Patent ID: 11894031
Assignee: SAE TECHNOLOGIES DEVELOPMENT (DONGGUAN) CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A thermally assisted magnetic recording (TAMR) head wherein waveguide light excites a resonant mode in a near field transducer (NFT) of claim 1 that propagates to an air bearing surface (ABS) and is coupled to a magnetic medium to facilitate a write process, comprising:
(a) a main pole layer having a front side at the ABS and a bottom surface that is a leading side during the write process;
(b) a waveguide having a top surface facing the main pole layer and wherein light from a laser diode is propagated toward the ABS, and with a front side that faces the ABS;
(c) the near field transducer that is formed between the main pole layer and the waveguide at the ABS;
(d) a blocker comprising a metal formed between a front side of the waveguide and the ABS, the blocker prevents waveguide light not coupled to the NFT from reaching the ABS, wherein the blocker has a back side with a maximum distance from the ABS that is less than a distance of the front side of the waveguide from the ABS; and
(e) a dielectric layer between the blocker back side and the waveguide front side.