US 12,456,485 B1
Noble metal coated plasmonic waveguide blocker for heat assisted magnetic recording head
Hong Guo, Fremont, CA (US); Dayu Zhou, Fremont, CA (US); Weihao Xu, San Jose, CA (US); Koji Shimazawa, Cupertino, CA (US); Tsutomu Chou, Chiba (JP); and Yukinori Ikegawa, Cupertino, CA (US)
Assigned to Headway Technologies, Inc., Milpitas, CA (US)
Filed by Headway Technologies, Inc., Milpitas, CA (US)
Filed on Jul. 24, 2024, as Appl. No. 18/783,286.
Int. Cl. G11B 5/31 (2006.01); G11B 5/00 (2006.01); G11B 5/48 (2006.01); G11B 5/60 (2006.01); G11B 13/08 (2006.01)
CPC G11B 5/4866 (2013.01) [G11B 5/3116 (2013.01); G11B 5/3163 (2013.01); G11B 5/6088 (2013.01); G11B 13/08 (2013.01); G11B 2005/0021 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A heat-assisted magnetic recording (HAMR) write head comprising:
a main pole;
a waveguide core;
a bilayer transducer disposed between the main pole and the waveguide core;
a dielectric spacer layer disposed adjacent to the waveguide core, wherein the dielectric spacer layer comprises a dielectric material that includes any of: Silicon Oxide (SiOx), Aluminum Oxide (AlOx), Titanium Oxide (TiOx), or Magnesium Oxide (MgOx);
a parabolic waveguide blocker (PWB); and
a noble metal layer disposed between the PWB and the dielectric spacer layer.