Use of gold leads in lead overlaid type of GMR sensor

Details Use of gold leads in lead overlaid type of GMR sensor Use of gold leads in lead overlaid type of GMR sensor

2006-11-14

2006-11-14

Castro, Angel (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07136264

ABSTRACT:
A magnetic head including a lead overlaid read head component in which the electrical current passing through the overlaid passive regions of the sensor layers is reduced. The parts of the electrical leads that overlay the sensor layers are comprised of gold. The exceptional electrical conductivity of gold allows most sensor electrical current to flow through the overlaid leads and significantly reduces the amount of sensor electrical current that passes through the overlaid sensor layers. The operational characteristics of the read head are improved because the overlaid passive regions of the sensor layers do not contribute to the sensor signal. Noise and side reading effects are thereby reduced. In alternative embodiments of the present invention of gold is also used to overlay portions of the electrical leads that are away from the overlaid portions. This further reduces the sensor electrical current that passes through the overlaid sensor layers.

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