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:
Sep. 15, 2009
Filed:
Dec. 01, 2004
James P. R. Mcfadyen, Redwood City, CA (US);
Michael Mallary, Sterling, MA (US);
James P. R. McFadyen, Redwood City, CA (US);
Michael Mallary, Sterling, MA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A slider for use in a disk drive system with a read/write head that has a write coil as part of a write transducer. The write coil has a center tap thereon for connection to a conductor in addition to the connection of the ends of the write coil to two other conductors. This allows the write coil to be driven from opposite ends with opposite but equal currents in addition to the write currents that are used in write mode or alone in modes other than in write mode, such as just before write mode is entered. The current flowing in or out of the center tap then will be the sum of the currents flowing out or into the opposite ends of the write coil. In this manner, no magnetic fringing field is created since the currents/fields cancel each other out. Also, the power dissipation in the write coil during this time will be approximately the same as in write mode and a similar amount of pole tip protrusion should be produced thereby.