The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1987
Filed:
Apr. 21, 1986
Applicant:
Inventors:
Nathaniel C Anderson, Pine Island, MN (US);
Robert B Chesnutt, Tucson, AZ (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 445 ;
Abstract
A bath for electroplating a high cobalt magnetic alloy material suitable for fabrication of thin film heads. The ternary cobalt-nickel-iron (CoNiFe) alloy electroplating bath composition produces a high cobalt magnetic thin film having high saturation magnetization, a magnetostriction coefficient that is substantially zero, and low coercivity. A process suitable for deposition of the soft magnetic material provides a thin film head where 4.pi.Ms is higher than 14K gauss, Hc is less than 20e, 1-10 MHZ permeability is near 1000, and has a near zero magnetostriction.