Patent ID: 8369047
Filing Date: 2013-02-05
Classification: G11B,Y10T

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 on both sides of the open section in a suspension width direction and connect the proximal end section and the distal end section, wherein the load bending part includes paired right and left elastic plates that have plate surfaces facing the disk surface and are disposed away from each other with the suspension longitudinal center line being sandwiched between them, the elastic plates having proximal ends connected to the distal end section and distal ends supporting a proximal side of the load beam part, wherein the flexure part includes a flexure metal plate welded to disk-facing surfaces of the load beam part and the supporting part, an insulating layer laminated on a disk-facing surface of the flexure metal plate, and a signal wiring laminated on a disk-facing surface of the insulating layer, wherein the flexure metal plate includes a load beam part-overlapped region that is overlapped with and welded to the disk-facing surface of the load beam part, a supporting part-distal side-overlapped region that is overlapped with and welded to the disk-facing surface of the distal end section between the paired elastic plates in the suspension width direction, a load bending part-corresponding part that connects the load beam part-overlapped region and the supporting part-distal side-overlapped region between the paired elastic plates in the suspension width direction, a supporting part-proximal side-overlapped region that is overlapped with and welded to the disk-facing surface of the proximal end section, a distal end side-center-support plate forming region that extends from the supporting part-distal side-overlapped region so as to be positioned within the open section, and a proximal end side-center-support plate forming region that extends from the supporting part-proximal side-overlapped region so as to be positioned within the open section in a state of being away from the distal end side-center-support plate forming region in the suspension longitudinal direction, wherein the insulating layer includes a load beam part-corresponding region, a load bending part-corresponding, a supporting part-distal side-corresponding region, a distal end side-center-support plate corresponding region, a proximal end side-center-support plate corresponding region and a supporting part-proximal side-corresponding region that are laminated on the disk-facing surfaces of the load beam part-overlapped region, the load bending part-corresponding part, the supporting part-distal side-overlapped region, the distal end side-center-support plate forming region, the proximal end side-center-support plate forming region and the supporting part-proximal side-overlapped region of the flexure metal plate, respectively, and further includes a connecting region that connects the distal end side-center-support plate corresponding region and the proximal end side-center-support plate corresponding region, wherein there are provided paired right and left first and second-distal side-metal plates that are fixed to the disk-facing surface of the distal end section, and there are also provided paired right and left first and second-proximal side-metal plates that are fixed to the disk-facing surface of the proximal end section, wherein each of the paired distal side-metal plates includes a distal end side-fixed region overlapped with and fixed to a portion of the disk-facing surface of the distal end section that is positioned on an outer side of the supporting part-distal side-overlapped region in the suspension width direction, and a distal end side-lateral-support plate forming region extending from the distal end side-fixed region so as to be positioned on an outer-side of the distal end side-center-support plate forming region in the suspension width direction within the open section, wherein each of the paired proximal side-metal plates includes a proximal end side-fixed region overlapped with and fixed to a portion of the disk-facing surface of the proximal end section that is positioned on an outer side of the supporting part-proximal side-overlapped region in the suspension width direction, and proximal end side-lateral-support plate forming region extending from the proximal end side-fixed region so as to be positioned on an outer side of the proximal end side-center-support plate forming region in the suspension width direction within the open section, wherein the first piezoelectric element has a distal side-end surface and a proximal-side end surface that face a proximal side-end surface of the distal end section and a distal side-end surface of the proximal end section, respectively, with end surface side-insulative adhesive agents being interposed, and also has a disk-facing surface whose distal side mounted on a first piezoelectric element-distal end side-support plate, which is formed by a distal end side-first width portion of the distal end side-center-support plate forming region that is positioned on one side in the suspension width direction and the distal end side-lateral-support plate forming region of the first-distal side-metal plate, with a distal side-insulative adhesive agent being interposed, and proximal side mounted on a first piezoelectric element-proximal end side-support plate, which is formed by a proximal end side-first width portion of the proximal end side-center-support plate forming region that is positioned on the one side in the suspension width direction and the proximal end side-lateral-support plate forming region of the first-proximal side-metal plate, with a proximal side-insulative adhesive agent being interposed, and wherein the second piezoelectric element has a distal side-end surface and a proximal-side end surface that face the proximal side-end surface of the distal end section and the distal side-end surface of the proximal end section, respectively, with end surface side-insulative adhesive agents being interposed, and also has a disk-facing surface whose distal side mounted on a second piezoelectric element-distal end side-support plate, which is formed by a distal end side-second width portion of the distal end side-center-support plate forming region that is positioned on the other one side in the suspension width direction and the distal end side-lateral-support plate forming region of the second-distal side-metal plate, with a distal side-insulative adhesive agent being interposed, and proximal side mounted on a second piezoelectric element-proximal end side-support plate, which is formed by a proximal end side-second width portion of the proximal end side-center-support plate forming region that is positioned on the other one side in the suspension width direction and the proximal end side-lateral-support plate forming region of the second-proximal side-metal plate, with a proximal side-insulative adhesive agent being interposed.