Head gimbal assembly with precise positioning actuator for read/write head and disk drive device with the head gimbal assembly

A head gimbal assembly comprising:

• a micro-actuator;
• a slider;
• and
• a suspension that supports the micro-actuator and slider,
• wherein the micro-actuator includes:
• a fixed portion connected to the suspension;
• a movable portion connected to the slider;
• a pair of frame ribs that interconnect the fixed portion and the movable portion;
• a PZT element mounted to each of the frame ribs, each PZT element being excitable to cause selective movement of the frame ribs which causes movement of the movable portion to cause movement of the slider;
• and
• a tongue fixed to and extending from the fixed portion, the tongue engaged with a pivot provided on the suspension,
• wherein the tongue forms a gap between the movable portion and itself.

A disk drive device comprising:

• a head gimbal assembly including a micro-actuator, a slider, and a suspension that supports the micro-actuator and slider;
• a drive arm connected to the head gimbal assembly;
• a disk;
• and
• a spindle motor operable to spin the disk,
• wherein the micro-actuator includes:
• a fixed portion connected to the suspension;
• a movable portion connected to the slider;
• a pair of frame ribs that interconnect the fixed portion and the movable portion;
• a PZT element mounted to each of the frame ribs, each PZT element being excitable to cause selective movement of the frame ribs which causes movement of the movable portion to cause movement of the slider;
• and
• a tongue fixed to and extending from the fixed portion, the tongue engaged with a pivot provided on the suspension,
• wherein the tongue forms a gap between the movable portion and itself.