US 8,477,457 B2Granted

Head-gimbal assembly with a suspension-lead pad having a form that is configured to inhibit formation of an inter-pad solder bridge

AssigneeHGST Netherlands B.V.

InventorsYuhsuke Matsumoto, Tatsumi Tsuchiya, Eiki Oosawa, Tatsushi Yoshida

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Abstract

A head-gimbal assembly (HGA) with a suspension-lead pad having a form that is configured to inhibit formation of an inter-pad solder bridge. The HGA includes a gimbal, a head-slider and a plurality of suspension-lead pads. The head-slider is coupled with the gimbal, and includes a plurality of head-slider pads. The plurality of suspension-lead pads is coupled with the plurality of head-slider pads by a plurality of solder bonds. A suspension-lead pad comprises a first lateral side, a second lateral side, a proximal side, disposed in proximity to a respective head-slider pad, and a distal side. A first width of the suspension-lead pad closer to the proximal side is substantially larger than a second width of the suspension-lead pad further from the proximal side than the first width. A disk drive including the HGA, and a head-slider with a head-slider pad having similar form to the suspension-lead pad are also provided.

Claims22

Dependent claims

A head-gimbal assembly (HGA) with a suspension-lead pad having a form that is configured to inhibit formation of an inter-pad solder bridge, said HGA comprising:

a gimbal;
a head-slider coupled with said gimbal, said head-slider comprising a plurality of head-slider pads;
and
a plurality of suspension-lead pads coupled respectively with said plurality of head-slider pads by a plurality of respective solder bonds, a suspension-lead pad of said plurality of suspension-lead pads comprising a first lateral side, a second lateral side, a proximal side, disposed in proximity to a respective head-slider pad, and a distal side, disposed distally from said respective head-slider pad;
wherein a first width of said suspension-lead pad closer to said proximal side is substantially larger than a second width of said suspension-lead pad further from said proximal side than said first width, wherein a second suspension-lead pad of said plurality of suspension-lead pads comprises a first lateral side of said second suspension-lead pad, and a second lateral side of said second suspension-lead pad;
and
wherein said first lateral side and said second lateral side of said second suspension-lead pad lie substantially along respective straight-line segments, and a straight-line segment corresponding to said first lateral side of said second suspension-lead pad is substantially parallel to a straight-line segment corresponding to said second lateral side of said second suspension-lead pad.

4 more elements

A head-slider with a head-slider pad having a form that is configured to inhibit formation of an inter-pad solder bridge, said head-slider comprising:

a slider;
a magnetic-recording head coupled with said slider, said magnetic-recording head comprising:
a write element configured for writing data to a magnetic-recording disk;
a read element configured for reading data from said magnetic-recording disk;
and
a plurality of head-slider pads, a head-slider pad of said plurality of head-slider pads comprising a first lateral side, a second lateral side, a proximal side, configured for being disposed in proximity to a respective suspension-lead pad, and a distal side, configured for being disposed distally from said respective suspension-lead pad;
wherein a first width of said head-slider pad closer to said proximal side is substantially wider than a second width of said head-slider pad towards said proximal side than said first width and includes a broadened portion more distal than said second narrower width of said head slider portion, wherein a distal portion of said head-slider pad configured for being disposed distally from said respective suspension-lead pad is configured with a broadened portion.

4 more elements

A hard-disk drive (HDD) including a HGA with a suspension-lead pad having a form that is configured to inhibit formation of an inter-pad solder bridge, said HDD comprising:

a magnetic-recording disk;
a disk enclosure comprising a disk-enclosure base;
a spindle motor affixed in said disk-enclosure base, for rotating said magnetic-recording disk;
an actuator arm;
and
a HGA attached to said actuator arm, said HGA comprising:
a gimbal;
a head-slider coupled with said gimbal, comprising:
a slider;
a magnetic-recording head coupled with said slider, said magnetic-recording head comprising:
a write element configured to write data to said magnetic-recording disk;
a read element configured to read data from said magnetic-recording disk;
and
a plurality of head-slider pads;
and
a plurality of suspension-lead pads coupled respectively with said plurality of head-slider pads by a plurality of respective solder bonds, a suspension-lead pad of said plurality of suspension-lead pads comprising a first lateral side, a second lateral side, a proximal side, disposed in proximity to a respective head-slider pad, and a distal side, disposed distally from said respective head-slider pad;
wherein a first width of said suspension-lead pad closer to said proximal side is substantially larger than a second width of said suspension-lead pad further from said proximal side than said first width;
wherein said HGA is configured to support said head-slider in proximity with a recording surface of said magnetic-recording disk when said magnetic-recording disk is rotated by said spindle motor, and said actuator arm is configured to be pivoted by a voice coil motor for accessing data on said magnetic-recording disk;
and
wherein widths of an end pair of pads comprising a respective head-slider pad and a respective suspension-lead pad disposed at an end of an array of respective head-slider pads and respective suspension-lead pads are configured with greater widths than corresponding widths of a pair of pads comprising a head-slider pad and a respective suspension-lead pad not disposed at an end of said array of respective head-slider pads and respective suspension-lead pads.

17 more elements

Dependencies are inferred from the claim text.