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Making a Top and Bottom heatsink w/connecting mounting holes.

dta116

I need a heatsink on both sides of a board connected by 3 mounting holes. They need to be either bare solder or bare copper (probably polygons). I cannot understand how to do define the polygons to be bare or solder with no masking and include the through holes connecting the top and bottom sides.

 

Thank you for your support.

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    On 10/12/2013 11:31 AM, Dave Taylor wrote:

    I need a heatsink on both sides of a board connected by 3 mounting

    holes. They need to be either bare solder or bare copper (probably

    polygons). I cannot understand how to do define the polygons to be bare

    or solder with no masking and include the through holes connecting the

    top and bottom sides.

     

    Thank you for your support.

     

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    Add polygons to mask layers.

    One thing is that shiny unmasked pcb has a lower emissivity then the

    solder mask coating.

    You should only remove the mask where you are mounting the tab or heat

    sinks to the PCB.

    Paul R