Patent ID: 6934127

Claim:
A precise positioning actuator provided with a base and a pair of movable arms capable of displacing in response to a drive signal applied to said actuator, said pair of movable arms extending from said base for holding a head slider with at least one head element in a space between said pair of movable arms, for precisely positioning said at least one head element, each of said pair of movable arms including an arm member being made of an elastic sintered ceramic and having substantially the same cross sectional shape from a root thereof to a top end thereof, a piezoelectric element formed on a side surface of said arm member and a bonding material stopper additionally formed on an inside surface of said arm member near its top end section, said bonding material stopper having tapered surfaces, side surfaces of said head slider being adhered to the inside surfaces of said arm members at said bonding material stopper and within regions between said bonding material stopper and top ends of said arm members.