US 12,444,436 B1
Parabolic shaped plasmonic waveguide blocker for heat assisted recording head
Hong Guo, Fremont, CA (US); Dayu Zhou, Fremont, CA (US); Tobias Maletzky, San Jose, CA (US); Weihao Xu, San Jose, CA (US); Koji Shimazawa, Cupertino, CA (US); and Tsutomu Chou, Chiba (JP)
Assigned to Headway Technologies, Inc., Milpitas, CA (US)
Filed by Headway Technologies, Inc., Milpitas, CA (US)
Filed on May 30, 2024, as Appl. No. 18/678,681.
Int. Cl. G11B 5/40 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/40 (2013.01) [G11B 2005/0021 (2013.01)] 14 Claims
OG exemplary drawing
 
10. A waveguide blocker for a write head comprising:
a first side that is tapered at an angle-ranging between 10 and 90 degrees; and
a parabolic portion disposed in a center of the first side of the waveguide blocker, wherein the waveguide blocker is configured to reduce electromagnetic radiation from a waveguide core and recycle a scattering field emitting from the NFT to mitigate a thermal background in a recording medium and improve a thermal gradient to increase an area density capacity (ADC) of the write head.