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:
Jan. 16, 2024
Filed:
Jul. 22, 2022
Applicant:
Headway Technologies, Inc., Milpitas, CA (US);
Inventor:
Yue Liu, Fremont, CA (US);
Assignee:
Headway Technologies, Inc., Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/11 (2006.01);
U.S. Cl.
CPC ...
G11B 5/11 (2013.01);
Abstract
A perpendicular magnetic recording (PMR) writer is disclosed. A write current passes through a driving coil and a bucking coil generates a magnetic flux that passes through the main pole tip and is used to write one or more magnetic bits in a magnetic medium. The improved PMR writer includes a double driving coil (DDC) design, in which a second electric current path in parallel with the driving coil through the main pole tip is added to drive the main pole in the same direction as the top driving coil.