US 10,891,974 B1
Magnetic head with current assisted magnetic recording and method of making thereof
Venkatesh Chembrolu, San Jose, CA (US); Zhigang Bai, Fremont, CA (US); Yaguang Wei, San Jose, CA (US); Anna Zheng, San Ramon, CA (US); Supradeep Narayana, San Jose, CA (US); Suping Song, Fremont, CA (US); Terence Lam, San Jose, CA (US); Michael Ho, San Jose, CA (US); Changqing Shi, San Ramon, CA (US); Lijie Guan, Cupertino, CA (US); and Jian-Gang Zhu, San Jose, CA (US)
Assigned to SANDISK TECHNOLOGIES LLC, Addison, TX (US)
Filed by SANDISK TECHNOLOGIES LLC, Addison, TX (US)
Filed on Jun. 5, 2018, as Appl. No. 16/33.
Claims priority of provisional application 62/497,299, filed on Jun. 7, 2017.
Int. Cl. G11B 5/31 (2006.01); G11B 5/23 (2006.01); G11B 5/115 (2006.01); G11B 5/187 (2006.01); G11B 5/127 (2006.01)
CPC G11B 5/115 (2013.01) [G11B 5/1278 (2013.01); G11B 5/187 (2013.01); G11B 5/23 (2013.01); G11B 5/315 (2013.01); G11B 5/3133 (2013.01); G11B 5/3146 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A magnetic head, comprising:
a main pole configured to serve as a first electrode;
an upper pole comprising a trailing magnetic shield configured to a serve as a second electrode; and
a record element located in a trailing gap between the main pole and the trailing magnetic shield, the record element comprising an electrically conductive, non-magnetic material portion and a spin torque oscillator stack;
wherein the electrically conductive, non-magnetic material portion is not part of the spin torque oscillator stack,
wherein the main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element, and
wherein the electrically conductive path comprises a first electrically conductive path between the first electrode and the second electrode through the spin torque oscillator stack, and a parallel second electrically conductive path between the first electrode and the second electrode through the electrically conductive, non-magnetic material portion.