Detection of asperities in recording surface of storage medium
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United States of America Patent
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May 4, 1999
Grant Date -
N/A
app pub date -
Jun 3, 1996
filing date -
Feb 20, 1996
priority date (Note) -
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Abstract
A tester for use in detecting asperities in a disc surface of a storage system includes a load arm having a proximal end and a distal end. The distal end of the load arm is positioned adjacent the disc surface. A slider is carried on the distal end of the load arm adjacent the disc surface. A thermal sensor is coupled to the slider and provides an electrical output in response to a thermal input due to interaction between the thermal sensor and asperity on the disc surface. Detection circuitry coupled to the thermal sensor detects the electrical output from the thermal sensor and responsively provides a detection output indicating the occurrence of an asperity on the disc surface.
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