Hardware Reference
In-Depth Information
Figure 3.70: In plane frequency response with a resonant peak at 14.7 kHz.
Figure 3.71: FEM model showing the movable part that has a 1st resonant
frequency at 15.4 kHz in the XZ plane.
pad with the PZT z-direction actuator that carries the head generates little
pressure even if the head approaches a disk surface. The recording element can
be raised and lowered on demand by applying a control voltage. Change in
flying height of some 70 nm was obtained at the cantilever tip with the control
voltage of 4 V [188], [189], [118], [119]. References [192] and [193] report the
fabrication process for the PZT thin film.
We note that the writing current induced variation in slider crown and
