Suspension for disc drive with insulating cover film on piezoelectric element
AssigneeNHK Spring Co., Ltd.
InventorsTetsuya Fujiwara, Kenichi Takikawa
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Abstract
A suspension comprises a load beam fitted with a flexure, an actuator base including a base plate, a hinge member thinner than the base plate, and a pair of piezoelectric ceramic elements. The piezoelectric ceramic elements displace the distal end portion of the load beam in a sway direction when supplied with voltage. Each piezoelectric ceramic element is stored in an opening portion in the actuator base. An electrical insulating cover film is pasted on each piezoelectric ceramic element. The cover film covers the opposite side faces of each piezoelectric ceramic element. The opposite end faces of each piezoelectric ceramic element are covered with an adhesive agent that fixes the element to the actuator base.
Claims16
A suspension for a disc drive, comprising:
- a load beam provided with a flexure;
- an actuator base provided on a proximal portion of the load beam;
- a plate-like piezoelectric ceramic element, lying in a plane, mounted on the actuator base and adapted to be distorted to displace the load beam when voltage is applied thereto;
- and
- a cover film formed of an electrical insulating material and attached to at least side faces, including cut surfaces, of the piezoelectric ceramic element so as to cover the side faces, thereby preventing generation of particles from the side faces, the cut surfaces being substantially non-parallel to the plane of the plate-like piezoelectric ceramic element.
Dependencies are inferred from the claim text.