Claims
- 1. A method of producing a magnetic recording medium, comprising the steps of: forming a ferromagnetic metallic film layer on a non-magnetic substrate; forming, by a plasma CVD process, a diamond-type carbon film serving as protective layer on said ferromagnetic metallic film layer; and forming an oxidation layer on said protective layer by a process conducted in a vacuum atmosphere.
- 2. A method according to claim 1, wherein said process is said vacuum atmosphere employs a plasma discharge processing method making use of a material containing oxygen as a reaction gas.
- 3. A method according to claim 1, wherein said process in said vacuum atmosphere includes forming said oxidation layer on said protective layer using a material containing oxygen as the reaction gas, with heat produced by a heat source such as a halogen lamp, infrared heater or the like.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-87615 |
Apr 1989 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07,498,437, filed Mar. 26, 1990, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4900622 |
Nakayama et al. |
Feb 1990 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
498437 |
Mar 1990 |
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