DE2731924C3 - Verfahren zur Herstellung eines magnetischen Aufzeichnungsbandes sowie ein magnetischer Aufzeichnungsträger gemäß einem solchen Verfahren - Google Patents
Verfahren zur Herstellung eines magnetischen Aufzeichnungsbandes sowie ein magnetischer Aufzeichnungsträger gemäß einem solchen VerfahrenInfo
- Publication number
- DE2731924C3 DE2731924C3 DE2731924A DE2731924A DE2731924C3 DE 2731924 C3 DE2731924 C3 DE 2731924C3 DE 2731924 A DE2731924 A DE 2731924A DE 2731924 A DE2731924 A DE 2731924A DE 2731924 C3 DE2731924 C3 DE 2731924C3
- Authority
- DE
- Germany
- Prior art keywords
- magnetic recording
- layer
- thin
- vacuum
- magnetic
- 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
- 230000005291 magnetic effect Effects 0.000 title claims description 71
- 238000000034 method Methods 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000013078 crystal Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 230000005294 ferromagnetic effect Effects 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 15
- 238000007740 vapor deposition Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 12
- 238000007738 vacuum evaporation Methods 0.000 claims description 12
- 239000012298 atmosphere Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 239000003302 ferromagnetic material Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- 239000010941 cobalt Substances 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000007733 ion plating Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 claims description 2
- 229920006255 plastic film Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 2
- 238000007747 plating Methods 0.000 claims 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 238000007796 conventional method Methods 0.000 claims 1
- 239000002019 doping agent Substances 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 238000001953 recrystallisation Methods 0.000 claims 1
- 238000004544 sputter deposition Methods 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 60
- 238000001704 evaporation Methods 0.000 description 19
- 230000008020 evaporation Effects 0.000 description 16
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 9
- 229910001882 dioxygen Inorganic materials 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 108010083687 Ion Pumps Proteins 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/72—Protective coatings, e.g. anti-static or antifriction
-
- 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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/85—Coating a support with a magnetic layer by vapour deposition
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/928—Magnetic property
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12556—Organic component
- Y10T428/12569—Synthetic resin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12611—Oxide-containing component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12736—Al-base component
- Y10T428/1275—Next to Group VIII or IB metal-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12736—Al-base component
- Y10T428/1275—Next to Group VIII or IB metal-base component
- Y10T428/12757—Fe
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12944—Ni-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/19—Sheets or webs edge spliced or joined
- Y10T428/192—Sheets or webs coplanar
- Y10T428/197—Sheets or webs coplanar with noncoplanar reinforcement
- Y10T428/198—Pile or nap surface sheets connected
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51084829A JPS609325B2 (ja) | 1976-07-15 | 1976-07-15 | 磁性薄膜 |
| JP11527176A JPS5339707A (en) | 1976-09-24 | 1976-09-24 | Magnetic recording medium |
| JP11693276A JPS5342010A (en) | 1976-09-28 | 1976-09-28 | Preparation of magnetic recording medium |
| JP13337876A JPS5358206A (en) | 1976-11-05 | 1976-11-05 | Magnetic recording medium |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2731924A1 DE2731924A1 (de) | 1978-01-19 |
| DE2731924B2 DE2731924B2 (de) | 1980-11-20 |
| DE2731924C3 true DE2731924C3 (de) | 1986-10-23 |
Family
ID=27467016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2731924A Expired DE2731924C3 (de) | 1976-07-15 | 1977-07-14 | Verfahren zur Herstellung eines magnetischen Aufzeichnungsbandes sowie ein magnetischer Aufzeichnungsträger gemäß einem solchen Verfahren |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4239835A (OSRAM) |
| CA (1) | CA1093690A (OSRAM) |
| DE (1) | DE2731924C3 (OSRAM) |
| FR (1) | FR2358722A1 (OSRAM) |
| GB (1) | GB1599161A (OSRAM) |
| NL (1) | NL179688C (OSRAM) |
Families Citing this family (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU531847B2 (en) * | 1979-02-23 | 1983-09-08 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Magnetic recording medium + process for production thereof |
| JPS563428A (en) * | 1979-06-20 | 1981-01-14 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS6033289B2 (ja) * | 1979-07-18 | 1985-08-02 | 松下電器産業株式会社 | 金属薄膜型磁気記録媒体 |
| FR2473209A1 (fr) * | 1980-01-08 | 1981-07-10 | Sagem | Procede pour former une couche de protection sur une couche magnetique et couche magnetique protegee obtenue par ce procede |
| JPS5832767B2 (ja) * | 1980-01-24 | 1983-07-15 | ヤマハ株式会社 | 硬質磁性材料の製法 |
| JPS56134303A (en) * | 1980-03-25 | 1981-10-21 | Matsushita Electric Ind Co Ltd | Signal recording system |
| JPS56140613A (en) * | 1980-04-04 | 1981-11-04 | Tdk Corp | Manufacture of ferromagnetic thin film |
| JPS56143519A (en) * | 1980-04-08 | 1981-11-09 | Tdk Corp | Magnetic recording medium and manufacturing device |
| EP0046269B1 (en) * | 1980-08-18 | 1986-08-13 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording media and process for fabricating the same |
| JPS5798133A (en) * | 1980-12-05 | 1982-06-18 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
| CA1185013A (en) * | 1981-01-14 | 1985-04-02 | Kenji Ohta | Magneto-optic memory medium |
| JPS57143728A (en) * | 1981-02-27 | 1982-09-06 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS57143729A (en) * | 1981-02-27 | 1982-09-06 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS57164432A (en) * | 1981-04-02 | 1982-10-09 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| US4489124A (en) * | 1981-04-06 | 1984-12-18 | Olympus Optical Co | Process for forming thin film, heat treatment process of thin film sheet, and heat treatment apparatus therefor |
| CA1188796A (en) * | 1981-04-14 | 1985-06-11 | Kenji Yazawa | Magnetic recording medium |
| JPS57179952A (en) * | 1981-04-24 | 1982-11-05 | Fuji Photo Film Co Ltd | Method and apparatus for magnetic recording medium |
| JPS57191830A (en) * | 1981-05-22 | 1982-11-25 | Sony Corp | Magnetic recording medium |
| US4419385A (en) * | 1981-09-24 | 1983-12-06 | Hughes Aircraft Company | Low temperature process for depositing an oxide dielectric layer on a conductive surface and multilayer structures formed thereby |
| US4374009A (en) * | 1981-09-28 | 1983-02-15 | Xerox Corporation | Electrochemical post treatment of perpendicular magnetic recording media |
| DE3277337D1 (en) * | 1981-09-28 | 1987-10-22 | Xerox Corp | Post treatment of perpendicular magnetic recording media |
| US4388367A (en) * | 1981-09-28 | 1983-06-14 | Xerox Corporation | Perpendicular magnetic recording medium and fabrication |
| US4405677A (en) * | 1981-09-28 | 1983-09-20 | Xerox Corporation | Post treatment of perpendicular magnetic recording media |
| JPS5883328A (ja) * | 1981-11-12 | 1983-05-19 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
| JPS58111127A (ja) * | 1981-12-24 | 1983-07-02 | Ulvac Corp | 耐摩耗性磁気記録体の製造法 |
| JPS58130443A (ja) * | 1982-01-28 | 1983-08-03 | Fuji Photo Film Co Ltd | 磁気記録媒体の製造方法 |
| JPS5961105A (ja) * | 1982-09-30 | 1984-04-07 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
| JPS5987622A (ja) * | 1982-11-09 | 1984-05-21 | Ulvac Corp | 磁気記録体並にその製造法 |
| EP0122030B1 (en) * | 1983-03-08 | 1987-08-26 | Nihon Shinku Gijutsu Kabushiki Kaisha | A magnetic recording member and a manufacturing method for such a member |
| JPS59171029A (ja) * | 1983-03-18 | 1984-09-27 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
| JPS59178617A (ja) * | 1983-03-30 | 1984-10-09 | Tdk Corp | 磁気記録媒体の製造方法 |
| JPS6082638A (ja) * | 1983-10-07 | 1985-05-10 | Hitachi Ltd | Νｉ−Ｃｏ−Ｆｅの三元系合金薄膜およびその製造方法 |
| JPS60138720A (ja) * | 1983-12-27 | 1985-07-23 | Sharp Corp | 垂直磁気記録媒体 |
| JPS60154323A (ja) * | 1984-01-20 | 1985-08-14 | Sony Corp | 磁気記録媒体 |
| JPH0766507B2 (ja) * | 1984-02-16 | 1995-07-19 | コニカ株式会社 | 磁気記録媒体 |
| CA1235808A (en) * | 1984-03-22 | 1988-04-26 | Tetsuo Oka | Vertical magnetic recording medium and process for preparation thereof |
| US4525759A (en) * | 1984-04-02 | 1985-06-25 | Shipley Company Inc. | Aluminum storage disc |
| US4803130A (en) * | 1984-12-21 | 1989-02-07 | Minnesota Mining And Manufacturing Company | Reactive sputtering process for recording media |
| US4729924A (en) * | 1984-12-21 | 1988-03-08 | Minnesota Mining And Manufacturing Company | Metallic thin film magnetic recording medium having a hard protective layer |
| US4816351A (en) * | 1985-02-26 | 1989-03-28 | Canon Kabushiki Kaisha | Magnetic recording medium |
| JP2662777B2 (ja) * | 1985-04-15 | 1997-10-15 | 日立マクセル株式会社 | 磁気記録媒体およびその製造方法 |
| JPS62208412A (ja) * | 1986-03-07 | 1987-09-12 | Hitachi Ltd | 磁気記録媒体およびその製造方法 |
| EP0265246B1 (en) * | 1986-10-21 | 1994-03-09 | Matsushita Electric Industrial Co., Ltd. | Magnetic iron oxide film and production thereof |
| US4752344A (en) * | 1986-12-22 | 1988-06-21 | International Business Machines Corporation | Magnetic layer and method of manufacture |
| US5400307A (en) * | 1987-08-26 | 1995-03-21 | Sony Corporation | Magneto-optical recording medium with stacked layer structure |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2970075A (en) * | 1958-10-13 | 1961-01-31 | Gen Electric | Cast intermediate or blank and method of preparation |
| US3433721A (en) * | 1960-03-28 | 1969-03-18 | Gen Electric | Method of fabricating thin films |
| US3471271A (en) * | 1965-08-16 | 1969-10-07 | Udylite Corp | Electrodeposition of a micro-cracked corrosion resistant nickel-chromium plate |
| US3520664A (en) * | 1966-11-10 | 1970-07-14 | Ibm | Magnetic thin-film device |
| US3700500A (en) * | 1967-12-04 | 1972-10-24 | Gen Electric | Magnetic films having a predetermined coercivity |
| US3702239A (en) * | 1969-03-17 | 1972-11-07 | Sperry Rand Corp | Magnetic storage medium |
| JPS5041365Y2 (OSRAM) * | 1971-01-08 | 1975-11-25 | ||
| US3857734A (en) * | 1972-05-04 | 1974-12-31 | Honeywell Inc | Manganese bismuth thin films on reactive substrates |
| DE2250481C3 (de) * | 1972-10-14 | 1981-08-27 | Ibm Deutschland Gmbh, 7000 Stuttgart | Verfahren zur Herstellung eines magnetischen Aufzeichnungsträgers |
| US4005698A (en) * | 1974-10-18 | 1977-02-01 | International Business Machines Corporation | Photon energy converter |
| US3996095A (en) * | 1975-04-16 | 1976-12-07 | International Business Machines Corporation | Epitaxial process of forming ferrite, Fe3 O4 and γFe2 O3 thin films on special materials |
| US4024489A (en) * | 1975-11-18 | 1977-05-17 | International Business Machines Corporation | Magnetoresistive sandwich including sensor electrically parallel with electrical shunt and magnetic biasing layers |
| DE2556755C2 (de) * | 1975-12-17 | 1982-04-15 | Ibm Deutschland Gmbh, 7000 Stuttgart | Mehrschichtiger magnetischer Aufzeichnungsträger |
| US4088547A (en) * | 1976-09-01 | 1978-05-09 | Borg-Warner Corporation | Method for producing a coated metal nodular solar heat collector |
-
1977
- 1977-07-07 GB GB28448/77A patent/GB1599161A/en not_active Expired
- 1977-07-12 NL NLAANVRAGE7707769,A patent/NL179688C/xx not_active IP Right Cessation
- 1977-07-13 US US05/815,301 patent/US4239835A/en not_active Expired - Lifetime
- 1977-07-13 FR FR7721635A patent/FR2358722A1/fr active Granted
- 1977-07-14 DE DE2731924A patent/DE2731924C3/de not_active Expired
- 1977-07-15 CA CA282,897A patent/CA1093690A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2731924B2 (de) | 1980-11-20 |
| NL179688B (nl) | 1986-05-16 |
| GB1599161A (en) | 1981-09-30 |
| DE2731924A1 (de) | 1978-01-19 |
| US4239835A (en) | 1980-12-16 |
| CA1093690A (en) | 1981-01-13 |
| FR2358722A1 (fr) | 1978-02-10 |
| FR2358722B1 (OSRAM) | 1981-08-07 |
| NL179688C (nl) | 1986-10-16 |
| NL7707769A (nl) | 1978-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| 8263 | Opposition against grant of a patent | ||
| 8228 | New agent |
Free format text: SCHWABE, H., DIPL.-ING. SANDMAIR, K., DIPL.-CHEM. DR.JUR. DR.RER.NAT., PAT.-ANW., 8000 MUENCHEN |
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| 8281 | Inventor (new situation) |
Free format text: IIJIMA, YASUO SHINOHARA, KOICHI, KOBE, HYOGO, JP FUJITA, TAKASHI ODAGIRI, MASARU, KAWANISHI, HYOGO,JP KUNIEDA, TOSHIAKI, TAKARAZUKA, HYOGO, JP |
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| C3 | Grant after two publication steps (3rd publication) |