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Thermal Relief in Protel

Discussion in 'CAD' started by Brendon, Aug 22, 2005.

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  1. Brendon

    Brendon Guest

    Hi All,

    I want to have a pad on the board with no thermal relief, connected to a
    plane. How do I do this in Protel 99 SE? Is there an option somewhere?

  2. Brendon,
    First you must be sure if it is a plane or a poured polygon,
    there are two different rules. Under DRC rules ("D", "R") go to
    the second tab ("Manufacturing") and find the appropriate
    connection rule for either Power Plane Connection Style or
    Polygon Connect style. Write a rule for your pad that you want
    directly connected and set the connection type to "Direct
    You could write the rule for your PAD using the Footprint/Pad
    specification or you could make a Pad class that contains that
    pad and write the rule using the pad class.
  3. Guest

    Guest Guest

    you'll have to create a new design rule under plane connects.
    Select the net and change the thermal relief type to direct connect.
    I am not sure if this will affect the whole net or if you can select one via
    or pin and change the scope of the rule.
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