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:
Jan. 31, 1995
Filed:
Dec. 07, 1992
Pradeep K Thayamballi, Fremont, CA (US);
Read-Rite Corporation, Milpitas, CA (US);
Abstract
A method and means for reducing readback non-repeatability in thin film heads due to non-repeatablele domain structure, comprising the steps of depositing a layer of antiferromagnetic material, such as MnFe, to create larger uniaxial anisotropy, and localizing such a layer in the upper magnetic pole to improve head performance without sacrificing efficiency. In a particular implementation, alternating layers of NiFe/MnFe/NiFe, each 500 Angstroms thick, are deposited, followed by a sputtered seed layer for subsequent plating. After lapping to correct throat height, the head is then heated above the Neel temperature of MnFe and cooled in the presence of an applied magnetic field.