Magnetic disk substrate

Details Magnetic disk substrate Magnetic disk substrate

1993-01-13

1994-11-01

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428900, 420417, 420420, 420421, G11B 566, C22C 1400

Patent

active

053606779

ABSTRACT:
A magnetic disk substrate having a composition wherein (V/13)+(Fe/20)+(Cr/17)+(Ni/31)+(Co/23) are no greater than 0.010%, Rem+Si+B+W are no greater than 0.015% (where Rem denotes rare earth metals), 0+2N+0.75C are no less than 0.03% and no greater than 0.5%, and the remainder consists substantially of Ti, all % being weight %.

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patent: 4849205 (1989-07-01), Hong
patent: 4857269 (1989-10-01), Wang et al.
patent: 4871400 (1989-10-01), Shindo et al.
patent: 4874577 (1989-10-01), Wakita et al.
patent: 4886559 (1989-12-01), Shindo et al.
patent: 4990362 (1991-02-01), Kibe et al.
patent: 5236791 (1993-08-01), Yahisa et al.
Patent Abstracts of Japan, vol. 9, No. 2 (P-325), [1725], 8th Jan. 1985, JP-A-59 151 335 (Toshiba K.K.).
Patent Abstracts of Japan, vol. 7, No. 249, (P-234), [1394] 5th Nov. 1983; JP-A-58 133 624 (Suwa Seikosha K.K.) Sep. 8, 1983.
JP 77-74746Y; Magnetic record & replay disc substrate Sep. 5, 1977; Fujitsu ITD; abstract of JP 52-105804.
JP 86-274687/42; Magnetic recording disc; Mar. 1, 1985; Mitsubishi Denki KK; abstract of JP 61-100224.

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