Write head core

Patent metadata

Field	Value
Publication number	US-9251814-B2
Application number	US-201314144125-A
Country	US
Kind code	B2
Filing date	Dec 30, 2013
Priority date	Mar 15, 2013
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

Implementations disclosed and claimed herein provide a 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. An apparatus comprising:
a write head core located in a slider, the write head core comprising:
a first end operative to serve as a write pole; and
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 apparatus of claim 1 , wherein the write head core includes a magnetic core of a tapered shape.

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

4. The apparatus of claim 1 wherein the shape of the write head core is configured to substantially conform to the shape of a flux generated by a coil structure surrounding the write head core.

5. The apparatus of claim 1 further comprising a coil structure located between the first end and the second end of the write head core.

6. The apparatus of claim 5 wherein 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 apparatus of claim 1 wherein the write head core is formed from a single photo mask on a thin film wafer.

8. The apparatus of claim 1 , wherein the longitudinal length of the write head core is substantially parallel to a cross-track direction of the slider.

9. The apparatus of claim 5 , wherein 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.

10. The apparatus of claim 1 , wherein the longitudinal cross-section of the write head core is substantially perpendicular to a down-track direction during operation of a transducer head.

11. The apparatus of claim 1 , wherein a plurality of write head core formations are formed on the thin film wafer from a plurality of thin film write head core photo masks.

12. The apparatus of claim 5 , wherein the coil structure is located proximate the ABS and the write head core.

Assignees

• Seagate Technology Llc

Inventors

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

Classifications

• 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

• Y10T29/49048

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

• G11B2005/0021

  Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal · CPC title

• 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