# US 2014/0153134 A1 · Writer with protruded section at trailing edge

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0153134 A1
- Document ID: US20140153134A1
- Status: Published application
- Kind: A1
- Application number: 13/705,984
- Filed: 2012-12-05
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Assignees: Seagate Technology LLC
- Applicants: Seagate Technology LLC
- Inventors: Xifeng Han; Jason Bryce Gadbois; Kaizhong Gao; Arkajyoti Misra; Harry Sam Edelman
- Web page: https://patentgrep.com/patent/US20140153134A1

## CPC

- G11B 5/012: Recording on, or reproducing or erasing from, magnetic disks (G11B17/00, G11B19/00 take precedence)
- G11B 5/1278: {specially adapted for magnetisations perpendicular to the surface of the record carrier}
- G11B 5/187: Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features (G11B5/265, {G11B5/29} , G11B5/31 take precedence)
- G11B 5/3116: {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)}
- G11B 5/3146: {magnetic layers}
- G11B 5/315: {Shield layers on both sides of the main pole, e.g. in perpendicular magnetic heads}
- G11B 5/4886: {relative to rotating disc}
- G11B 5/746: {Bit Patterned record carriers, wherein each magnetic isolated data island corresponds to a bit}
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A writer includes a leading edge, a trailing edge, a longitudinal axis defined between the leading and trailing edges, and a transverse axis orthogonal to the longitudinal axis. A writer region is provided at a protruded section of the trailing edge oriented along the longitudinal axis. A write pole is arranged at the protruded section to write data to two locations spaced apart from one another relative to the transverse axis for a range of skew angles.

## Claims

### Claim 1

A writer, comprising:
a leading edge, a trailing edge, a longitudinal axis defined between the leading and trailing edges, and a transverse axis orthogonal to the longitudinal axis;
a writer region provided at a protruded section of the trailing edge oriented along the longitudinal axis; and
a write pole arranged at the protruded section and configured to write data to two locations spaced apart from one another relative to the transverse axis for a range of skew angles.

### Claim 2 (depends on 1)

The writer of claim 1, wherein the write pole is arranged at the protruded section and configured to write data to two locations spaced apart in a staggered relationship for the range of skew angles.

### Claim 3 (depends on 1)

The writer of claim 1, wherein the protruded section comprises a curved section.

### Claim 4 (depends on 1)

The writer of claim 1, wherein the protruded section comprises a polygonal shaped section.

### Claim 5 (depends on 1)

The writer of claim 1, wherein the write pole is arranged at the protruded section and configured to write data to at least two space-apart arrays of magnetic islands of a magnetic recording medium.

### Claim 6 (depends on 1)

The writer of claim 1, wherein the write pole is arranged at the protruded section and configured to write data to at least two staggered space-apart arrays of magnetic islands of a magnetic recording medium.

### Claim 7 (depends on 1)

The writer of claim 1, wherein writing data at different skew angles within the range of skew angles by the write pole arranged at the protruded section compensates for timing modulation at the different skew angles.

### Claim 8 (depends on 1)

The writer of claim 1, wherein respective distances defined between the write pole and each of two consecutively written longitudinally spaced locations remain substantially equal at each skew angle of the range of skew angles.

### Claim 9 (depends on 1)

The writer of claim 1, wherein the protruded section comprises a center that can be oriented along a centerline of a track of data locations for the range of skew angles.

### Claim 10 (depends on 1)

The writer of claim 1, wherein the range of skew angles is at least about +/−15 degrees.

### Claim 11 (depends on 1)

The writer of claim 1, wherein the range of skew angles is at least about +/−18 degrees.

### Claim 12 (depends on 1)

The writer of claim 1, wherein the protruded section comprises two arcuate shaped sections.

### Claim 13 (depends on 12)

The writer of claim 12, wherein:
the protruded section comprises a left side and a right side;
one of the two arcuate shaped sections is located at the left side; and
the other of the two arcuate shaped sections is located at the right side.

### Claim 14

A transducer, comprising:
a slider comprising an air bearing surface;
a reader provided on the slider, at least a portion of the reader defined on the air bearing surface; and
a writer provided on the slider, at least a portion of the writer defined on the air bearing surface and comprising:
a leading edge, a trailing edge, a longitudinal axis defined between the leading and trailing edges, and a transverse axis orthogonal to the longitudinal axis;
a writer region provided at a protruded section of the trailing edge along the longitudinal axis; and
at least one write pole arranged at the protruded section and configured to write data to two locations spaced apart from one another relative to the transverse axis for a range of skew angles.

### Claim 15 (depends on 14)

The transducer of claim 14, wherein the protruded section has a generally arcuate or semicircular shape.

### Claim 16 (depends on 14)

The transducer of claim 14, wherein the protruded section has a generally polygonal shape.

### Claim 17 (depends on 14)

The transducer of claim 14, wherein the at least one write pole is arranged at the protruded section and configured to write data to two staggered space-apart arrays of magnetic islands of a magnetic recording medium.

### Claim 18 (depends on 14)

The transducer of claim 14, wherein writing data at different skew angles within the range of skew angles by the at least one write pole arranged at the protruded section compensates for timing modulation at the different skew angles.

### Claim 19 (depends on 14)

The transducer of claim 14, wherein respective distances defined between the at least one write pole and each of two consecutively written longitudinally spaced locations are substantially the same at each skew angle of the range of skew angles.

### Claim 20 (depends on 19)

The transducer of claim 19, wherein attaining substantially the same respective distances reduces or substantially eliminates timing variation in writing data to the two consecutively written longitudinally spaced locations.

### Claim 21

A method, comprising:
moving a writer through a range of skew angles, a trailing edge of the writer comprising a protruded section with at least one write pole; and
maintaining respective distances defined between the at least one write pole and each of two consecutively written longitudinally spaced locations, wherein the distances are substantially the same at each skew angle of the range of skew angles.

### Claim 22 (depends on 21)

The method of claim 21, wherein the protruded section comprises a center that can be oriented along a centerline of a track of data locations for the range of skew angles.

### Claim 23 (depends on 21)

The method of claim 21, wherein the range of skew angles is at least about +/−10 degrees.

### Claim 24 (depends on 21)

The method of claim 21, wherein the range of skew angles is at least about +/−18 degrees.