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:
Aug. 14, 2001
Filed:
Jan. 21, 1998
Yiming Huai, Pleasanton, CA (US);
Zhupei Shi, San Jose, CA (US);
Yong Shen, Milpitas, CA (US);
Billy Wayne Crue, San Jose, CA (US);
Read-Rite Corporation, Milpitas, CA (US);
Abstract
A magnetic head includes first and second magnetic yoke layers which contact each other at a back closure region at one end and delineate a transducer gap at another end. A toroidal coil encompasses one of the yoke layers. The coil axis of the toroidal coil passes through the encompassed yoke layer. During data writing, electrical current passes through the toroidal coil inducing magnetic flux along the coil axis, which flux is efficiently and directly delivered to the transducer gap for writing on a recording medium. During data reading, magnetic flux intercepted by the transducer gap flows along the encompassed yoke layer and efficiently induces electrical current in the toroidal coil for amplification. In alternative embodiments, separate read transducers are disposed adjacent to the toroidal coils to form merged heads.