| 摘要 |
<p>A piezoelectric (PZT) microactuator 300 directly attached to a head slider 302, for mounting on a suspension for use as a third stage actuator in a hard disk drive, is fabricated from and comprises a single sheet of a piezoelectric material with the top and bottom covered with an electrically conductive material to form electrodes. The piezoelectric material is differential-poled so that one lateral portion 202 is poled in one direction and another lateral portion 204 is poled in the opposite direction. When a drive voltage is applied between the top and bottom electrodes, one portion of the piezoelectric material expands while the other portion contracts, thereby providing a rotational movement. The direction of motion of each respective portion is determined by the direction of the applied voltage and the respective direction of poling. An electric field may be applied by poling electrodes.</p> |
