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:
Dec. 30, 2003
Filed:
Dec. 20, 2000
Applicant:
Inventors:
Peter Crane, Richfield, MN (US);
Derek A. Lewis, Minneapolis, MN (US);
Zine-Eddine Boutaghou, Vadnais Heights, MN (US);
Lee Walter, Plymouth, MN (US);
Assignee:
Seagate Technology LLC, Bloomington, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/596 ;
U.S. Cl.
CPC ...
G11B 5/596 ;
Abstract
An improved microactuator magnetic circuit having a simplified assembly, reduced field leakage, and improved passivation methods is disclosed. To simplify assembly, a single magnet is polarized in two magnetic regions so that the single magnet is functionally similar to two separate magnets. In addition, the magnetic circuit can be produced without a top keeper. Field leakage is reduced by expanding the bottom keeper. Finally, corrosion-resistant alloys with acceptable magnetic properties are used in forming the keeper.