JPS57138036A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS57138036A JPS57138036A JP56024439A JP2443981A JPS57138036A JP S57138036 A JPS57138036 A JP S57138036A JP 56024439 A JP56024439 A JP 56024439A JP 2443981 A JP2443981 A JP 2443981A JP S57138036 A JPS57138036 A JP S57138036A
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- film
- corrosion
- plastic film
- recording medium
- 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.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 title abstract 2
- 239000010409 thin film Substances 0.000 abstract 10
- 239000002985 plastic film Substances 0.000 abstract 5
- 229920006255 plastic film Polymers 0.000 abstract 5
- 230000007797 corrosion Effects 0.000 abstract 4
- 238000005260 corrosion Methods 0.000 abstract 4
- 230000005294 ferromagnetic effect Effects 0.000 abstract 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000010408 film Substances 0.000 abstract 1
- 238000010030 laminating Methods 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
- G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
- G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
Abstract
PURPOSE:To improve corrosion of a magnetic recording medium easily, by laminating a ferromagnetic thin film on a plastic film via a corrosion-resistant thin film. CONSTITUTION:A corrosion-resistant thin film, preferably an alpha-Fe2-deltaO3 (0<=delta<=1) thin film 4 is formed on the surface 3 of a plastic film 2, and a ferromagnetic thin film 1 is formed on this thin film 4. The thin film 4 is a film where Fe is evaporated and laminated by controlling the temperature of the plastic film 2 and the amount of oxygen, the vapor deposition speed in oxygen atmosphere. Even if water molecules already incorporated in the plastic film 2 appear on the surface 3 of the plastic film 2, since the chemically very stable thin film 4 is formed on the surface 3, the movement of water molecules to the ferromagnetic thin film 1 is interrupted, consequently the corrosion of the ferromagnetic thin film can be reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56024439A JPS57138036A (en) | 1981-02-20 | 1981-02-20 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56024439A JPS57138036A (en) | 1981-02-20 | 1981-02-20 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57138036A true JPS57138036A (en) | 1982-08-26 |
Family
ID=12138172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56024439A Pending JPS57138036A (en) | 1981-02-20 | 1981-02-20 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57138036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969354A (en) * | 1988-07-08 | 1990-11-13 | Nippondenso Co., Ltd. | Intake pipe pressure detecting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5271210A (en) * | 1975-12-11 | 1977-06-14 | Nec Corp | Iron oxide magnetic recording medium and its production |
| JPS531505A (en) * | 1976-06-28 | 1978-01-09 | Hitachi Ltd | High density information recording medium and preparation thereof |
-
1981
- 1981-02-20 JP JP56024439A patent/JPS57138036A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5271210A (en) * | 1975-12-11 | 1977-06-14 | Nec Corp | Iron oxide magnetic recording medium and its production |
| JPS531505A (en) * | 1976-06-28 | 1978-01-09 | Hitachi Ltd | High density information recording medium and preparation thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969354A (en) * | 1988-07-08 | 1990-11-13 | Nippondenso Co., Ltd. | Intake pipe pressure detecting device |
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