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. 05, 2000
Filed:
Jan. 15, 1999
Albert Hartman, Palo Alto, CA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A permanent magnet for an actuator motor of a disk drive is provided herein. The permanent magnet includes an arch shaped magnet body which is made of a magnet powder. The magnet body including a first segment and a second segment which are substantially side by side. Each segment has a north pole and a spaced apart south pole. Each segment includes a first region having a first region axis which extends between the north pole and the south pole and a second region which encircles the first region. Importantly, the magnet powder is aligned during manufacturing to form a powder pattern having first region powder lines in the first region which are substantially parallel with the first region axis and second region powder lines in the second region which are angled relative to the first region axis. Further, the magnet body includes a magnetization pattern having first region magnetization lines in the first region which are substantially parallel with the first region axis and second region magnetization lines in the second region which are angled relative to the first region axis.