US 12,073,857 B1
Perpendicular magnetic recording head equipping a spin torque oscillator element with an electric current in side gaps
Kei Hirata, Sunnyvale, CA (US); Kowang Liu, Fremont, CA (US); Yue Liu, Fremont, CA (US); Jiun-Ting Lee, Sunnyvale, CA (US); and Weihao Xu, San Jose, CA (US)
Assigned to Headway Technologies, Inc., Milpitas, CA (US)
Filed by Headway Technologies, Inc., Milpitas, CA (US)
Filed on Feb. 15, 2023, as Appl. No. 18/110,347.
Int. Cl. G11B 5/11 (2006.01)
CPC G11B 5/11 (2013.01) 12 Claims
OG exemplary drawing
 
1. A perpendicular magnetic recording (PMR) write head comprising:
a main pole comprising a tip portion disposed adjacent to an air bearing surface (ABS) and is configured to interact with a magnetic recording medium;
a spin torque oscillator (STO) element disposed adjacent to the main pole;
a side shield layer with a portion of the side shield layer disposed adjacent to the ABS;
a trailing shield connected to the STO element, wherein the STO element electrically connects the trailing shield to the main pole, wherein the side shield layer is connected to the trailing shield, and wherein the main pole, the side shield layer, and the trailing shield form a parallel electrical circuit directing an electrical path between the main pole, the side shield layer, and the trailing shield; and
a metallic side gap layer disposed between the main pole and the side shield layer.