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SPIN VALVE/GMR SENSOR WITH CURRENT FLOW OUT OF THE SENSOR PLANE

IP.com Disclosure Number: IPCOM000013344D
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2003-Jun-18
Document File: 1 page(s) / 34K

Publishing Venue

IBM

Related People

HS GILL: AUTHOR

Abstract

In GMR sensors current usually flows in the plane of the sensors. It is known that magnetoresistance improves noticeably for current flow perpendicular to the sensor plane (CPP configuration). However, CPP configuration provides very low resistance and therefore not useful for magnetic head application. A GMR sensor design is disclosed here which provides current flow at an angle to the sensor plane. The electrode connections are made so that one electric lead contacts the top edge of the sensor the other electric lead contacts the bottom of the opposite edge of the sensor. This configuration thus provides current flow at an angle to the sensor plane. This configuration provides higher magnetoresistance but also provides more reasonable value for the sensor resistance. 1

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SPIN VALVE/GMR SENSOR WITH CURRENT FLOW OUT OF THE SENSOR PLANE

In GMR sensors current usually flows in the plane of the sensors. It is known that magnetoresistance improves noticeably for current flow perpendicular to the sensor plane (CPP configuration). However, CPP configuration provides very low resistance and therefore not useful for magnetic head application. A GMR sensor design is disclosed here which provides current flow at an angle to the sensor plane. The electrode connections are made so that one electric lead contacts the top edge of the sensor the other electric lead contacts the bottom of the opposite edge of the sensor. This configuration thus provides current flow at an angle to the sensor plane. This configuration provides higher magnetoresistance but also provides more reasonable value for the sensor resistance.

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