Coating processes – Magnetic base or coating – Magnetic coating
Patent
1994-01-14
1995-02-14
Resan, Stevan A.
Coating processes
Magnetic base or coating
Magnetic coating
427131, B05D 512
Patent
active
053893980
ABSTRACT:
A magnetic recording medium for contact recording has a layered structure sequentially with a substrate made of an aluminum alloy having a maximum surface roughness R.sub.max between 100 .ANG. and 300 .ANG. and having no surface protrusions or unevenness higher than 760 .ANG., a magnetic layer formed thereon by sputtering through underlying layers, a non-magnetic first protective film formed by sputtering, a second protective film having hard particulates with average diameter 50-300 .ANG. dispersed in an inorganic oxide film, and a lubricant film. The second protective film is formed by applying a solution containing both an organic compound and the particulates and subjecting it to a heat treatment. The medium has a maximum surface roughness of 100-300 .ANG. and no surface protrusions or unevenness high than 760 .ANG. and is usable for contact recording with a recording head having flying height of less than 760 .ANG..
REFERENCES:
patent: 4254189 (1981-03-01), Fisher
patent: 4560624 (1985-12-01), Guttner et al.
patent: 4664963 (1987-05-01), Sakai et al.
patent: 4666754 (1987-05-01), Arioka et al.
patent: 4833020 (1989-05-01), Shiroishi et al.
Matsudaira Takeo
Suzuki Hisanori
Hoya Corporation
Resan Stevan A.
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