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Apparatus is described for measuring the normal force required to pull a magnetic head slider away from a magnetic disk and thereby obtain a measure of the stiction forces.
English (United States)
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Normal Force Measurement Apparatus for Stiction Studies
Apparatus is described for measuring the normal force required to pull a
magnetic head slider away from a magnetic disk and thereby obtain a measure
of the stiction forces.
The magnetic head slider is mounted on a piezoelectric driver with a load cell
sandwiched between the driver and the slider. The suspension with a gimbal
mounted head slider is attached to a load cell such that the center of gravity of
the slider is coincident with the direction in which the normal pull force is applied.
This avoids any peeling of the slider during adhesion measurements. The
piezoelectric driver is energized to pull the magnetic head slider away from the
disk and the normal load is measured with the load cell. By measuring the
normal force before sliding motion is introduced between slider and disk, a
measure of the stiction forces can be obtained.