Stripe height lapping control structures for a multiple sensor array

Patent metadata

Field	Value
Publication number	US-10460751-B2
Application number	US-201815988122-A
Country	US
Kind code	B2
Filing date	May 24, 2018
Priority date	Dec 4, 2014
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A method and system provide a storage device. A plurality of read sensor stacks for each reader of the storage device are provided. The read sensor stacks are distributed along a down track direction and offset in a cross-track direction. A plurality of electronic lapping guides (ELGs) are provided for the read sensor stacks. The read sensor stacks are lapped. Lapping is terminated based on signal(s) from the ELG(s).

First claim

What is claimed is:

1. A magnetic read transducer comprising:
a first read sensor;
a second read sensor;
a third read sensor;
a first electronic lapping guide associated with the first read sensor to control a stripe height of the first read sensor;
a second electronic lapping guide associated with the second read sensor to control the stripe height of the second read sensor; and
a third electronic lapping guide associated with the third read sensor to control the stripe height of the third read sensor,
wherein the first electronic lapping guide is connected to a common ground connector, and wherein the third electronic lapping guide is connected to a common pad.

2. The magnetic read transducer of claim 1 , wherein the first read sensor and the second read sensor are separated by a first distance, wherein the first electronic lapping guide and the second electronic lapping guide are separated by a second distance, and wherein the first distance is substantially same as the second distance.

3. The magnetic read transducer of claim 1 , wherein the first electronic lapping guide is connected to the second electronic lapping guide through a first via and the second electronic lapping guide is connected to the third electronic lapping guide through a second via.

4. The magnetic read transducer of claim 1 , wherein the first read sensor is separated from the second read sensor by a first internal magnetic shield and the second read sensor is separated from the third read sensor by a second internal magnetic shield.

5. The magnetic read transducer of claim 1 , wherein the first read sensor and the second read sensor are separated by a first distance in a down track direction and the second read sensor and the third read sensor are separated by a second distance in the down track direction, wherein the first read sensor, the second read sensor, and the third read sensor are offset from one another in a cross track direction that is perpendicular to the down track direction, and wherein a width of the first read sensor overlaps with a width of the second read sensor in the cross track direction, and wherein the width of the second read sensor overlaps with a width of the third read sensor in the cross track direction.

6. The magnetic read transducer of claim 1 , further comprising a first read shield and a second read shield, wherein the first read sensor, the second read sensor, and the third read sensor are between the first read shield and the second read shield in a down track direction.

Assignees

• Western Digital Fremont Llc

Inventors

• Rudy Steven C
• Beaudry Christopher L
• Li Shaoping

Classifications

• G11B5/3912

  Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields (G11B5/3916 takes precedence) · CPC title

• G11B5/3977

  from different information tracks · CPC title

• G11B5/3932

  Magnetic biasing films · CPC title

• G11B5/4886

  relative to rotating disc · CPC title

• G11B5/3909

  Arrangements using a magnetic tunnel junction · CPC title