Collocated rotating flexure microactuator for dual-stage servo in disk drives

An actuator arm for a disk drive comprising:

• an arm beam having first and second ends, and having a primary actuator for coarse positioning of a read,/write head at said first end, and a head gimbal assembly at said second end, said head gimbal assembly including:
• a flexure having a stationary portion and at least one movable portion, a portion of said flexure being attached to the load beam;
• a slider including, a read/write head, said slider being attached to one of said at least one movable portions of said flexure;
• a load beam providing a center of rotation for said slider;
• and
• at least one microactuator which connects between said stationary portion of said flexure and said at least one movable portion for applying a moment which causes pure or nearly pure rotation of said slider about said center of rotation.

A disk drive with collocated secondary position actuation comprising:

• a case including at least one rotatable data storage disk having data tracks;
• one or more actuator arms, each arm having a primary actuator for coarse positioning of said actuator arm relative to said data tracks, and a head gimbal assembly using secondary collocated actuation;
• said head gimbal assembly including:
• a flexure having a stationary portion and at least one movable portion, a portion of said flexure being attached to the load beam;
• a slider including a read/write head, said slider being attached to one of said at least one movable portions of said flexure;
• a load beam providing a center of rotation for said slider;
• and
• at least one microactuator which connects between said stationary portion of said flexure and said at least one movable portion for applying a moment which causes pure or nearly pure rotation of said slider about said center of rotation.

A head gimbal assembly for providing secondary collocation actuation for a disk drive, comprising:

• a flexure having a tongue which includes a stationary portion and at least one movable portion, said at least one movable portion including a proximal movable portion and a distal movable portion which are connected by at least one hinge;
• a slider including a read/write head, said slider being attached to said proximal portion of said flexure tongue;
• said slider is attached to, and said projecting dimple of said load beam contacts said proximal portion to form said center of rotation.
• a load beam providing a dimple which projects from said load beam and which acts as a center of rotation for said slider;
• and
• at least one microactuator which connects between said stationary portion of said flexure and said at least one actuator connects said stationary portion of said flexure tongue to said distal portion so that when said at least one actuator is activated, movement is applied to said distal portion and then coupled to said proximal portion to create pure or nearly pure rotation of said slider about said center of rotation.