US 11,869,548 B1
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 Feb. 23, 2021, as Appl. No. 17/183,161.
Claims priority of provisional application 63/107,085, filed on Oct. 29, 2020.
Int. Cl. G11B 5/00 (2006.01); G11B 5/31 (2006.01)
CPC G11B 5/315 (2013.01) [G11B 5/3116 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A magnetic recording head assembly, comprising:
a magnetic recording head, the magnetic recording head comprising:
a lower pole,
an upper pole,
a main pole between the upper pole and the lower pole,
a leading shield on a leading side of the main pole,
a trailing shield on a trailing side of the main pole, and
a conductive structure between the main pole and the trailing shield, the conductive structure comprising a conductive layer, wherein the conductive layer is nonmagnetic; and
an alternating current (AC) source coupled to the main pole and the upper pole of the magnetic recording head, wherein the AC source supplies AC current to the main pole and receives AC current returned from the upper pole.