Claims
- 1. A magnetic recording medium characterized in that a thin film of ferromagnetic metal containing oxygen is formed over the surface of an elongated polyester film which is coated with worm-like or particle-like projections comprising a cured high-molecular weight compound having a surface roughness, R.sub.max, of 0.003 to 0.1 micrometers and wherein the back surface of said film also has worm-like or particle-like projections comprising a cured high-molecular weight compound and is further formed with a thin film of a high-molecular weight compound containing a lubricant.
- 2. A magnetic recording medium as set forth in claim 1 further characterized in that
- said thin film of ferromagnetic metal is formed over a nonmagnetic thin film which in turn is formed over the surface of said elongated polyester film and which contains oxygen.
- 3. A process for fabricating magnetic recording media characterized by the steps of
- forming, in vacuum containing oxygen, a thin film of a ferromagnetic metal or alloy over the front surface of an elongated polyester film, the front surface thereof being coated with worm-like or particle-like projections comprising a cured high-molecular weight compound having a surface roughness, R.sub.max, of 0.003 to 0.1 micrometers while the back surface thereof being coated with worm-like or particle-like projections comprising a cured high-molecular compound or with a thin film of a resin dispersed with finely divided solid particles.
- 4. A process for fabricating magnetic recording media as set forth in claim 3 further characterized by a step of, after said thin film or a ferromagnetic metal or alloy having been formed, forming a thin film of a high-molecular compound containing a lubricant over the back surface of said elongated polyester film.
- 5. A magnetic recording medium characterized in that a thin ferromagnetic metal film containing more than 3% oxygen, in terms of atomic ratio, is directly or through a thin non-magnetic film containing more than 3% oxygen, formed over the front surface of an elongated polyester film whose surface roughness is from 0.003 to 0.1 micrometers in terms of R.sub.max and whose front and back surfaces have worm-like or particle-like projections comprised of a cured high-molecular weight compound and wherein said back surface has a thin film of a high-molecular weight compound containing a lubricant.
Priority Claims (2)
Number |
Date |
Country |
Kind |
55-113898 |
Aug 1980 |
JPX |
|
55-113904 |
Aug 1980 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 575,480 filed Jan. 30, 1984 now abandoned, which is a continuation of application Ser. No. 293,147 filed Aug. 17, 1981 now abandoned.
US Referenced Citations (6)
Continuations (2)
|
Number |
Date |
Country |
Parent |
575480 |
Jan 1984 |
|
Parent |
293147 |
Aug 1981 |
|