Abrading – Precision device or process - or with condition responsive... – With indicating
Reexamination Certificate
2006-12-26
2006-12-26
Morgan, Eileen P. (Department: 3723)
Abrading
Precision device or process - or with condition responsive...
With indicating
C451S010000, C451S011000, C451S041000, C451S317000, C360S122000, C360S235400, C073S105000, C029S603160, C029S090010
Reexamination Certificate
active
07153192
ABSTRACT:
A method for selectively sensing and removing asperities from the surface of hard disk drive media is disclosed. A thermally controlled flying height burnish slider is flown on a test stand with its thermal flying height control deactivated. The burnish slider flies at a nominal flying height over the surface of the media to remove any existing loose particles from the surface. A glide slider coupled to a PZT sensor is then flown over the surface of the media, the PZT sensor head mapping locations of any asperities on the surface of the media. The thermal flying height controlled burnish slider is next flown over the surface of the media with the thermal flying height control activated. The thermal flying height control is actuated when a mapped location of an asperity on the surface is proximate to the burnish slider, causing the burnish slider to protrude, wearing off the asperity.
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Kurita Masayuki
Pit Remmelt
Saegusa Shozo
Shiramatsu Toshiya
Suk Mike
Hitachi GLobal Storage Netherlands B.V.
Morgan Eileen P.
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