Seagate Technology Incorporated

Anoush M Fard

Joseph M Sampietro

Khosrow Mohajerani

Jeffrey G Barina

Muhammad A Hawwa

Richard G Krum

LeRoy A Volz

Tien Q Le

Daniel R Vigil

Zine-Eddine Boutaghou

Hossein M Moghadam

Alan David Berman

A system for loading a transducing head ( ) to a flying elevation proximate a rotating surface of a disc ( ) is disclosed. The system includes a piezoelectric device ( ) that is selectively expanded and contracted to control a height of the head ( ) on a flexure spring ( ) from the surface of the disc ( ). The system preferably includes control circuitry ( ) for generating electrical control signals to manage the expansion and contraction of the piezoelectric device ( ) according to operating characteristics of the disc ( ).

Piezoelectric head loading and unloading device for rigid disc drives

A system for positioning a transducing head in a disc drive device over a selected track of a rotatable disc includes an actuator arm which is rotatable about an axis, a head suspension mechanism connected to the actuator arm, and a slider carrying a transducing head and supported by the head suspension mechanism. A low resolution motor moves the actuator arm about the axis to effect coarse movement of the head between tracks of the disc. A piezoelectric element is embedded in the actuator arm to distort the arm to effect fine positioning of the head. Control circuitry distributes electrical signals to the low resolution motor and the piezoelectric element to selectively control movement thereof. The piezoelectric element is embedded in the actuator arm by removing a predetermined amount of material from the actuator arm and bonding the piezoelectric element in the resulting space in the actuator arm.

Method of making an actuator arm integrated piezoelectric microactuator

Noise effects in a disc drive having a disc on a rotating spindle in a housing are reduced by inducing vibrations in the housing of the disc drive that at least partially cancel a characteristic acoustic noise signal of the drive.

Active noise cancellation in disc drives

Bimorph piezoelectric microactuator head and flexure assembly

Actuator arm integrated piezoelectric microactuator

E-block head stack microactuator assembly

A disc drive has rotatable recording disc and a transducing head on a slider arranged to fly over a surface of the disc when the disc is rotated. The slider is supported by an actuator arm operatively coupled to an actuator motor to position the transducing head over a selected track of the disc. The slider is arranged to land on the disc surface when the disc is not rotated. Dithering means vibrates the slider when the slider is on the disc surface to reduce stiction between the slider and the disc surface thereby reducing the torque required to commence flying of the slider.

Dither microactors for stiction release in magnetic disc drives

A disc drive magnetic latch includes a magnet, a bucking coil, and a pair of pole pieces in a housing. The pole pieces have rectangular extension which extend through fingers in the housing thereby locking the pole pieces against rotational movement when a striker on the actuator strikes them. Heat staked tabs hold the assembly together.

Magnetic carriage latch for a disc drive

Growing community of inventors

Agoura Hills, CA, United States of America

Anoush M Fard