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US 9,524,740 B2Granted
Waveguide of a write head with reduced crosstrack width proximate a near-field transducer
AssigneeSeagate Technology LLC
InventorsRuoxi Yang, Werner Scholz
Life of this patent
Estimating the term…
Abstract
A write head includes a near-field transducer near a media-facing surface of the write head and a waveguide. The waveguide includes a core that overlaps or is co-planer with the near-field transducer at a first region. The core has a second region extending away from the near-field transducer to an energy source. The core has a third region between the first and second regions. The third region has a third crosstrack width that is less than first and second crosstrack widths of the first and second regions.
Claims20
A write head, comprising:
- a near-field transducer near a media-facing surface of the write head;
- and
- a waveguide comprising a core that overlaps or is co-planer with the near-field transducer at a first region, the core having a second region extending away from the near-field transducer to an energy source, and a third region between the first and second regions, the first and second regions having first and second crosstrack widths and the third region having a third crosstrack width that is less than the first and second crosstrack widths.
A write head, comprising:
- a near-field transducer near a media-facing surface of the write head;
- and
- a waveguide comprising a waveguide core that receives light from a light source at a first end and has a second end proximate the near-field transducer, the waveguide core having a region of reduced crosstrack width between the near-field transducer and the first end that reduces reflections of the light back to the light source.
A method comprising:
- coupling light into a waveguide core from a light source at a first end of the waveguide core, the waveguide core having a second end proximate a near-field transducer;
- coupling the light to the near-field transducer at the second end;
- and
- reducing reflections of the light back to the light source via a region of reduced crosstrack width of the waveguide core between the near-field transducer and the first end.
1 more element
Dependencies are inferred from the claim text.