Seagate Technology Incorporated

Kevin David Powers

Dale Thomas Riley

Robert Matousek

Sandeep Bhushan

Prasanna Manja Ramakrishna

Scott Howard Deits

James J Martin

Vance Charles Kluver

The present application discloses detecting an asperity on a storage media surface using two amplitude threshold crossings of an asperity detection signal within a preset timing window. The present application further discloses a temperature-dependent resistive asperity sensor and a preamplifier that correlates a resistance change at the asperity sensor within a preset timing window to detect an asperity on a storage media surface. The asperity may be one or both of a void in the storage media surface and a protrusion from the storage media surface.

Storage media asperity characterization

The present application discloses a transducer head comprising a read element that reads data from a storage media and an asperity sensor that detects a dimension of an asperity on a surface of the storage media using a temperature change at the asperity sensor. The asperity may be one or both of a void in the surface of the storage media and a protrusion from the surface of the storage media.

Storage media asperity detection

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Longmont, CO, United States of America

Kevin David Powers