Thin film disk with onset layer

Details Thin film disk with onset layer Thin film disk with onset layer

1997-11-24

2000-11-07

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 657, 428336, 428694T, 428694TS, 428694TM, 428900, 360128, G11B 566

Patent

active

061433888

ABSTRACT:
A thin film disk and a disk drive using the thin film disk are described. The disk has an onset layer between the underlayer and the boron containing magnetic layer, for example. The onset layer of the invention is useful because the boron containing magnetic layer material resists being deposited with the C-axis in plane. The onset layer material is selected to promote an in-plane C-axis orientation. When a boron containing magnetic layer is deposited on the onset layer the resulting in-plane PO is improved. The preferred onset layer is of hexagonal closed pack structured material which may be magnetic or nonmagnetic. Materials which are usable for the onset layer include a wide range of pure elements and cobalt alloys such as CoCr, CoPtCr, CoPtCrTa and CoCrB. The onset layer is particularly useful in allowing a ferromagnetic cobalt (Co) alloy containing a relatively high chromium and boron content to be deposited on nonmetallic substrates with the C-axis in the plane of disk without the need for negative bias during the sputtering of the underlayer.

REFERENCES:
patent: 4654276 (1987-03-01), Ahlert
patent: 4677032 (1987-06-01), Robinson
patent: 4749628 (1988-06-01), Ahlert
patent: 4810592 (1989-03-01), Miyabayashi
patent: 5587235 (1996-12-01), Suzuki et al.
patent: 5605733 (1997-02-01), Ishikawa et al.
patent: 5693426 (1997-12-01), Lee
patent: 5736262 (1998-04-01), Ohkijima et al.
patent: 5766727 (1998-06-01), Moroishi
patent: 5820963 (1998-10-01), Lu et al.
patent: 5851643 (1998-12-01), Honda et al.

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