Near field transducer having main body and wings extending therefrom and only electrically coupled thereby
View Patent ↗According to one embodiment, an apparatus includes a near field transducer comprising a conductive metal film having a main body, a ridge extending from the main body, and wings extending from the main body in a same direction as the ridge, wherein the wings are only electrically coupled by the main body. In another embodiment, an apparatus includes a near field transducer comprising a conductive metal film having a main body, a ridge extending from the main body, and wings extending from the main body in a same direction as the ridge. Also the apparatus includes a layer of magnetic material positioned beyond the wings relative to the main body, wherein a length of the layer of magnetic material adjacent the near field transducer is at least about coextensive with a length of the main body in a same direction.
1. An apparatus, comprising:
a near field transducer comprising a conductive metal film having a main body, a ridge extending from the main body, and wings extending from the main body in a same direction as the ridge, wherein the wings are only electrically coupled by the main body,
wherein the near field transducer is configured to heat a magnetic disk in a vicinity of the ridge upon exposure of the conductive metal film to light.
2. The apparatus as recited in claim 1 , further comprising a dielectric layer positioned between portions of the wings extending from the main body.
3. The apparatus as recited in claim 1 , wherein no electrical conductor is positioned between the wings extending from the main body.
4. The apparatus as recited in claim 1 , further comprising a layer of magnetic material positioned between portions of the wings extending from the main body, the layer of magnetic material being electrically isolated from the wings.
5. The apparatus as recited in claim 4 , further comprising at least one dielectric layer between the layer of magnetic material and the portions of the wings extending from the main body.
6. The apparatus as recited in claim 1 , further comprising a layer of magnetic material positioned beyond the wings relative to the main body, wherein a length of the layer of magnetic material adjacent the near field transducer is at least about coextensive with a length of the main body in a same direction.
7. The apparatus as recited in claim 1 , further comprising an optical waveguide for illumination of the near field transducer, wherein a light guiding core layer of the optical waveguide is spaced from the near field transducer by less than about 100 nanometers and greater than 0 nanometers.
8. The apparatus as recited in claim 1 , wherein a distance between one of the wings and the ridge is about the same as a length of the main body between an edge from which the ridge extends and an opposite edge.
9. The apparatus as recited in claim 8 , wherein the distance is between about 100 nanometers and about 150 nanometers.
10. An apparatus as recited in claim 1 , further comprising:
a layer of magnetic material positioned beyond the wings relative to the main body, wherein a length of the layer of magnetic material adjacent the near field transducer is at least about coextensive with a length of the main body in a same direction.
11. The apparatus as recited in claim 10 , wherein the wings are only electrically coupled by the main body.
12. The apparatus as recited in claim 10 , wherein the layer of magnetic material is also positioned between the wings, the layer of magnetic material being electrically isolated from the wings.
13. The apparatus as recited in claim 10 , further comprising at least one dielectric layer between the layer of magnetic material and the near field transducer.
14. The apparatus as recited in claim 10 , further comprising an optical waveguide for illumination of the near field transducer, wherein a light guiding core layer of the optical waveguide is spaced from the near field transducer by less than about 100 nanometers and greater than 0 nanometers.
15. The apparatus as recited in claim 10 , wherein a distance between one of the wings and the ridge is about the same as a length of the main body between an edge from which the ridge extends and an opposite edge.
16. An apparatus as recited in claim 1 ,
wherein a distance between one of the wings and the ridge is about the same as a length of the main body between an edge from which the ridge extends and an opposite edge.
17. The apparatus as recited in claim 16 , wherein the wings are only electrically coupled by the main body.
18. The apparatus as recited in claim 16 , further comprising a layer of magnetic material positioned between the wings, the layer of magnetic material being electrically isolated from the wings.
19. The apparatus as recited in claim 16 , further comprising a layer of magnetic material positioned beyond the wings relative to the main body, wherein a length of the layer of magnetic material adjacent the near field transducer is at least about coextensive with a length of the main body in a same direction.
20. The apparatus as recited in claim 16 , further comprising an optical waveguide for illumination of the near field transducer, wherein a light guiding core layer of the optical waveguide is spaced from the near field transducer by less than about 100 nanometers and greater than 0 nanometers.
21. A magnetic data storage system, comprising:
a magnetic head having a near field transducer as recited in claim 1 ;
a magnetic medium;
a drive mechanism for passing the magnetic medium over the magnetic head; and
a controller electrically coupled to the magnetic head for controlling operation of the magnetic head.
22. The apparatus as recited in claim 1 , wherein the conductive metal film is nonmagnetic.
23. The apparatus as recited in claim 1 , wherein the conductive metal film is constructed of a material selected from a group consisting of Au, Ag, Al, and Cu.
24. The apparatus as recited in claim 1 , further comprising an optical waveguide for illumination of the conductive metal film, the conductive metal film being configured to create heat when illuminated.