FR2359195A1 - Produit d'attaque electrolytique de ferrites et un procede de fabrication de tete magnetique - Google Patents

Produit d'attaque electrolytique de ferrites et un procede de fabrication de tete magnetique

Info

Publication number
FR2359195A1
FR2359195A1 FR7722660A FR7722660A FR2359195A1 FR 2359195 A1 FR2359195 A1 FR 2359195A1 FR 7722660 A FR7722660 A FR 7722660A FR 7722660 A FR7722660 A FR 7722660A FR 2359195 A1 FR2359195 A1 FR 2359195A1
Authority
FR
France
Prior art keywords
etching
etchant
magnetic head
water
sulphuric acid
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.)
Granted
Application number
FR7722660A
Other languages
English (en)
French (fr)
Other versions
FR2359195B1 (enrdf_load_stackoverflow
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of FR2359195A1 publication Critical patent/FR2359195A1/fr
Application granted granted Critical
Publication of FR2359195B1 publication Critical patent/FR2359195B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles
    • G11B5/1335—Assembling or shaping of elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Heads (AREA)
  • ing And Chemical Polishing (AREA)
FR7722660A 1976-07-23 1977-07-22 Produit d'attaque electrolytique de ferrites et un procede de fabrication de tete magnetique Granted FR2359195A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8859076A JPS5312740A (en) 1976-07-23 1976-07-23 Liquid for electrolytically etching ferrite

Publications (2)

Publication Number Publication Date
FR2359195A1 true FR2359195A1 (fr) 1978-02-17
FR2359195B1 FR2359195B1 (enrdf_load_stackoverflow) 1981-03-06

Family

ID=13947039

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7722660A Granted FR2359195A1 (fr) 1976-07-23 1977-07-22 Produit d'attaque electrolytique de ferrites et un procede de fabrication de tete magnetique

Country Status (3)

Country Link
JP (1) JPS5312740A (enrdf_load_stackoverflow)
DE (1) DE2733304C2 (enrdf_load_stackoverflow)
FR (1) FR2359195A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428690A1 (fr) * 1977-06-14 1980-01-11 Sony Corp Procede d'attaque electrochimique d'un element en ferrite

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59207415A (ja) * 1983-05-11 1984-11-24 Hitachi Ltd 複合型磁気ヘツドおよびその製造方法
DE3319437C2 (de) * 1983-05-28 1985-04-04 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Magnetkopf und Verfahren zu seiner Herstellung
SE9101469D0 (sv) * 1991-05-15 1991-05-15 Sandvik Ab Etsmetod
SE511209C2 (sv) * 1994-12-12 1999-08-23 Sandvik Ab Metod för att erhålla väldefinierade eggradier på skär med elektropoleringsteknik

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479738A (en) * 1967-05-23 1969-11-25 Rca Corp Magnetic heads

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428690A1 (fr) * 1977-06-14 1980-01-11 Sony Corp Procede d'attaque electrochimique d'un element en ferrite

Also Published As

Publication number Publication date
JPS5312740A (en) 1978-02-04
JPS5440381B2 (enrdf_load_stackoverflow) 1979-12-03
DE2733304A1 (de) 1978-01-26
FR2359195B1 (enrdf_load_stackoverflow) 1981-03-06
DE2733304C2 (de) 1984-12-20

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Legal Events

Date Code Title Description
ST Notification of lapse