Shorted magnetoresistive head elements for electrical overstress and electrostatic discharge protection

Abstract

Abstract In a magnetic read/write transducer, the elements of the magnetoresistive (MR) and inductive heads are shorted together and to the slider substrate to provide a low resistance, conductive path bypassing the MR sensor element and minimizing electrical current through the MR sensor element during discharge of static electric charge. The MR sensor element, the MR conductive leads, the MR magnetic shield elements and inductive pole tips exposed at the slider air bearing surface are shorted together and to the slider substrate by a layer of conductive material, such as tungsten, formed over the slider air bearing surface. The conductive layer shorts the head elements together and to the slider substrate thus protecting the head against ESD/EOS damage during subsequent handling and assembly. The conductive layer is removed by wet etching prior to placing the magnetic head into operation in a magnetic storage system.

Inventors

• 👤 Timothy S. Hughbanks
• 👤 Hin Pong E. Lee
• 👤 Peter B. P. Phipps
• 👤 Neil L. Robertson
• 👤 Albert J. Wallash

Bibliographic Details