Disk substrate for magnetic disk

Details Disk substrate for magnetic disk Disk substrate for magnetic disk

1991-02-19

1992-06-30

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428694, G11B 2300

Patent

active

051261790

ABSTRACT:
A magnetic disk substrate contains Ti as main constituent, and O and Al as additive constituents. A mounts of O and Al falls within the range which satisfies O.ltoreq.0.6, Al.ltoreq.4, and 2.5 O+Al/3.gtoreq.1 (wt. %). The balance consists of Ti and unavoidable impurities.

REFERENCES:
patent: 4808455 (1989-02-01), Wada et al.
patent: 4876117 (1989-10-01), Bornstein

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