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  1. #1
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    How to glue a heat sink on a IC

    Hi All,

    I have to glue a heat sink on a chip which is getting super hot. The dimension are width 6.3mm and length. Anyone could recommend something to glue it?. I have though in thermal tape but it wont secure the heat sink enough...

    Thanks,
    Winsu
    Last edited by FvM; 20th February 2020 at 17:47. Reason: Moved to appropriate section

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    Re: How to glue a heat sink on a IC

    You can use epoxy glue. I presume, it's a plastic package without dedicated thermal interface. Don't expect strong cooling effect by the heat sink. Most heat will be dissipated through pins and PCB anyway.



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  3. #3
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    Re: How to glue a heat sink on a IC

    Yes, it is unfortunately the case. What other solutions could be done. Moving tracks and filled the area with copper?. Plated vias underneath of the chip?.



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    Re: How to glue a heat sink on a IC

    "Arctic Silver" epoxy is (or was) popular for PC CPU /
    GPU heat sink attach.

    What kind of package and how the heat flows, may
    be a concern. Putting the heat sink on a plastic package
    that has no thermal features (slug etc.) may still leave
    you an inferior thermal path. Look at heat spreaders
    as a means to "involve" more of the package surface
    if the sink is smaller than package outline (facing area
    from paddle and leadframe to sink, over plastic thickness,
    is the deal).



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    Re: How to glue a heat sink on a IC

    the package is a DFN-8 and the heat sink covers the whole thing ( it even standouts a bit) I have used araldite to glue the chip...Tomorrow I will run a test to see if it has improved...

    Any ideas on the layout?, what I could change in the layout to make it better?.



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