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Thread: Stacking thermal interfaces?

  1. #1
    Associate Engineer
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    Jan 2013
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    Stacking thermal interfaces?

    Would thermal conduction improve if more than one thermal interface is used? For example, adding a thermal pad with a conductivity of 6 w/mk on top of another interface that has a conductivity of 80 w/mk. Are there any downsides of using more than one thermal interface besides extra material, cost, thickness, etc.

  2. #2
    Administrator Kelly Bramble's Avatar
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    Feb 2011
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    Bold Springs, GA
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    Welcome to EE!

    All thermal interfaces slow down the heat transfer. Try increasing the surface area conducting the heat or reducing the interface conductivity.
    Last edited by Kelly Bramble; 01-30-2013 at 01:45 PM. Reason: Clarify

  3. #3
    Technical Fellow
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    Feb 2011
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    Changing the color (black is better than white) and surface roughness (matte is better than shiny) too.

    Can you not replace the lower grade one with the higher grade?

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