Head stack assembly with interleaved flexure tail bond pad rows
AssigneeWestern Digital (Fremont), LLC
InventorTzong-Shii Pan
Life of this patent
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Abstract
Flexure tails are provided for coupling heads of head gimbal assemblies to a flex cable in a disk drive. An exemplary flexure tail comprises a substrate including a non-straight edge defining a protruding portion and a recessed portion. The recessed portion includes a first number of bonding pads arranged in a primary row, and the protruding portion including a second number of bonding pads arranged in a secondary row. Flexure tails for up and down heads fit together to form a flexure tail assembly in which the respective secondary rows form a single row. Flexure tail assemblies are joined to the flex cable in disk drives of the invention.
Claims10
A head stack assembly comprising:
- a flexure tail assembly comprising
- an up head flexure tail including a first number of bonding pads arranged in an up head primary row and a second number of bonding pads, less than the first number of bonding pads, arranged in an up head secondary row;
- and
- a down head flexure tail including a third number of bonding pads arranged in a down head primary row and a fourth number of bonding pads, less than the third number of bonding pads, arranged in a down head secondary row;
- the secondary rows of the two flexure tails being generally aligned with one another to form a single row.
A disk drive comprising:
- a flex cable having at one end a flex cable connector including a preamp;
- and
- a head stack assembly including an up head, a down head, and a flexure tail assembly joined to the flex cable connector, the flexure tail assembly including
- an up head flexure tail coupled to the up head and including a first number of bonding pads arranged in an up head primary row and a second number of bonding pads, less than the first number of bonding pads, arranged in an up head secondary row;
- and
- a down head flexure tail coupled to the down head and including a third number of bonding pads arranged in a down head primary row and a fourth number of bonding pads, less than the third number of bonding pads, arranged in a down head secondary row;
- the secondary rows of the two flexure tails being generally aligned with one another to form a single row.
Dependencies are inferred from the claim text.