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Cobalt Phosphorus Tin Alloys

IP.com Disclosure Number: IPCOM000081241D
Original Publication Date: 1974-Apr-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Barclay, DJ: AUTHOR [+4]

Abstract

Co-P-Sn alloys with coercivities exceeding 500 Oe at a thickness of 500 Angstroms can be deposited conventionally from electroplating baths consisting of:- CoCl(2) or CoSO(49 NH(4)Cl Na(2)SO(4) NaH(2)PO(3) or Na(2)HPO(3) SnCl(2) NaF NH(4)F. The concentrations of the bath constituents can be varied over a wide range.

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Cobalt Phosphorus Tin Alloys

Co-P-Sn alloys with coercivities exceeding 500 Oe at a thickness of 500 Angstroms can be deposited conventionally from electroplating baths consisting of:- CoCl(2) or CoSO(49

NH(4)Cl

Na(2)SO(4)

NaH(2)PO(3) or Na(2)HPO(3)

SnCl(2)

NaF

NH(4)F. The concentrations of the bath constituents can be varied over a wide range.

The coercivity of these alloys is relatively independent of current and substrate, and their corrosion properties are at least equal to those of, say, Ni- Co-P alloys. Co-P-Sn alloys are thus suitable for providing the magnetic layer of, for example, a magnetic disk record medium.

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