Epoxy for heatsink

JohnR66

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Aug 1, 2007
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SW Ohio
I have a 16 pin DIP stereo amplifier IC. On one side, all the pins are dedicated to heatsinking. I don't have the room to provide adequate heatsinking on the board, so I want to epoxy a copper or aluminum plate to the IC itself to augment the heatsinking. I have two part clear epoxy. I wonder if it is adequate to use? Thermal conductivity is not paramount, but keeping the heatsink put is.
Thanks
 

DonShock

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Dec 28, 2005
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Belton Texas
I've used JB weld to pot both drivers and LEDs to heatsinks when I was out of the Arctic Silver adhesive. I've never noticed any degraded performance. As long as you keep the amount as small as possible, I would think the clear epoxy should work. The only drawback I can think of is the different material expansion rates of the chip and the sink. It's possible the flex between the parts could eventually crack the epoxy loose.
 
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