JPS57169925A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS57169925A JPS57169925A JP56056042A JP5604281A JPS57169925A JP S57169925 A JPS57169925 A JP S57169925A JP 56056042 A JP56056042 A JP 56056042A JP 5604281 A JP5604281 A JP 5604281A JP S57169925 A JPS57169925 A JP S57169925A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- support
- recording medium
- layer
- magnetic recording
- 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.)
- Granted
Links
- 239000010408 film Substances 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 239000013528 metallic particle Substances 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- -1 polyethylene terephthalate Polymers 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract 1
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 229920006254 polymer film Polymers 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
- 238000007740 vapor deposition Methods 0.000 abstract 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
- G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
Landscapes
- Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Abstract
PURPOSE:To achieve a magnetic recording medium with high performance by forming a magnetic film of high coercive magnetic force on a high polymer support with comparatively lower heat resistance, by forming Bi layers on a nonmagnetic support in discontinuous islands and a metallic magnetic thin film thereon. CONSTITUTION:A high polymer film with comparatively lower heat resistance such as polyethylene terephthalate is used as a support 1, Bi is vapor-deposited on the major plane as discontinuous islands 2 and a background layer 2 is formed. Next, a metallic magnetic layer 3 such as Co covering the entire surface of an exposed part of the layer 2 and the support 1 is formed to make a magnetic recording medium 4. The islands 2 can be formed by vapor deposition of Bi at the temperature from 130 deg.C to the melting point of Bi. Since the support 1 is hardly deformed through indirect contact of metallic particles at high temperatures due to forming of the layer 3 next, plastic can be used. Thus, a magnetic recording medium suitable for a disc of magnetic isotropy with high coercive force can be obtained.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56056042A JPS57169925A (en) | 1981-04-14 | 1981-04-14 | Magnetic recording medium |
CA000400530A CA1188796A (en) | 1981-04-14 | 1982-04-06 | Magnetic recording medium |
DE19823213352 DE3213352A1 (en) | 1981-04-14 | 1982-04-08 | MAGNETIC RECORDING MEDIUM |
NL8201567A NL8201567A (en) | 1981-04-14 | 1982-04-14 | MAGNETIC RECORD MEDIUM. |
FR8206428A FR2503909B1 (en) | 1981-04-14 | 1982-04-14 | MAGNETIC RECORDING MEANS |
GB8210807A GB2096647B (en) | 1981-04-14 | 1982-04-14 | Magnetic recording media |
US06/540,707 US4539265A (en) | 1981-04-14 | 1983-10-11 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56056042A JPS57169925A (en) | 1981-04-14 | 1981-04-14 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57169925A true JPS57169925A (en) | 1982-10-19 |
JPS6256570B2 JPS6256570B2 (en) | 1987-11-26 |
Family
ID=13016025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56056042A Granted JPS57169925A (en) | 1981-04-14 | 1981-04-14 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57169925A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60170030A (en) * | 1984-02-10 | 1985-09-03 | Sony Corp | Production of magnetic recording medium |
JPH03189922A (en) * | 1989-10-05 | 1991-08-19 | Internatl Business Mach Corp <Ibm> | Magnetic memory medium and method of manufacturing the same |
-
1981
- 1981-04-14 JP JP56056042A patent/JPS57169925A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60170030A (en) * | 1984-02-10 | 1985-09-03 | Sony Corp | Production of magnetic recording medium |
JPH0550053B2 (en) * | 1984-02-10 | 1993-07-28 | Sony Corp | |
JPH03189922A (en) * | 1989-10-05 | 1991-08-19 | Internatl Business Mach Corp <Ibm> | Magnetic memory medium and method of manufacturing the same |
JPH0561685B2 (en) * | 1989-10-05 | 1993-09-06 | Ibm |
Also Published As
Publication number | Publication date |
---|---|
JPS6256570B2 (en) | 1987-11-26 |
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