US 11,894,031 B1
Self-aligned hybrid near field transducer with single peg grain
Xuhui Jin, Sunnyvale, CA (US); Pengbo Yang, Dongguan (CN); Koji Shimazawa, Cupertino, CA (US); Hong Guo, Fremont, CA (US); Qinghui Guo, Dongguan (CN); and Vincent Man Fat Chiah, Shatin (HK)
Assigned to Headway Technologies, Inc., Milpitas, CA (US); SAE Technologies Development (Dongguan) Co., Ltd., Dongguan (CN); and SAE Magnetics (Hong Kong) Limited, Shatin (HK)
Filed by Headway Technologies, Inc., Milpitas, CA (US); SAE Technologies Development (Dongguan) Co., Ltd., Dongguan (CN); and SAE Magnetics (Hong Kong) Limited, Shatin (HK)
Filed on Dec. 30, 2022, as Appl. No. 18/091,809.
Int. Cl. G09G 3/32 (2016.01); G11B 5/60 (2006.01); G11B 5/31 (2006.01); G11B 5/48 (2006.01); G11B 13/08 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/6088 (2013.01) [G11B 5/314 (2013.01); G11B 5/4866 (2013.01); G11B 13/08 (2013.01); G11B 2005/0021 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A near field transducer (NFT) formed between a main pole layer and a waveguide in a thermally assisted magnetic recording (TAMR) head wherein waveguide light excites a NFT resonant mode that propagates to an air bearing surface (ABS) and is coupled to a magnetic medium to facilitate a write process, the NFT comprises:
(a) a resonator body layer made of a first metal or alloy with a plasmonic character and having a first thickness (t1) in a down-track direction wherein the NFT resonant mode is excited, the resonator body layer has a front side having a first cross-track width at a first plane that is recessed a first distance from the ABS; and
(b) a peg layer having a second thickness (t2) in a down-track direction wherefrom the NFT resonant mode is coupled to the magnetic medium, the peg layer is a single layer comprising a single material that is a noble metal or alloy thereof and is different from the first metal or alloy and comprises:
a peg portion or peg with a front side at the ABS, the peg portion or the peg having a single peg grain with or without a desired (111) orientation, a back side at the first plane, and two sides aligned orthogonal to the ABS and separated by the first cross-track width.