GB1427731A - Magnetic recording media and to methods for their production - Google Patents
Magnetic recording media and to methods for their productionInfo
- Publication number
- GB1427731A GB1427731A GB1277772A GB1277772A GB1427731A GB 1427731 A GB1427731 A GB 1427731A GB 1277772 A GB1277772 A GB 1277772A GB 1277772 A GB1277772 A GB 1277772A GB 1427731 A GB1427731 A GB 1427731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- film
- magnetic recording
- production
- methods
- 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
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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic layers
Landscapes
- Paints Or Removers (AREA)
Abstract
1427731 Magnetic records EMI Ltd 12 March 1973 [18 March 1972] 12777/72 Heading G5R [Also in Division C7] A magnetic recording medium, e.g. tape, card, disc &c., comprises a plastics substrate having a magnetic oxide coating, e.g. γ Fe 2 O 3 , which is coated with a thin metallic magnetic film. The film preferably comprises Co-Cr having 1-20% Cr, but other suitable alloys are Co-W, Co-P, Co-Mb, and Co-Ni-P. In an example, the oxide coating is about 12 Ám thick and the metal film between 0À1 and 0À2 Ám thick. The film may be applied by sputtering or vapour deposition and may be formed over the whole or part of the oxide layer, the latter system being utilized in manufacturing media for video and sound track recording.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1277772A GB1427731A (en) | 1972-03-18 | 1972-03-18 | Magnetic recording media and to methods for their production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1277772A GB1427731A (en) | 1972-03-18 | 1972-03-18 | Magnetic recording media and to methods for their production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1427731A true GB1427731A (en) | 1976-03-10 |
Family
ID=10010932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1277772A Expired GB1427731A (en) | 1972-03-18 | 1972-03-18 | Magnetic recording media and to methods for their production |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1427731A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4172171A (en) * | 1976-11-12 | 1979-10-23 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US4210946A (en) * | 1977-09-30 | 1980-07-01 | Sony Corporation | Magnetic recording medium |
| EP0036767A1 (en) * | 1980-03-25 | 1981-09-30 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording method |
| EP0048414A1 (en) * | 1980-09-22 | 1982-03-31 | Kabushiki Kaisha Toshiba | Magnetic recording medium |
| US4409281A (en) * | 1980-04-21 | 1983-10-11 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US4418126A (en) * | 1980-07-28 | 1983-11-29 | Tdk Electronics Co., Ltd. | Magnetic recording medium |
| GB2186293A (en) * | 1986-02-11 | 1987-08-12 | Emi Plc Thorn | Magnetic thin film recording media |
-
1972
- 1972-03-18 GB GB1277772A patent/GB1427731A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4172171A (en) * | 1976-11-12 | 1979-10-23 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US4210946A (en) * | 1977-09-30 | 1980-07-01 | Sony Corporation | Magnetic recording medium |
| EP0036767A1 (en) * | 1980-03-25 | 1981-09-30 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording method |
| US4409281A (en) * | 1980-04-21 | 1983-10-11 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US4418126A (en) * | 1980-07-28 | 1983-11-29 | Tdk Electronics Co., Ltd. | Magnetic recording medium |
| EP0048414A1 (en) * | 1980-09-22 | 1982-03-31 | Kabushiki Kaisha Toshiba | Magnetic recording medium |
| GB2186293A (en) * | 1986-02-11 | 1987-08-12 | Emi Plc Thorn | Magnetic thin film recording media |
| GB2186293B (en) * | 1986-02-11 | 1990-07-04 | Emi Plc Thorn | Magnetic thin film recording media |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1265175A (en) | ||
| AU528645B2 (en) | Corrosion resistant magentic recording media | |
| GB1344770A (en) | Magnetic recording medium | |
| GB1427731A (en) | Magnetic recording media and to methods for their production | |
| GB1458353A (en) | ||
| GB1272149A (en) | Improvements in and relating to the manufacture of magnetic record devices | |
| EP0374546A3 (en) | Magnetic recording media in disc form, process for their production and information memory containing these magnetic recording media | |
| US5013616A (en) | Magnetic recording medium of thin metal film type | |
| JPS57113414A (en) | Servo disk system | |
| GB1271465A (en) | Magnetic recording material with nickel alloy surface | |
| GB1457258A (en) | Magnetic recording media | |
| JPS57138035A (en) | Magnetic recording medium | |
| JPS5868234A (en) | Composite magnetic recording medium | |
| GB1427724A (en) | Magnetic recording media | |
| JPS62219316A (en) | Magnetic recording medium | |
| JPS59171031A (en) | Magnetic disk | |
| JPS61105721A (en) | Magnetic recording medium | |
| JPS58115632A (en) | magnetic recording medium | |
| JPS60219625A (en) | Magnetic recording medium | |
| JPS61229229A (en) | Magnetic recording medium | |
| JPS61202388A (en) | Magnetic double layer disk for buried servo system | |
| JPS61113121A (en) | Vertical magnetic recording medium | |
| JPH0661129B2 (en) | Magnetic storage | |
| JPS61278012A (en) | Magnetic recording medium | |
| JPS5914122A (en) | Thin film magnetic storage body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
| PCNP | Patent ceased through non-payment of renewal fee |