Measuring and testing – Surface and cutting edge testing – Roughness
Patent
1999-02-18
2000-09-05
Raevis, Robert
Measuring and testing
Surface and cutting edge testing
Roughness
G01B 528
Patent
active
061125822
ABSTRACT:
A glide head that can be coupled to a mounting base via a load arm includes a gimbal. A slider is coupled to the gimbal and includes an air bearing surface having a downward protrusion. The distance between the protrusion and a disc under test is substantially insensitive to changes in a height measured from a bottom of the mounting base to an upper surface of the disc. Furthermore, the protrusion can have a distal end extending downward such that a distance from the distal end to the disc under test is less than a distance from every other surface of the slider to the disc during operation of the glide head. The glide head can have a fly height that is substantially constant. Therefore, the glide head can provide more accurate and more uniform detection of outwardly projecting defects on the surface of the disc.
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Sundaram Ramesh
Yao Wei H.
Raevis Robert
Seagate Technology Inc.
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