Back to results
US 2010/0165802 A1Published application
Ridge wave-guide for thermal assisted magnetic recording
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorBarry Cushing Stipe
Life of this patent
Estimating the term…
Abstract
According to one embodiment, an apparatus includes a near field transducer comprising a conductive metal film having a main body with front and back edges and a ridge extending from the front edge of the main body. Also, the apparatus includes an optical waveguide for illumination of the near field transducer, wherein a distance between the ridge and the back edge of the main body is between about 60 and about 240 nanometers.
Claims23
An apparatus, comprising:
- a near field transducer comprising a conductive metal film having a main body with front and back edges and a ridge extending from the front edge of the main body, the ridge extending from the front edge in a direction away from the back edge;
- and
- an optical waveguide for illumination of the near field transducer,
- wherein a distance between an edge of the main body from which the ridge extends and the back edge of the main body is between about 60 and about 240 nanometers.
1 more element
An apparatus, comprising:
- a near field transducer comprising a conductive metal film having a main body with front and back edges and a ridge extending from the front edge of the main body;
- and
- an optical waveguide for illumination of the near field transducer,
- wherein a distance between an edge of the main body from which the ridge extends and the back edge of the main body is between about 25% and about 75% of a wavelength of a surface Plasmon on the near field transducer when illuminated.
1 more element
An apparatus, comprising:
- a near field transducer comprising a conductive metal film having a main body with front and back edges and a ridge extending from the front edge of the main body;
- and
- an optical waveguide for illumination of the near field transducer,
- wherein the back edge is about aligned with a core layer of the optical waveguide.
1 more element
An apparatus, comprising:
- a near field transducer comprising a conductive metal film having a main body with front and back edges and a ridge extending from the front edge of the main body;
- and
- an optical waveguide for illumination of the near field transducer,
- wherein the back edge is about aligned with a core layer of the optical waveguide,
- wherein a distance between the front edge and the back edge of the main body is between about 25% and about 75% of a wavelength of a surface Plasmon on the near field transducer when illuminated.
2 more elements
An apparatus, comprising:
- a near field transducer comprising a conductive metal film having a main body with front and back edges and a ridge extending from the front edge of the main body;
- and
- an optical waveguide for illumination of the near field transducer,
- wherein the back edge is about aligned with a core layer of the optical waveguide,
- wherein a distance between the ridge and the back edge of the main body is between about 45% and about 55% of the wavelength of the surface Plasmon on the near field transducer when illuminated.
2 more elements
Dependencies are inferred from the claim text.