US 12,249,355 B1
Multi-layer NFT for HAMR with a thermal shunt connecting the metal layers
Takuya Matsumoto, San Jose, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Aug. 31, 2023, as Appl. No. 18/241,164.
Int. Cl. G11B 5/31 (2006.01); G11B 5/48 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/3106 (2013.01) [G11B 5/4866 (2013.01); G11B 2005/0021 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A magnetic recording head, comprising:
a main pole;
a waveguide disposed adjacent to the main pole;
a thermal shunt disposed between the main pole and the waveguide, the thermal shunt being recessed from a media facing surface (MFS); and
a near field transducer (NFT) coupled between the main pole and the waveguide at the MFS, the NFT comprising:
a first metal layer disposed adjacent to the waveguide;
a dielectric gap layer disposed on and in contact with the first metal layer; and
a second metal layer disposed on and in contact with the dielectric gap layer, wherein the first metal layer and the second metal layer are each disposed in contact with the thermal shunt.