ABS design with soft bumper pads (SBP) for mitigating media damage and thermal erasure in hard disk drives (HDD)
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United States of America Patent
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Feb 13, 2018
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Feb 14, 2017
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Feb 14, 2017
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Abstract
A slider design for a hard disk drive (HDD) features an air-bearing surface (ABS) topography with soft bumper pads (SBP) formed proximally to corners of the leading edge and the trailing edge. The bumper pads are formed by a process that combines the use of a first photomask for subtractive etching of the ABS to form pedestals, followed by additive depositions onto the pedestals using a second lift-off photomask. The additive process deposits sequences of Si layers and diamond-like carbon (DLC) layers to produce a soft bumper pad that is energy absorbing and heat conducting, thereby protecting the recording media from surface damage and thermal erasures.
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