Dynamic magnetic information storage or retrieval – Head mounting – For adjusting head position
Reexamination Certificate
2005-02-08
2005-02-08
Heinz, Allen (Department: 2653)
Dynamic magnetic information storage or retrieval
Head mounting
For adjusting head position
Reexamination Certificate
active
06853517
ABSTRACT:
A bidirectional electrostatic rotary microactuator has two sets of fixed electrodes, one set for driving the microactuator counterclockwise and the other set for driving it clockwise, and a rotatable frame that has movable electrodes attached to its outer wall and interleaved between the fixed electrodes. A layer of insulating material is located between the outer wall to which the movable electrodes are attached and the remainder of the frame so that the movable electrodes are electrically isolated. The frame is maintained at ground electrical potential and the movable electrodes at a fixed non-zero electrical potential. The microactuator is driven by applying a plus or minus voltage to one set of fixed electrodes and the opposite voltage to the other set, while maintaining the movable electrodes at a fixed non-zero voltage. The microactuator is usable as a secondary actuator in a disk drive for fine positioning the read/write head.
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Hirano Toshiki
Yang Henry Hung
Berthold Thomas R.
Heinz Allen
Hitachi Global Storage Technologies - Netherlands B.V.
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