Magnetic Head Assembly with Magnetoresistive Sensor
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
A magnetic head having a magnetoresistive sensor 1 includes a magnetic shield 2 that also serves as a current-carrying bias conductor. The shield 2 is formed from a conductive magnetic material, such as permalloy. The height and thickness of the conductive shield are each at least two times that of the magnetoresistive sensor, so as to provide effective shielding of the magnetoresistive element and to maintain its high resolution characteristics. The length of the conductive shield is at least as long as the width of the active portion of the sensor to provide proper shielding and to enable a current that is parallel to the sensor for biasing.