Method of making a write head core

Patent metadata

Field	Value
Publication number	US-9922669-B2
Application number	US-201514981470-A
Country	US
Kind code	B2
Filing date	Dec 28, 2015
Priority date	Mar 15, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Implementations disclosed and claimed herein include a method of write head core located in a slider, the write head core comprising a first end operative to serve as a write pole, a second end operative to serve as a return pole, wherein the first end comprises a substantially smaller cross-sectional area than the second end, and wherein the write head core has a substantially smooth curvature.

First claim

What is claimed is:

1. A method comprising:
forming a write head core located in a slider, including:
forming a first end operative to serve as a write pole; and
forming a second end operative to serve as a return pole, wherein the first end comprises a substantially smaller cross-sectional area than the second end, wherein the write head core is formed in a processing plane of a thin film wafer, wherein a longitudinal cross-section of the write head core is formed substantially perpendicular to an air bearing surface (ABS) of the write head core, wherein the write head core has a substantially smooth curvature; and wherein a near-field transducer is located near the write pole.

2. The method of claim 1 , wherein the forming the write head core includes forming a magnetic core of a tapered shape.

3. The method of claim 1 , further comprising forming a multi-turn coil located between the write pole and the return pole of the write head core, wherein the multi-turn coil has two ends extending away from the write head core.

4. The method of claim 1 , wherein the forming the write head core includes configuring the shape of the write head core to substantially conform to the shape of a flux generated by a coil structure surrounding the write head core.

5. The method of claim 1 , wherein the forming the write head core includes forming the longitudinal cross-section of the write head core substantially perpendicular to a down-track direction during operation of a transducer head.

6. The method of claim 5 , wherein the forming the write head core includes forming the shape of the write head core is configured to concentrate magnetic flux generated by the coil structure during operation of the write head to the first end.

7. The method of claim 5 , wherein the forming the write head core includes forming the coil structure is a multi-turn coil structure having a first end extending away from an ABS of the slider and a second end extending away from the ABS of the slider, the first end of the coil structure and the second end of the coil structure being away from each other along a cross-track direction of the slider.

8. The method of claim 5 , wherein the forming the write head core includes forming the coil structure proximate the ABS and the write head core.

9. The method of claim 1 , wherein the forming the write head core includes forming a plurality of write head core formations on the thin film wafer from a plurality of thin film write head core photo masks.

10. The method of claim 1 , wherein the forming the write head core includes forming the write head core from a single photo mask on a thin film wafer.

11. The method of claim 1 , wherein the wherein forming the write head core includes forming the longitudinal length of the write head core is substantially parallel to a cross-track direction of the slider.

12. The method of claim 1 , further comprising forming a coil structure located between the first end and the second end of the write head core.

13. A method comprising:
forming a thin film wafer;
forming a write head core on the thin film wafer using a single photo mask, the write head core having a longitudinal cross-section substantially perpendicular to an air bearing surface and substantially parallel to a cross-track direction; and
forming a near-field transducer near the write head core.

14. The method as claimed in claim 13 , wherein the forming a write head core on a thin film wafer includes configuring the write head core on the slider with a read head sensor.

15. The method as claimed in claim 13 , wherein the forming the write head core comprises forming a write head core having a substantially smooth curved surface without any sharp bends.

16. The method as claimed in claim 13 , further comprising configuring a multi-turn coil between a write pole and a return pole of the write head core.

17. The method as claimed in claim 13 , wherein forming the write head core comprises forming a first end operative to serve as a write pole and a second end operative to serve as a return pole.

18. The method as claimed in claim 13 , wherein the forming a first end operative includes forming a cross-sectional area of the first end operative substantially smaller than a cross-sectional area of the second end operative.

19. A method comprising:
forming a slider;
forming a write head core positioned proximate an end of the slider, the longitudinal axis of the write head core positioned substantially parallel with the cross-track direction and substantially perpendicular with the down-track direction; and
forming a write pole that is smaller in cross-sectional width compared to a cross-sectional width of a return pole end.

20. The method of claim 19 , further comprising forming a near field transducer (NFT) located near a write pole that is smaller in cross-sectional width compared to the cross-sectional width of a return pole end and a light source positioned in the slider configured to provide light energy to the NFT.

Assignees

• Seagate Technology Llc

Inventors

• Rivkin Kirill
• Tabat Ned
• Benakli Mourad
• Seigler Michael A

Classifications

• G11B5/312

  for reducing flux leakage between the electrical coil layers and the magnetic cores or poles or between the magnetic cores or poles · CPC title

• G11B5/1272 Primary

  Assembling or shaping of elements (G11B5/1278 takes precedence) · 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

• Y10T29/49048

  Machining magnetic material [e.g., grinding, etching, polishing] · 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