Method to improve crown sigma control of the slider in a hard disk drive
AssigneeSAE Magnetics (H.K.) Ltd.
InventorsNiraj Mahadev, Yugraj Aujla
Life of this patent
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Abstract
The sensitivity of the ABS shape of a suspension mounted slider to temperature variations can be greatly reduced if the backside of the slider is lapped to a smooth convex contour that is similar to the ABS shape, rather than to a planar shape, prior to mounting the slider on the suspension. When the backside surfaces of sliders are shaped in this manner, the size of changes in the crown height of the ABS shape due to temperature variations are greatly reduced and the ABS shapes are distributed more tightly, thereby increasing disk drive reliability.
Claims9
A method of forming suspension mounted sliders whose ABS shapes have a more tightly controlled distribution and a reduced thermal sensitivity comprising:
- providing a row bar including a plurality of sliders formed therein;
- forming a crowned convex ABS shape on said row bar;
- forming a smooth convex backside surface shape on said row bar;
- slicing said row bar to produce individual sliders, each of said sliders thereby having the smooth convex backside surface shape formed on said row bar;
- mounting each slider on a suspension and forming electrical connections thereto.
A suspension mounted slider having an ABS shape that is tightly controlled and has a reduced sensitivity to temperature induced variations comprising:
- a suspension;
- a slider mounted on said suspension, the backside surface of said slider having a smooth convex surface shape;
- electrical connections formed contacting said slider.
Dependencies are inferred from the claim text.