GB1414353A - Apparatus for electrolytically plating ferromagnetic alloy films - Google Patents

Apparatus for electrolytically plating ferromagnetic alloy films

Info

Publication number
GB1414353A
GB1414353A GB4147573A GB4147573A GB1414353A GB 1414353 A GB1414353 A GB 1414353A GB 4147573 A GB4147573 A GB 4147573A GB 4147573 A GB4147573 A GB 4147573A GB 1414353 A GB1414353 A GB 1414353A
Authority
GB
United Kingdom
Prior art keywords
plating
changes
signal
film
control
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
GB4147573A
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.)
IBM United Kingdom Ltd
Original Assignee
IBM United Kingdom 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 IBM United Kingdom Ltd filed Critical IBM United Kingdom Ltd
Priority to GB4147573A priority Critical patent/GB1414353A/en
Priority to FR7425790A priority patent/FR2245784B1/fr
Priority to DE2441422A priority patent/DE2441422A1/en
Priority to JP49100608A priority patent/JPS5051429A/ja
Publication of GB1414353A publication Critical patent/GB1414353A/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
    • 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
    • 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
    • C25D5/007—Electroplating using magnetic fields, e.g. magnets
    • C25D5/009—Deposition of ferromagnetic material
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/001—Magnets
    • 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

Abstract

1414353 Controlling electro-plating of magnetic films I B M UNITED KINGDOM Ltd 4 Sept 1973 41475/73 Heading C7B [Also in Division G3] In electro-plating a ferromagnetic alloy film, e.g. of Fe-Ni, the current supply is varied to control the desired alloy composition by magnetizing at least a portion of the film to saturation during plating, and directing a beam of polarized light for reflection off the magnetized area, the reflected beam being intercepted and analyzed for changes in polarization due to the Kerr magnetooptic effect, a signal derived from such detected changes being used to control automatically the plating current. An alternating magnetic field may be used. As described an He-Ne laser directs plane polarized light through a window 71 of glass cell 60, the reflected light being intercepted by an analyzer set 2 degrees off extinction and passed to a photo-multiplier. The resulting signal has A.C. and D.C. components which vary respectively according to the changes in polarization of the light and reflectivity of the plated film. These voltage components are separated and amplified, the D.C. component being divided into the A.C. component to compensate for reflectivity changes. The final signal is applied to a differential amplifier which compares it with a desired fixed or variable signal and the resultant signal is used to control the plating current. The cell used may have a sliding plastics base 65 into which the substrate 68, e.g. a metallized glass slide, is held in a recess. Rod 74 is spring-loaded and provides electrical contact with the substrate. A Pt spiral anode 74 is used. Provision is made for a calomel electrode 76 which samples electrolyte via capillary 77 for calibration purposes, of which details are described. The bath disclosed comprises NiCl 2 , FeSO 4 , H 3 BO 3 and NaSCN in aqueous solution, the latter salt controlling the proportions of Fe and Ni in the alloy deposited.
GB4147573A 1973-09-04 1973-09-04 Apparatus for electrolytically plating ferromagnetic alloy films Expired GB1414353A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB4147573A GB1414353A (en) 1973-09-04 1973-09-04 Apparatus for electrolytically plating ferromagnetic alloy films
FR7425790A FR2245784B1 (en) 1973-09-04 1974-07-17
DE2441422A DE2441422A1 (en) 1973-09-04 1974-08-29 PLATING DEVICE FOR GROWING UP FILMS OF FERROMAGNETIC ALLOYS
JP49100608A JPS5051429A (en) 1973-09-04 1974-09-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4147573A GB1414353A (en) 1973-09-04 1973-09-04 Apparatus for electrolytically plating ferromagnetic alloy films

Publications (1)

Publication Number Publication Date
GB1414353A true GB1414353A (en) 1975-11-19

Family

ID=10419860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4147573A Expired GB1414353A (en) 1973-09-04 1973-09-04 Apparatus for electrolytically plating ferromagnetic alloy films

Country Status (4)

Country Link
JP (1) JPS5051429A (en)
DE (1) DE2441422A1 (en)
FR (1) FR2245784B1 (en)
GB (1) GB1414353A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4279707A (en) 1978-12-18 1981-07-21 International Business Machines Corporation Electroplating of nickel-iron alloys for uniformity of nickel/iron ratio using a low density plating current
WO1988009400A1 (en) * 1987-05-27 1988-12-01 Electrolytic Zinc Company Of Australasia Limited Controlling processes for the electrolytic recovery of metals
RU2450084C1 (en) * 2010-08-25 2012-05-10 Федеральное государственное образовательное учреждение высшего профессионального образования "Тюменская государственная сельскохозяйственная академия" Electrodiffusion thermal treatment of hollow part from steel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5582793A (en) * 1978-12-18 1980-06-21 Ibm Nickelliron plating method
US4379022A (en) * 1979-05-08 1983-04-05 International Business Machines Corporation Method for maskless chemical machining
US4217183A (en) * 1979-05-08 1980-08-12 International Business Machines Corporation Method for locally enhancing electroplating rates

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4279707A (en) 1978-12-18 1981-07-21 International Business Machines Corporation Electroplating of nickel-iron alloys for uniformity of nickel/iron ratio using a low density plating current
WO1988009400A1 (en) * 1987-05-27 1988-12-01 Electrolytic Zinc Company Of Australasia Limited Controlling processes for the electrolytic recovery of metals
RU2450084C1 (en) * 2010-08-25 2012-05-10 Федеральное государственное образовательное учреждение высшего профессионального образования "Тюменская государственная сельскохозяйственная академия" Electrodiffusion thermal treatment of hollow part from steel

Also Published As

Publication number Publication date
DE2441422A1 (en) 1975-03-13
FR2245784B1 (en) 1976-10-22
FR2245784A1 (en) 1975-04-25
JPS5051429A (en) 1975-05-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee