Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1987-12-15
1990-01-23
Thibodeau, Paul J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
427130, 427131, 427132, 428433, 428469, 428694, 428900, G11B 564
Patent
active
048957623
ABSTRACT:
In construction of a magnetic recording material having overlaid anodic oxide layers and well suited for perpendicular magnetic recording, a substrate is made of a hard material and Al predominant layers of 0.1 to 2 .mu.m thickness and formed on the substrate as a base for the overlaid anodic oxide layers for improvement in mechanical properties with acceptable magnetic recording characteristics.
REFERENCES:
patent: 4109287 (1978-08-01), Kawai et al.
patent: 4548682 (1985-10-01), Yoshida et al.
patent: 4563397 (1986-01-01), Ishiguro et al.
patent: 4650708 (1987-03-01), Takahashi
patent: 4659606 (1987-04-01), Wada et al.
Shiraki Makoto
Suzuki Yoshifumi
Tokushima Tadao
Wakui Yukio
Thibodeau Paul J.
Yamaha Corporation
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