Patent ID: 8351160
Filing Date: 2013-01-08
Classification: G11B

Abstract:
1. A magnetic head suspension comprising a load bending part that generates a load for pressing a magnetic head slider toward a disk surface, a load beam part that transmits the load to the magnetic head slider, a supporting part that supports the load beam part via the load bending part and is swung about a swing center directly or indirectly by a main actuator, a flexure part that is supported by the load beam part and the supporting part while supporting the magnetic head slider, and paired right and left piezoelectric elements that are attached to the supporting part so as to be symmetrical with each other with respect to a suspension longitudinal center line and have expansion and contraction directions different from each other, in order to enable micro motion of the magnetic head slider in a seek direction, wherein the supporting part includes a proximal end section that is directly or indirectly connected to the main actuator, a distal end section to which the load bending part is connected, an open section that is positioned between the proximal end section and the distal end section in a suspension longitudinal direction, and paired right and left connecting beams that are positioned outward of the open section in a suspension width direction and connect the proximal end section and the distal end section, wherein each of the paired first and second piezoelectric elements has a piezoelectric main body, and an upper electrode layer and a lower electrode layer that face each other with the piezoelectric main body being interposed between them, each of the first and second piezoelectric elements having a distal portion and a proximal portion that are directly or indirectly connected to the distal end section and the proximal end section, respectively, in a state where it is at least partially positioned within the open section in a plan view as viewed along a direction orthogonal to the disk surface while the lower electrode layer facing the disk surface, wherein the flexure part includes a flexure metal plate fixed to lower surfaces of the load beam part and the supporting part that face the disk surface, an insulating layer laminated on a lower surface of the flexure metal plate that faces the disk surface, and a conductor layer laminated on a lower surface of the insulating layer that faces the disk surface, wherein the insulating layer includes first and second piezoelectric element overlapped portions that are positioned within the open section and are overlapped with the first and second piezoelectric elements, respectively, in a plan view as viewed along the direction orthogonal to the disk surface, wherein the conductor layer includes a signal wiring having a proximal end capable of being electrically connected to an outside and a distal end capable of being electrically connected to the magnetic head slider, and a voltage supply wiring having a proximal end capable of being electrically connected to an outside, wherein the first and second piezoelectric element overlapped portions are formed with first and second connecting openings, respectively, that extend between the lower surfaces facing the disk surface and the upper surfaces opposite from the disk surface, and wherein there are provided, on the upper surface of the insulating layer, first and second lower conductive adhesive agents that electrically connect the lower electrode layers of the first and second piezoelectric elements to the voltage supply wiring through the first and second connecting openings, and a surrounding insulative adhesive agent that is arranged so as to surround the first and second lower conductive adhesive agents in a plan view.