Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1991-09-26
1994-05-31
Resan, Stevan A.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428328, 428331, 428336, 428409, 428641, 428646, 428650, 428651, 428658, 428660, 428662, 428663, 428664, 428666, 428667, 428611, 428900, 428928, 428694SG, 428694TR, 428694TS, 428694TP, G11B 500
Patent
active
053168445
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 of Tiw film and Cr film, 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..
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Matsudaira Takeo
Suzuki Hisanori
Hoya Electronics Corporation
Resan Stevan A.
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