1311330A - Protective coating for thin ferromagnetic films - Google Patents

Protective coating for thin ferromagnetic films

Info

Publication number
GB1311330A
GB1311330A GB3203370A GB3203370A GB1311330A GB 1311330 A GB1311330 A GB 1311330A GB 3203370 A GB3203370 A GB 3203370A GB 3203370 A GB3203370 A GB 3203370A GB 1311330 A GB1311330 A GB 1311330A
Authority
GB
United Kingdom
Prior art keywords
alloy
wire
july
protective coating
deposited
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
GB3203370A
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.)
Bull SA
Original Assignee
Societe Industrielle Honeywell Bull
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 Societe Industrielle Honeywell Bull filed Critical Societe Industrielle Honeywell Bull
Publication of GB1311330A publication Critical patent/GB1311330A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • 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.]
    • Y10T428/12708—Sn-base component
    • Y10T428/12722—Next to Group VIII metal-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
    • Y10T428/12944—Ni-base component

Abstract

1311330 Electro-deposition of Ni-Fe and Ni-Sn on wire SOC INDUSTRIELLE HONEYWELL BULL 1 July 1970 [2 July 1969] 32033/70 Headings C7A and C7B [Also in Division H1] A Ni-Sn alloy layer (29-37% Ni, balance Sn) is electrolytically deposited on a magnetic film (e.g. Fe-Ni alloy) carried by an electrically conductive substrate. The Ni-Sn layer is at least 5000 angtroms thick while being thin enough (e.g. a few microns) to suppress eddy currents in the substrate. In one embodiment, a copper-coated beryllium-copper wire is moved through a tank wherein it is coated electrolytically with a nickeliron alloy (about 18% Fe). The Ni-Sn alloy is the deposited from a bath containing Sn Cl 2 , 2H 2 O, NiCl 2 6H 2 O, NH 4 F, HF and NH 4 OH at pH 2À5 and 55-70‹ C. The wire is used as the cathode and is surrounded by a Ni anode. A 36% Ni alloy is obtained by operating at 65‹C and 26MA/cm<SP>2</SP> with a 1 minute immersion time.
GB3203370A 1969-07-02 1970-07-01 Protective coating for thin ferromagnetic films Expired GB1311330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6922276A FR2051927A5 (en) 1969-07-02 1969-07-02

Publications (1)

Publication Number Publication Date
GB1311330A true GB1311330A (en) 1973-03-28

Family

ID=9036746

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3203370A Expired GB1311330A (en) 1969-07-02 1970-07-01 Protective coating for thin ferromagnetic films

Country Status (5)

Country Link
US (1) US3682604A (en)
DE (1) DE2031446A1 (en)
FR (1) FR2051927A5 (en)
GB (1) GB1311330A (en)
NL (1) NL170679C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884116A (en) * 1971-12-15 1975-05-20 Midwest Chrome Process Company Screw threaded fastening means and like products
JPS5141222B2 (en) * 1972-12-06 1976-11-09
JPS576177B2 (en) * 1974-08-22 1982-02-03
JPS615659Y2 (en) * 1980-01-14 1986-02-20
US4678722A (en) * 1984-11-13 1987-07-07 Uri Cohen Record member with metallic antifriction overcoat
US4923574A (en) * 1984-11-13 1990-05-08 Uri Cohen Method for making a record member with a metallic antifriction overcoat

Also Published As

Publication number Publication date
FR2051927A5 (en) 1971-04-09
NL170679B (en) 1982-07-01
US3682604A (en) 1972-08-08
NL7008985A (en) 1971-01-05
NL170679C (en) 1982-12-01
DE2031446A1 (en) 1971-01-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years