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Disclosed is a method for a low-cost centering wire bend for oversized clips on small heatsinks. Benefits include improved functionality, improved performance, and improved cost effectiveness.
English (United States)
This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
82% of the total text.
Method for a low-cost centering wire bend for oversized
clips on small heatsinks
Disclosed is a method for a low-cost centering wire bend for
oversized clips on small heatsinks. Benefits include improved functionality,
improved performance, and improved cost effectiveness.
Frequently, due to design constraints and reuse requirements in
high volume manufacturing environments, a heatsink ends up with a
smaller width (W) than the length of the wire clip (WC). When this occurs, the
heatsink can end up not centered or
retained on the part it is cooling.
Any structural discontinuities in the torsion rod region, such
as bends, lead to unwanted deflection profiles and reduction in the hold down
force. The wire is designed to be at
peak stress throughout the width of the
Conventionally, a proprietary heatsink clip is used that does a
poor job of centering the heatsink and a poor job of keeping it
The disclosed method
is a double catch elbow wire clip for use with small heatsinks. The clip centers the heatsink and restrain it during shock
and vibration (see Figure 1).
With the disclosed method, structural discontinuities (bends)
are possible and does not reduce the hold-down force in the leg region. The double elbow supplies the
alignment and retention to keep the heatsink in place without sacrificing hold-down force.