GB986024A - Methods of constructing an array of magnetic elements - Google Patents

Methods of constructing an array of magnetic elements

Info

Publication number
GB986024A
GB986024A GB4312762A GB4312762A GB986024A GB 986024 A GB986024 A GB 986024A GB 4312762 A GB4312762 A GB 4312762A GB 4312762 A GB4312762 A GB 4312762A GB 986024 A GB986024 A GB 986024A
Authority
GB
United Kingdom
Prior art keywords
conductors
ferrite
sheets
sheet
sintering
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
GB4312762A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB986024A publication Critical patent/GB986024A/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
    • H01F10/06—Thin magnetic films, e.g. of one-domain structure characterised by the coupling or physical contact with connecting or interacting conductors
    • 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
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • H01F1/0315—Ferrites

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

986,024. Magnetic structures; printed circuits. RADIO CORPORATION OF AMERICA. Nov. 14, 1962 [Nov. 30, 1961], No. 43127/62. Headings H1H and H1R. [Also in Division H3] A magnetic storage array (see Division H3) is constructed by forming sheets of green ferrite by doctor blading a ferrite slurry on a support, drying and peeling off the resulting flexible sheets, depositing different patterns of conductors on to different surfaces of the sheets, assembling the sheets into a laminated stack, and applying heat to produce a sintered ferrite sheet having conductors embedded therein. The ferrite slurry comprises 65 parts (by weight) of a calcinated ferrite made of zinc, magnesium and manganese oxides, 13 parts of an organic binder and 52 parts of a methyl ethyl ketone solvent. Before sintering, the stack is formed into a laminated green ferrite sheet by applying pressure of about 900 lb. per square inch and heating for about 10 minutes at 120‹ C. A sintering temperature of about 1200‹ C. is used, the conductor being formed of higher melting point material such as palladium, rhodium or platinum so as to be unaffected by the sintering process. After sintering, the resulting sheet is air quenched at room temperature or annealed in nitrogen at 1100‹ C. for 1 hour. A typical arrangement of deposited conductors 12, 14, 18 and 22 on green ferrite sheets 16, 20, 26 is shown in Fig. 2, the upper conductors being covered by a plain green ferrite sheet 10. Other conductor dispositions are described, and in one embodiment conductors are deposited on opposite sides of a single sheet and only partially covered by using plain green ferrite strips, Figs. 7-9 (not shown). The conductors are formed by vacuum deposition through a mask, followed by electrolytic deposition to a substantial depth. To enable the conductors to withstand ferrite shrinkage during the sintering process, the conductors are formed with a coarse or spongy texture which is imparted by using a relatively high electroplating current such as 1 to 5 amperes per square foot of conductor surface.
GB4312762A 1961-11-30 1962-11-14 Methods of constructing an array of magnetic elements Expired GB986024A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US15592661A 1961-11-30 1961-11-30
US15594461A 1961-11-30 1961-11-30
US15592761A 1961-11-30 1961-11-30

Publications (1)

Publication Number Publication Date
GB986024A true GB986024A (en) 1965-03-17

Family

ID=27387775

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4312762A Expired GB986024A (en) 1961-11-30 1962-11-14 Methods of constructing an array of magnetic elements

Country Status (1)

Country Link
GB (1) GB986024A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312961A (en) * 1963-08-22 1967-04-04 Rca Corp Coincident current magnetic plate memory
CN113444942A (en) * 2021-06-28 2021-09-28 包头稀土研究院 Ferromanganese-based magnetic composite material and design method and manufacturing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312961A (en) * 1963-08-22 1967-04-04 Rca Corp Coincident current magnetic plate memory
CN113444942A (en) * 2021-06-28 2021-09-28 包头稀土研究院 Ferromanganese-based magnetic composite material and design method and manufacturing method thereof

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