JPS5611622A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5611622A JPS5611622A JP8375679A JP8375679A JPS5611622A JP S5611622 A JPS5611622 A JP S5611622A JP 8375679 A JP8375679 A JP 8375679A JP 8375679 A JP8375679 A JP 8375679A JP S5611622 A JPS5611622 A JP S5611622A
- Authority
- JP
- Japan
- Prior art keywords
- film
- support
- modulus
- young
- 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
Landscapes
- Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Abstract
PURPOSE: To prevent the magnetic recording medium from being curled, by providing the nonmagnetic substance thin film having the product of a specific multiple to the product between the Young's modulus and the film thickness of the ferromagnetic substance film of one side of the plastic support, to the opposite side of the support.
CONSTITUTION: The nonbinder type magnetic substance film 2 is provided to one side of the plastic support 1 such as polyester, with the ferromagnetic substance metal or its oxide, by means of vacuum evaporation. Since the Young's modulus of this magnetic substance film 2 is 20W500 times as great as that of the plastic support 1, the support 1 is curved convex to the film 2 side to cause curl. To prevent this defect, the nonmagnetic substance thin film layer 3 is formed with a material having greater Young's modulus such as Al, Cu, Al2O3, and SiO2, on another side of the support 1. In this case, the layers 2, 3 are formed so that the product between the film thickness and the Young's modulus of the layer 3 can be 0.5W1.5 times that of the layer 2. Thus, the magnetic recording medium can be prevented from being curved to any side of the layers 2 and 3. Accordingly, failures such as lowering of reproduced output due to improper contactness between the medium and the magnetic head can be avoided.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8375679A JPS5611622A (en) | 1979-07-02 | 1979-07-02 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8375679A JPS5611622A (en) | 1979-07-02 | 1979-07-02 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5611622A true JPS5611622A (en) | 1981-02-05 |
Family
ID=13811387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8375679A Pending JPS5611622A (en) | 1979-07-02 | 1979-07-02 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5611622A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5616843U (en) * | 1979-07-16 | 1981-02-14 | ||
JPS59172158A (en) * | 1983-03-18 | 1984-09-28 | Hitachi Maxell Ltd | Magnetic recording medium |
JPS61240428A (en) * | 1985-04-17 | 1986-10-25 | Tdk Corp | Magnetic recording medium |
US4801481A (en) * | 1982-06-25 | 1989-01-31 | Tokyo Shibaura Denki Kabushiki Kaisha | Perpendicular magnetic recording floppy disk |
-
1979
- 1979-07-02 JP JP8375679A patent/JPS5611622A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5616843U (en) * | 1979-07-16 | 1981-02-14 | ||
US4801481A (en) * | 1982-06-25 | 1989-01-31 | Tokyo Shibaura Denki Kabushiki Kaisha | Perpendicular magnetic recording floppy disk |
JPS59172158A (en) * | 1983-03-18 | 1984-09-28 | Hitachi Maxell Ltd | Magnetic recording medium |
JPH0574129B2 (en) * | 1983-03-18 | 1993-10-15 | Hitachi Maxell | |
JPS61240428A (en) * | 1985-04-17 | 1986-10-25 | Tdk Corp | Magnetic recording medium |
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