Magnetic head device with microactuator fine motion device having electrode section molded out of resin
AssigneeAlps Electric Co., Ltd.
InventorMasayoshi Nakagawa
Life of this patent
Estimating the term…
Abstract
A magnetic head device including a slider, a resilient supporting member which supports the slider, and piezoelectric elements which are mounted on the resilient supporting member. The piezoelectric elements each include a piezoelectric layer and a pair of electrode layers, a first electrode layer and a second electrode layer. The surface of each second electrode layer and a stationary base end portion and a sliding portion are joined together through an electrically conductive adhesive resin, and both end portions of each piezoelectric element and the stationary base end portion and the sliding portion are joined together through a nonconductive adhesive resin.
Claims31
A magnetic head device comprising:
- a slider having provided thereat a reproducing element and a recording element, with the reproducing element being used to detect a magnetic signal recorded on a recording medium and a recording element being used to record a magnetic signal on the recording medium;
- a resilient supporting member which supports the slider;
- and
- a piezoelectric element, mounted on the resilient supporting member, to change a position of the slider by distorting the resilient supporting member;
- wherein the piezoelectric element has a piezoelectric layer and a pair of electrode layers which sandwich the piezoelectric layer;
- wherein the resilient supporting member has a stationary base end portion and a swinging portion, the swinging portion supporting the slider and connected to the stationary base end portion, and the swinging portion being swingable with respect to the stationary base end portion by the piezoelectric element;
- wherein, with one of the electrode layers of the piezoelectric element opposing the stationary base end portion and the swinging portion, the piezoelectric element is disposed on both the stationary base end portion and the swinging portion;
- and
- wherein a surface of the one of the electrode layers, the stationary base end portion, and the swinging portion are joined together through an electrically conductive adhesive resin, and both end portions of the piezoelectric element in directions in which the piezoelectric element expands and contracts, the stationary base end portion, and the swinging portion are joined together through a nonconductive adhesive resin.
A magnetic head device comprising:
- a load beam having a swinging portion and a stationary base portion separated by a gap, the stationary base portion having arms extending substantially in parallel with the swinging portion and connected with the swinging portion through resilient supporting portions;
- a slider mounted on an end of the swinging portion of the load beam;
- a plurality of piezoelectric elements spanning the gap and substantially in parallel with the arms, each piezoelectric element having a piezoelectric layer and a plurality of electrode layers that sandwich the piezoelectric layer, a lowermost electrode layer of the plurality of electrode layers attached to the stationary base portion and the swinging portion with an electrically conductive adhesive;
- and
- a non-conductive adhesive attached to the electrically conductive adhesive, the lowermost electrode layer, and the piezoelectric layer of each of the plurality of piezoelectric elements such that the non-conductive adhesive is disposed one of more proximate and more distal from the slider than the piezoelectric element to which the non-conductive adhesive is attached.
A method of increasing displacement of a slider disposed on a swinging portion of a resilient member comprising attaching each of a pair of piezoelectric elements to a stationary base portion and the swinging portion of the resilient member using both electrically conductive adhesive and non-conductive adhesive.
A magnetic head device comprising:
- a load beam having a swinging portion and a stationary base portion separated by a gap, the stationary base portion having arms extending substantially in parallel with the swinging portion and connected with the swinging portion through resilient supporting portions;
- a slider mounted on an end of the swinging portion of the load beam;
- a piezoelectric element spanning the gap and substantially in parallel with the arms, the piezoelectric element having a piezoelectric layer and a plurality of electrode layers that sandwich the piezoelectric layer, a lowermost electrode layer attached to the stationary base portion and the swinging portion with an electrically conductive adhesive;
- and
- a non-conductive adhesive attached to the electrically conductive adhesive, the lowermost electrode layer, and the piezoelectric layer such that the non-conductive adhesive is disposed more proximate to and more distal from the slider than the piezoelectric element.
A magnetic head device comprising:
- a slider;
- a resilient supporting member which supports the slider;
- and
- means for distorting the resilient supporting member, thereby changing a position of the slider;
- wherein the means for distorting the resilient supporting member is connected with the resilient supporting member through an electrically conductive adhesive and through a nonconductive adhesive.
Dependencies are inferred from the claim text.