Patent ID: 6404600
Filing Date: 2002-06-11
Classification: G11B

Abstract:
An actuator arm mounted to a primary actuator for positioning a read/write head relative to a data storage disk, said arm comprising:an inboard portion attached to said primary actuator and having a longitudinal axis; an outboard portion attached to said read/write head; and a pair of secondary bimorph actuators connected between said inboard portion and said outboard portion and deflectable together in a common direction to translate said outboard portion along an at least nearly straight line transverse to said longitudinal axis of said inboard portion, said bimorph actuators each including a first portion and a second portion, each portion having an inboard piezoelectric layer and an outboard piezoelectric layer mounted longitudinally adjacent each other, each layer having electrical interfaces positioned to allow a voltage to be applied to each layer separately, each actuator being configured such that a voltage applied to the outboard piezoelectric layers will have a polarity opposite to that of a voltage applied to the inboard piezoelectric layers, such that each actuator can be deflected into an s-shaped beam.