US2016351213A1PendingUtilityA1

Apparatus and method having tdmr reader to reader shunts

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Assignee: WESTERN DIGITAL (FREMONT) LLCPriority: Dec 22, 2014Filed: Aug 11, 2016Published: Dec 1, 2016
Est. expiryDec 22, 2034(~8.5 yrs left)· nominal 20-yr term from priority
G11B 5/3977Y10T29/49032G11B 5/6094G11B 5/1272G11B 5/3912G11B 5/4886G11B 5/29G11B 5/115G11B 5/4976G11B 5/3951G11B 33/1493G11B 5/3163
44
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Claims

Abstract

A method of making a magnetic head is provided. The method includes forming a first read sensor and a first electrical contact formed with a first shunt region. The method further includes forming a first mid-shield layer on the first read sensor, the first mid-shield layer being electrically connected to the first electrical contact. Additionally the method also includes forming a second mid-shield layer over the first mid-shield layer. Further, the method also includes forming a second read sensor over the second mid-shield layer, the second read sensor having a second electrical contact formed with a second shunt region electrically connected to the first shunt region.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method of making a magnetic head, the method comprising:
 forming a first read sensor and a first electrical contact formed with a first shunt region;   forming a first mid-shield layer on the first read sensor, the first mid-shield layer being electrically connected to the first electrical contact;   forming a second mid-shield layer over the first mid-shield layer; and   forming a second read sensor over the second mid-shield layer, the second read sensor having a second electrical contact formed with a second shunt region electrically connected to the first shunt region.   
     
     
         2 . The method of  claim 1 , wherein the forming the first read sensor comprises:
 forming a read sensor area of the read sensor; and   forming the first electrical contact after the first read sensor has been formed.   
     
     
         3 . The method of  claim 1 , wherein forming the second electrical contact electrically connected to the second mid-shield layer comprises forming an electrically resistive layer between the first shunt region and the second shunt region. 
     
     
         4 . The method of  claim 3 , wherein the electrically resistive layer is formed to have an electrical resistance substantially equal to 10 kw. 
     
     
         5 . The method of  claim 1 , wherein the forming the first read sensor comprises:
 forming a first outer shield layer; and   forming the first read sensor over the first outer shield layer; and   wherein the method further comprises:
 forming a second outer shield layer over the second read sensor. 
   
     
     
         6 . The method of  claim 1 , wherein the forming the first electrical contact comprises forming the first shunt region in a region of the magnetic head to be removed during formation of an air bearing surface;
 wherein the forming the second electrical contact comprises forming the second shunt region in the region of the magnetic head to be removed during formation of the air bearing surface; and   further comprising forming the air bearing surface by removing the first shunt region, and the second shunt region.   
     
     
         7 . The method of  claim 1 , wherein forming the second read sensor further comprises for forming a third electrical contact formed with a third shunt region, and
 wherein the method further comprising:   forming a third mid-shield layer on the second read sensor, the third mid-shield layer being electrically connected to the third electrical contact;   forming a fourth mid-shield layer over the third mid-shield layer; and   forming a third read sensor over the fourth mid-shield layer, the third read sensor having a fourth electrical contact formed with a fourth shunt region electrically connected to the third shunt region.   
     
     
         8 . The method of  claim 7 , wherein forming the second electrical contact electrically connected to the second mid-shield layer comprises forming a first electrically resistive layer between the first shunt region and the second shunt region; and
 wherein forming the fourth electrical contact electrically connected to the fourth mid-shield layer comprises forming a second electrically resistive layer between the third shunt region and the fourth shunt region.   
     
     
         9 . The method of  claim 7 , wherein the forming the first read sensor comprises:
 forming a first outer shield layer; and   forming the first read sensor over the first outer shield layer; and   wherein the method further comprises:   forming a second outer shield layer over the third read sensor.   
     
     
         10 . The method of  claim 7 , wherein the forming the first electrical contact comprises forming the first shunt region in a region of the magnetic head to be removed during formation of an air bearing surface;
 wherein the forming the second electrical contact comprises forming the second shunt region in the region of the magnetic head to be removed during formation of the air bearing surface;   wherein the forming the third electrical contact comprises forming the third shunt region in a region of the magnetic head to be removed during formation of the air bearing surface;   wherein the forming the fourth electrical contact comprises forming the fourth shunt region in the region of the magnetic head to be removed during formation of an air bearing surface; and   further comprising forming the air bearing surface by removing the first shunt region, the second shunt region, the third shunt region, and the fourth shunt region.   
     
     
         11 . A method of assembling a storage drive comprising:
 forming a magnetic head using the method of  claim 1 ;   mounting the magnetic head on a slider arm; and   mounting the slider arm proximate to a storage medium.

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