US 12,249,358 B2
Magnetic recording devices having external alternating current sources
Muhammad Asif Bashir, San Jose, CA (US); Petrus Antonius Van Der Heijden, Cupertino, CA (US); James Terrence Olson, San Jose, CA (US); Alexander Goncharov, Morgan Hill, CA (US); Zhigang Bai, Fremont, CA (US); and Yunfei Ding, Fremont, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Dec. 14, 2023, as Appl. No. 18/540,472.
Application 18/540,472 is a continuation of application No. 17/183,161, filed on Feb. 23, 2021, granted, now 11,869,548.
Claims priority of provisional application 63/107,085, filed on Oct. 29, 2020.
Prior Publication US 2024/0112694 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/00 (2006.01); G11B 5/31 (2006.01)
CPC G11B 5/315 (2013.01) [G11B 5/3116 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A magnetic recording head assembly, comprising:
a magnetic recording head, the magnetic recording head comprising:
an upper pole disposed at a media facing surface (MFS);
a lower pole disposed at the MFS;
a main pole;
a trailing shield disposed between the upper pole and the main pole at the MFS;
a leading shield disposed between the lower pole and the main pole at the MFS; and
a non-magnetic conductive structure disposed between the main pole and the trailing shield, or between the main pole and the leading shield; and
an alternating current (AC) source coupled to the main pole and the upper pole or the lower pole, wherein the AC source is recessed from the MFS.