Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1990-02-05
1991-07-30
Thibodeau, Paul J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428329, 428694, 428695, 428900, G11B 2300
Patent
active
050358561
ABSTRACT:
A magnetic recording medium having plural magnetic layers is disclosed. The uppermost magnetic layer contains an abrasive with an average particle diameter of not more than 0.3 .mu.m, and a magnetic layer other than the uppermost magnetic layer contains an abrasive with an average particle diameter of not less than 0.3 .mu.m. The medium is improved in the electromagnetic conversion characteristics and sliding noise.
REFERENCES:
patent: 4259392 (1981-03-01), Suzuki
patent: 4475946 (1984-10-01), Matsufuji et al.
patent: 4687704 (1987-08-01), Miyoshi et al.
patent: 4784895 (1988-11-01), Mizuno et al.
patent: 4865924 (1989-09-01), Saito et al.
Kawabe Shigetoshi
Kawahara Setsuko
Koyama Noboru
Nakano Yasushi
Namiki Takemasa
Bierman Jordan B.
Konica Corporation
Thibodeau Paul J.
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