Ferromagnetic memory layer, methods of making and adhering it to

Details Ferromagnetic memory layer, methods of making and adhering it to Ferromagnetic memory layer, methods of making and adhering it to

1972-02-15

1977-04-12

Andrews, R. L.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

204 20, 204 30, 204 28, 204 29, 204 38B, 204 38E, 204 48, 340174TF, 427304, 427305, 427306, 427132, 428928, C25D 556, C25D 500, C25D 510, C25D 524

Patent

active

040172651

ABSTRACT:
A thin, ferromagnetic layer which can be continuous, substantially pit-free and uniform, said layer having high bit density capabilities consisting essentially of cobalt in the form of close packed hexagonal crystals. A substrate is treated with a catalytic activator upon which is deposited an electroless conductive layer, such as copper; the cobalt layer is deposited by electroplating on the conductive layer. The ferromagnetic layer has a nominal coercivity of about 200 to about 500 oersteds and exhibits no anisotropy in the plane of deposition.

REFERENCES:
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patent: 3227635 (1966-01-01), Koretzky et al.
patent: 3269854 (1966-08-01), Hei
patent: 3485725 (1969-12-01), Koretzky
patent: 3488166 (1970-01-01), Kovac et al.
patent: 3518170 (1970-06-01), Koretzky
patent: 3523824 (1970-08-01), Powers et al.
patent: 3661783 (1972-05-01), Cooper
"Electroplating of Co & Co Alloys-A Review," by Morral, Plating, 6-67, pp. 693, 696.
"Modern Electroplating," by F. A. Lowenheinn, 1963, pp. 143-144.

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