Head gimbal assembly having a radial rotary piezoelectric microactuator between a read head and a flexure tongue
AssigneeWestern Digital (Fremont), LLC
InventorNathan C. Emley
Life of this patent
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Abstract
A novel head gimbal assembly (HGA) includes a piezoelectric microactuator having a first side and an opposing second side. The first side includes a plurality of anchor regions that extend radially from a center point and are bonded to the gimbal tongue. The first side also includes a first plurality of non-bonded regions lying between the anchor regions. The second side includes a plurality of link regions that extend radially from the center point and are bonded to a top surface of the read head. The second side also includes a second plurality of non-bonded regions lying between the link regions. Each of the plurality of link regions is angularly spaced between two of the plurality of anchor regions.
Claims24
A head gimbal assembly (HGA) comprising:
- a read head having an air bearing surface and an opposing top surface;
- a load beam;
- a flexure attached to the load beam, the flexure including a tongue having a tongue major surface;
- a piezoelectric microactuator having a first side and an opposing second side, the first side facing and being generally parallel to the tongue major surface,
- wherein the first side comprises
- a plurality of anchor regions that extend radially from a center point, each of the plurality of anchor regions being bonded to the tongue, and
- a first plurality of non-bonded regions that are not bonded to the tongue, each of the first plurality of non-bonded regions lying between two of the plurality of anchor regions,
- and wherein the second side comprises
- a plurality of link regions that extend radially from the center point, each of the plurality of link regions being bonded to the top surface of the read head, and
- a second plurality of non-bonded regions that are not bonded to the top surface of the read head, each of the second plurality of non-bonded regions lying between two of the plurality of link regions, and
- wherein each of the plurality of link regions is angularly spaced between two of the plurality of anchor regions.
A head gimbal assembly (HGA) comprising:
- a read head having an air bearing surface and an opposing top surface;
- a load beam;
- a flexure attached to the load beam, the flexure including a tongue having a tongue major surface;
- a piezoelectric microactuator having a first side and an opposing second side, the first side facing and being generally parallel to the tongue major surface,
- the first side being bonded to the tongue major surface by a plurality of anchor regions that extend radially from a center point, the second side being bonded to the top surface of the read head by a plurality of link regions that extend radially from the center point,
- wherein each of the plurality of link regions is angularly spaced between two of the plurality of anchor regions, and
- wherein the piezoelectric microactuator comprises a plurality of suspended regions, each of the plurality of suspended regions being suspended between adjacent ones of the plurality of link regions and the plurality of anchor regions, and
- wherein each of the plurality of suspended regions does not contact the tongue and does not contact the read head.
Dependencies are inferred from the claim text.