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:
Nov. 17, 1998
Filed:
Apr. 17, 1995
Durga P Ravipati, Saratoga, CA (US);
Read-Rite Corporation, Milpitas, CA (US);
Abstract
A magnetoresistive read transducer includes a magnetoresistive layer that is sandwiched between a pair of laminated magnetic shields. Each laminated magnetic shield includes at least two layers of ferromagnetic material spaced by a layer of non-magnetic material. The respective magnetization vectors of uniaxial anisotropy in the shields are opposite to each other. The magnetization vectors in the two ferromagnetic layers form a closed magnetic path which is substantially perpendicular to the surfaces of the layer interfaces. The magnetic pattern thus formed is highly stable, so that the magnetoresistive layer generates output signals with low Barkhausen noise and further allows the transducer to interact with recording media having high linear recording density.