GB1099493A - Method for the construction of ferrite memory stores - Google Patents

Method for the construction of ferrite memory stores

Info

Publication number
GB1099493A
GB1099493A GB15052/64A GB1505264A GB1099493A GB 1099493 A GB1099493 A GB 1099493A GB 15052/64 A GB15052/64 A GB 15052/64A GB 1505264 A GB1505264 A GB 1505264A GB 1099493 A GB1099493 A GB 1099493A
Authority
GB
United Kingdom
Prior art keywords
wires
coated
ferrite
particles
crossover
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
GB15052/64A
Inventor
Anthony Howard Collins
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB15052/64A priority Critical patent/GB1099493A/en
Priority to US446723A priority patent/US3408279A/en
Priority to NL6504583A priority patent/NL6504583A/xx
Publication of GB1099493A publication Critical patent/GB1099493A/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
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/02—Electrophoretic coating characterised by the process with inorganic material

Abstract

A ferrite memory store is constructed by immersing a grid network of electrically conductive wires in a bath containing a liquid suspension of ferrite particles, the wires being arranged to avoid contact at their crossover points, applying a voltage between the wires and an immersed electrode so as to electro-phoretically deposit the ferrite particles until they coalesce around the crossover regions to form a continuous coating around them, and sintering the deposits, the material of the wires being such as will withstand the sintering temperature. The wires may be held in jigs with their crossover points out of contact and the ferrite particles deposited on them or lengths of wire may be electro-phoretically coated with the particles sintered sufficiently to allow handling of the coated wires, assembled into grids and further sintered to cause coalescence of the particles at the crossover points. Further electro-deposition of particles may be effected after the grid network has been constructed from the pre-coated wire. If deposition of ferrite between the wires at the crossover points is desired, the wires may be first coated with an insulating material such as crystalline alumina before forming the network. Alternatively the store may be formed of flat strips coated on their flat sides with non-porous insulating material at least at the points of crossover and assembled with the flat sides facing one another. The dispersion medium has a high resistivity and may be pure water, alcohols, ketones, esters or hydrocarbons. As described the wires are of Pt or Pt alloy and are coated cathodically from an ethanol dispersion of Mn-Mg ferrite particles of size about 1 micron or less together with shellac and crystalline FeCl3. Prior to the ferrite deposition, the wire may be coated with graphite which is oxidized away during sintering. The ferrite particles are sintered by heating in air at 1360 DEG C. for 20 hours, cooling to 1100 DEG C., heating in a nitrogen atmosphere at 1100 DEG C. for 2 hours and then cooling. Heating may be effected by passing current through the wires. If the jig as well has to be heated it may be made of a ceramic such as pyrophyllite.
GB15052/64A 1964-04-11 1964-04-11 Method for the construction of ferrite memory stores Expired GB1099493A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB15052/64A GB1099493A (en) 1964-04-11 1964-04-11 Method for the construction of ferrite memory stores
US446723A US3408279A (en) 1964-04-11 1965-04-08 Method for the construction of ferrite memory stores utilizing electrophoretic deposition
NL6504583A NL6504583A (en) 1964-04-11 1965-04-09

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB15052/64A GB1099493A (en) 1964-04-11 1964-04-11 Method for the construction of ferrite memory stores
GB1265465 1965-03-25

Publications (1)

Publication Number Publication Date
GB1099493A true GB1099493A (en) 1968-01-17

Family

ID=26249173

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15052/64A Expired GB1099493A (en) 1964-04-11 1964-04-11 Method for the construction of ferrite memory stores

Country Status (3)

Country Link
US (1) US3408279A (en)
GB (1) GB1099493A (en)
NL (1) NL6504583A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117795A (en) * 1982-04-06 1983-10-19 Standard Telephones Cables Ltd Fabricating capacitors; forming ceramic films
GB2194552A (en) * 1986-09-01 1988-03-09 Baj Ltd Joining by electrolytic or electroless deposition

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906682A (en) * 1954-09-09 1959-09-29 Vitro Corp Of America Information storage systems and methods for producing same
NL235768A (en) * 1958-02-06
NL243931A (en) * 1958-10-01
US3047423A (en) * 1958-12-17 1962-07-31 Ibm Isotropic thin magnetic film
US3100295A (en) * 1960-01-25 1963-08-06 Telefunken Gmbh Method of making magnetic matrices and resulting article

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117795A (en) * 1982-04-06 1983-10-19 Standard Telephones Cables Ltd Fabricating capacitors; forming ceramic films
GB2194552A (en) * 1986-09-01 1988-03-09 Baj Ltd Joining by electrolytic or electroless deposition

Also Published As

Publication number Publication date
NL6504583A (en) 1965-10-12
US3408279A (en) 1968-10-29

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