Patent ID: 8335054

Claim:
A head suspension having a load beam and a piezoelectric actuator, the piezoelectric actuator supporting a base part of the load beam and configured to displace a front end of the load beam in a sway direction, the head suspension comprising: the piezoelectric actuator having an actuator base and at least a piezoelectric element, the actuator base connected to the base part of the load beam and having at least an opening, the piezoelectric element attached to the opening and deforming in response to a voltage applied thereto to conduct displacement of the front end of the load beam; a circumferential edge of the opening to define the opening in the actuator base; a bottom receiver inwardly protruding from the circumferential edge to face the piezoelectric element so that a bottom gap is defined between the piezoelectric element and the bottom receiver in a thickness direction of the piezoelectric element; a circumferential side face of the piezoelectric element, facing the circumferential edge of the opening in a direction orthogonal to the thickness direction; a circumferential channel defined between the circumferential edge of the opening and the circumferential side face of the piezoelectric element; a nonconductive filler fitted into the circumferential channel to maintain a width of the circumferential channel; and a nonconductive adhesive part formed in the circumferential channel and the bottom gap, the part formed in the circumferential channel joining the circumferential edge of the opening to the circumferential side face of the piezoelectric element and the part formed in the bottom gap joining the bottom receiver to the piezoelectric element, wherein the nonconductive filler has a diameter that is equal to a gap defined by the circumferential channel in the direction orthogonal to the thickness direction so that the nonconductive filler contacts both the circumferential side face of the piezoelectric element and the circumferential edge of the opening or a diameter that is slightly smaller than the gap of the circumferential channel so that a difference between the diameter of the nonconductive filler and the gap of the circumferential channel is smaller than a difference between the gap of the circumferential channel and the bottom gap.