CoFe alloy film and process of making same

Details CoFe alloy film and process of making same CoFe alloy film and process of making same

2005-02-15

2005-02-15

King, Roy (Department: 1742)

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly single metal or alloy coating on...

C205S104000, C205S259000, C205S260000

Reexamination Certificate

active

06855240

ABSTRACT:
A cobalt-iron alloy film having saturation magnetization of at least about 2.30 Telsa. The film alloy includes about 55 wt % to about 75 wt. % iron and the remainder cobalt. The film is made by a process in which the film is electrodeposited from an aqueous medium which includes one or more ferrous salts, one or more cobaltous salts, a buffer having a pKa of about 6 to about 8, at least one carboxylic acid having a pKa of between about 3.5 and about 5.5, an aromatic sulfinic acid or its salt and optionally, a halide salt and/or a surfactant. The alloy film is useful as a write head in magnetic recording.

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