发明名称 |
Single sheet differential-poled piezoelectric microactuator for a hard disk drive |
摘要 |
A piezoelectric (PZT) microactuator directly attached to a head slider, 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 the electrodes. The piezoelectric material is differential-poled so that one lateral portion is poled in one direction and another lateral portion 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. |
申请公布号 |
US8810971(B1) |
申请公布日期 |
2014.08.19 |
申请号 |
US201313858716 |
申请日期 |
2013.04.08 |
申请人 |
HGST Netherlands B.V. |
发明人 |
Vitikkate Vipin Ayanoor;Hirano Toshiki |
分类号 |
G11B21/24 |
主分类号 |
G11B21/24 |
代理机构 |
|
代理人 |
Henkhaus John D. |
主权项 |
1. A piezoelectric microactuator configured for third stage actuation in a hard disk drive, said microactuator comprising:
a single sheet of piezoelectric material having a top surface, an opposing bottom surface, a first lateral portion and a second lateral portion, wherein the first lateral portion is poled in a first direction and the second lateral portion is poled in an opposing second direction; and a single first actuation electrode layer electrically coupled with the top surface and a single second actuation electrode layer electrically coupled with the bottom surface. |
地址 |
Amsterdam NL |