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. 05, 2020
Filed:
Jul. 01, 2019
Western Digital Technologies, Inc., San Jose, CA (US);
Gonçalo Marcos Baião De Albuquerque, San Jose, CA (US);
Yunfei Ding, Fremont, CA (US);
Alexander Goncharov, Morgan Hill, CA (US);
Kuok San Ho, Redwood City, CA (US);
Daniele Mauri, San Jose, CA (US);
Goran Mihajlovic, San Jose, CA (US);
Suping Song, Fremont, CA (US);
Petrus Antonius Van Der Heijden, Cupertino, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
An apparatus comprises a main pole, a trailing shield, a write-field-enhancing structure, a write coil, a write current control circuit configured to supply a write current to the write coil to record a bit to a magnetic medium, and a driving current control circuit configured to supply a driving current to the write-field-enhancing structure, wherein the driving current comprises a driving pulse, and wherein the driving current comprises an AC component with a duty cycle selected based at least in part on a power constraint. A method of writing to a magnetic medium comprises supplying a write current to a write coil of a magnetic write head, and supplying a driving current to a free layer disposed in a write gap between a main pole and a trailing shield, wherein the driving current comprises an AC component with a duty cycle based at least in part on a power constraint.