Heat assisted magnetic recording head having near-field transducer with a sloped nose

Patent metadata

Field	Value
Publication number	US-10106885-B2
Application number	US-201715703108-A
Country	US
Kind code	B2
Filing date	Sep 13, 2017
Priority date	Jun 30, 2016
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A magnetic write apparatus includes a pole and a near field transducer. The pole extends in a yoke direction from a media facing surface where the yoke direction extends perpendicular to the media facing surface. The near field transducer includes a near field transducer cap and a near field transducer nose. The near field transducer nose is separated from the pole by the near field transducer cap and a dielectric gap and the near field transducer nose comprises a bevel surface that forms a bevel angle with a plane extending in the yoke direction.

First claim

What is claimed is:

1. A magnetic write apparatus comprising:
a pole extending in a yoke direction from a media facing surface, wherein the yoke direction extends perpendicular to the media facing surface; and
a near field transducer comprising a near field transducer cap and a near field transducer nose,
wherein the near field transducer nose is separated from the pole by the near field transducer cap and a dielectric gap;
wherein the near field transducer nose comprises a bevel surface that forms a bevel angle with a plane extending in the yoke direction; and
wherein a thickness of the near field transducer cap is substantially same as a thickness of the dielectric gap in a down track direction that extends parallel to the media facing surface.

2. The magnetic write apparatus of claim 1 , wherein the near field transducer cap is separated from the media facing surface by the dielectric gap.

3. The magnetic write apparatus of claim 1 , wherein a portion of the dielectric gap is at the media facing surface.

4. The magnetic write apparatus of claim 1 , wherein the near field transducer nose comprises a top surface extending in the yoke direction adjacent to the dielectric gap, and wherein the bevel surface is separated from the top surface by a first surface extending parallel to and occupying the media facing surface.

5. The magnetic write apparatus of claim 4 , wherein a thickness of the first surface a direction parallel to the media facing surface is at least twenty nanometers.

6. The magnetic write apparatus of claim 1 , wherein the near field transducer nose comprises a top surface extending in the yoke direction adjacent to the dielectric gap, and the bevel surface connects to the top surface at the media facing surface.

7. The magnetic write apparatus of claim 1 , wherein the bevel surface extends to the media facing surface.

8. The magnetic write apparatus of claim 1 , wherein the bevel angle is at least twenty degrees and not more than seventy degrees.

9. The magnetic write apparatus of claim 1 , wherein a width of the near field transducer nose in a cross track direction that extends perpendicular to the media facing surface is not more than fifty nanometers, and wherein a thickness of the near field transducer in the down track direction is at least fifty nanometers and not more than one hundred and twenty five nanometers.

10. The magnetic write apparatus of claim 1 , wherein the dielectric gap comprises silicon oxide.

11. The magnetic write apparatus of claim 1 , wherein a width of the dielectric gap in a cross track direction that extends perpendicular to the media facing surface is less than a width of the near field transducer nose in the cross track direction.

12. A magnetic write apparatus comprising:
a near field transducer comprising:
a near field transducer cap having a first surface distal from a media facing surface and a second surface proximate to the media facing surface;
a near field transducer nose having a first surface distal from the media facing surface and a bevel surface extending to the media facing surface, wherein the first surface of the near field transducer nose extends farther from the media facing surface than the first surface of the near field transducer cap in a yoke direction that is perpendicular to the media facing surface; and
a dielectric separating the near field transducer cap from the media facing surface,
wherein the bevel surface extends to a top surface of the near field transducer nose, the top surface extending in the yoke direction.

13. The magnetic write apparatus of claim 12 , wherein the bevel surface forms a bevel angle with a plane extending in the yoke direction.

14. The magnetic write apparatus of claim 12 , wherein a thickness of the near field transducer cap is substantially same as a thickness of the dielectric in a down track direction that extends parallel to the media facing surface.

15. A magnetic write apparatus comprising:
a near field transducer comprising a near field transducer cap and a near field transducer nose; and
a waveguide configured to receive energy from a laser and direct the energy to the near field transducer,
wherein the near field transducer nose comprises a bevel surface that forms a bevel angle with a plane extending in a yoke direction that is perpendicular to a media facing surface of the magnetic write apparatus,
wherein the bevel surface extends to the media facing surface; and
wherein the near field transducer nose comprises a top surface that extends in a single plane in the yoke direction from a back surface of the near field transducer nose to the media facing surface.

16. The magnetic write apparatus of claim 15 , wherein the near field transducer cap is separated from the media facing surface by a dielectric.

17. The magnetic write apparatus of claim 16 , wherein the dielectric and a cladding of the waveguide are constructed of a same material.

18. The magnetic write apparatus of claim 15 , wherein the bevel surface one of extends to the top surface and is separated from the top surface by a first surface extending between the top surface and the bevel surface and occupying the media facing surface.

19. The magnetic write apparatus of claim 1 , wherein the near field transducer nose extends farther than the near field transducer cap in the yoke direction from the media facing surface.

20. The magnetic write apparatus of claim 15 , wherein the back surface of the near field transducer nose extends farther from the media facing surface in the yoke direction than a back surface of the near field transducer cap.

Assignees

• Western Digital Fremont Llc

Inventors

• Tanner Shawn M
• Yu Mingjun
• Zheng Min
• Lee Kyung
• Chen Tsung Yuan

Classifications

• G11B5/314

  where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers (G11B5/3196 takes precedence) · CPC title

• C23C14/5873 Primary

  Removal of material · CPC title

• G11B5/3163

  Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers · CPC title

• G11B5/3116 Primary

  Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks (G11B5/3113, G11B5/245 take precedence) · CPC title

• G11B5/855

  Coating only part of a support with a magnetic layer · CPC title