The heat sink is mounted to the board by spring loaded
push-pins. The compression load from the springs applies
the appropriate mounting force for the heat sink and generates
the pressure required for proper thermal interface material
- Springs apply preferable compression load to the solder balls
instead of undesirable tension or shear.
- Higher performance thermal interface materials like
grease or phase change material can be used instead of
tapes or adhesives.
- Rework is easier when compared to heat sinks attached
by tapes or adhesives.
PCB Board Holes
A minimum of 2 through holes are required in the board. The hole diameter must be 2.500mm or 3.175mm, depending
on push pin selection.
Push Pin Speficitaion
Please visit Spring Selection page.
The installation procedure is as follows:
- Gently place the heat sink on the chip,
while aligning the pins with the board holes.
- Place one hand on top of the heat sink to prevent
the heat sink from tilting while installing the pins.
- While maintaining moderate pressure to the heat sink
with one hand, snap the pins through the board with the other hand.
Snap the pins through one at a time. Ensure the pins snap
completely through the board. However, do not apply excessive force,
or the spring may fully compress, applying all of the application
force to the chip.
- If more than two pins are used, install the pins in an
alternating, crisscross pattern.
The removal procedure is as follows:
- Access to the backside of the board is required for removal.
This may require that the board is removed from the chassis/system.
- Compress the split ends of the push pins, while gently pulling on the
pin from top side of the board. Use of a small pair of pliers may make
it easier to compress the end of the pins. However, do not use a pair
of pliers with a serrated edge, as this may damage the pins. Do not
overcompress the split end of the pins, just enough force to get the
split end to snap back into the hole is required.
Although the push pin attachment is reworkable, we do not recommend using the same
pins for multiple installations/removals. The pin ends may become deformed after
multiple uses. Additional pins can be ordered as spares.