GB1575498A - Method of fabricating bias field magnets for magnetic bubble devices and the product produced thereby - Google Patents
Method of fabricating bias field magnets for magnetic bubble devices and the product produced thereby Download PDFInfo
- Publication number
- GB1575498A GB1575498A GB1306178A GB1306178A GB1575498A GB 1575498 A GB1575498 A GB 1575498A GB 1306178 A GB1306178 A GB 1306178A GB 1306178 A GB1306178 A GB 1306178A GB 1575498 A GB1575498 A GB 1575498A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ferrite
- magnetic
- layer
- soft
- hard
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000010410 layer Substances 0.000 claims description 90
- 229910001035 Soft ferrite Inorganic materials 0.000 claims description 47
- 229910001047 Hard ferrite Inorganic materials 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 19
- 239000012790 adhesive layer Substances 0.000 claims description 15
- 229910000889 permalloy Inorganic materials 0.000 claims description 14
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 7
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims description 5
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 description 14
- 239000002223 garnet Substances 0.000 description 7
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- 230000005381 magnetic domain Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 235000012431 wafers Nutrition 0.000 description 5
- FERIUCNNQQJTOY-UHFFFAOYSA-M Butyrate Chemical compound CCCC([O-])=O FERIUCNNQQJTOY-UHFFFAOYSA-M 0.000 description 4
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Natural products CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910002771 BaFe12O19 Inorganic materials 0.000 description 1
- -1 Foe203 Chemical compound 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 229940093474 manganese carbonate Drugs 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
- G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
- G11C19/085—Generating magnetic fields therefor, e.g. uniform magnetic field for magnetic domain stabilisation
-
- 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
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/18—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being compounds
- H01F10/20—Ferrites
-
- 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
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/3222—Exchange coupled hard/soft multilayers, e.g. CoPt/Co or NiFe/CoSm
-
- 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
- H01F41/16—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 the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
- Magnetic Heads (AREA)
- Thin Magnetic Films (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79257777A | 1977-05-02 | 1977-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1575498A true GB1575498A (en) | 1980-09-24 |
Family
ID=25157374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1306178A Expired GB1575498A (en) | 1977-05-02 | 1978-04-04 | Method of fabricating bias field magnets for magnetic bubble devices and the product produced thereby |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS53135500A (enrdf_load_stackoverflow) |
| BR (1) | BR7802417A (enrdf_load_stackoverflow) |
| DE (1) | DE2817983A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2389968B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1575498A (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2142781A (en) * | 1983-07-04 | 1985-01-23 | Secr Defence | Switchable magnet assembly for use at sea |
| EP1353140A3 (de) * | 2002-04-12 | 2004-08-25 | Valeo Schalter und Sensoren GmbH | Winkelmesssensor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5867006A (ja) * | 1981-10-19 | 1983-04-21 | Yoshifumi Sakurai | 積層垂直磁化膜 |
| DE3634198A1 (de) * | 1986-10-08 | 1988-04-21 | Peters W Maschf | Querschneider |
| DE102006008122B4 (de) * | 2006-02-20 | 2008-05-08 | Barlog Plastics Gmbh | Magnetkörper und Verfahren zu dessen Herstellung |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3024392A (en) * | 1954-08-27 | 1962-03-06 | Baermann Max | Process for the manufacture of plastic bound permanent magnets |
| DE2231591C3 (de) * | 1972-06-28 | 1979-08-09 | Max 5060 Bergisch Gladbach Baermann | Ringscheibenförmiger Dauermagnet für ein magnetisches Lager, vorzugsweise für Elektrizitätszähler, und daraus aufgebautes dauermagnetisches Lager |
| JPS5425309B2 (enrdf_load_stackoverflow) * | 1972-07-14 | 1979-08-27 | ||
| JPS4935898A (enrdf_load_stackoverflow) * | 1972-08-03 | 1974-04-03 | ||
| US3931618A (en) * | 1973-11-14 | 1976-01-06 | Hewlett-Packard Company | Housing structure and magnetic biasing for bubble memories |
| CA1054837A (en) * | 1973-12-12 | 1979-05-22 | Xerox Corporation | Spherical, void-free particle formation in spray-dried ferrites |
| US3927397A (en) * | 1974-05-02 | 1975-12-16 | Honeywell Inf Systems | Bias field apparatus for magnetic domain memory device |
-
1977
- 1977-12-22 FR FR7738899A patent/FR2389968B1/fr not_active Expired
-
1978
- 1978-04-04 GB GB1306178A patent/GB1575498A/en not_active Expired
- 1978-04-18 JP JP4620478A patent/JPS53135500A/ja active Pending
- 1978-04-18 BR BR7802417A patent/BR7802417A/pt unknown
- 1978-04-24 DE DE19782817983 patent/DE2817983A1/de not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2142781A (en) * | 1983-07-04 | 1985-01-23 | Secr Defence | Switchable magnet assembly for use at sea |
| US4676168A (en) * | 1983-07-04 | 1987-06-30 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Magnetic assemblies for minesweeping or ship degaussing |
| EP1353140A3 (de) * | 2002-04-12 | 2004-08-25 | Valeo Schalter und Sensoren GmbH | Winkelmesssensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53135500A (en) | 1978-11-27 |
| DE2817983A1 (de) | 1978-11-09 |
| FR2389968B1 (enrdf_load_stackoverflow) | 1983-02-04 |
| FR2389968A1 (enrdf_load_stackoverflow) | 1978-12-01 |
| BR7802417A (pt) | 1979-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930404 |