US 12,456,484 B1
Tapered optical and magnetic elements for improved writing in heat-assisted magnetic recording
Shehrin Sayed, Fremont, CA (US); Hong Guo, Fremont, CA (US); and Yuhui Tang, Milpitas, CA (US)
Assigned to Headway Technologies, Inc., Milpitas, CA (US)
Filed by Headway Technologies, Inc., Milpitas, CA (US)
Filed on Dec. 12, 2024, as Appl. No. 18/979,363.
Int. Cl. G11B 5/00 (2006.01); G11B 5/31 (2006.01); G11B 5/48 (2006.01)
CPC G11B 5/31 (2013.01) [G11B 5/4866 (2013.01); G11B 2005/0021 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A writer head for a heat-assisted magnetic recording (HAMR) device, the writer head comprising:
an optical component including a triangular layer having a tapered edge and a waveguide (WG) layer positioned adjacent to the triangular layer, the WG layer including a flat section and a tapered section, the tapered section including a tapered angle and contacting the tapered edge of the triangular layer;
a cladding layer positioned adjacent to the WG layer;
a near field transducer (NFT) layer positioned adjacent to the cladding layer, the NFT layer including a tapered section that includes the tapered angle;
a heat sink layer positioned adjacent to the NFT layer; and
a peg layer positioned adjacent to the heat sink layer and comprising an insulator and a tapered section comprising the tapered angle; and
a magnetic component that includes a magnetic main pole having a first tapered section comprising the tapered angle, a main pole section substantially parallel to the flat section of the WG layer, and wherein the magnetic main pole has a saturation magnetization of about 24 kG or greater.