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:
May. 31, 2016
Filed:
Jun. 05, 2015
Applicant:
Hgst Netherlands B.v., Amsterdam, NL;
Inventors:
Jun Aoyama, Kanagawa, JP;
Masato Shiimoto, Hiratsuka, JP;
Assignee:
HGST Netherlands B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/31 (2006.01); G11B 5/127 (2006.01);
U.S. Cl.
CPC ...
G11B 5/3133 (2013.01); G11B 5/1278 (2013.01);
Abstract
A method, apparatus, and system are provided for implementing spin-torque oscillator (STO) erasure prevention for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs). A first voltage is applied to an STO element in the MAMR head at the time of write operation. A second voltage is applied to the STO element at the time of read operation, or not write operation, to prevent STO erasure otherwise resulting from remnant magnetization of STO at the time of read operation.