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Thermal Reliefs don't appear for thruholes

qwertyuser

Hello,
I'm using OrCAD 16.2's PCB editor to construct a simple board, mainly as a learning exercise. I wanted to create a thermal relief on a layer a plated through-hole passes through. The through hole belongs to a 6 pin connector, and it's suppose to touch the ground plane on pins 4 and 6 in the attached screenshot. However my padstack does not seem to be working, instead of there being an antipad a cross appears over the hole. Antipads are also not created for pins that should not be touching the ground plane pin 5 for example. Neither the thermal relief nor the antipad variables affect the layout at all, the only thing that seems to change anything in the layout is the regular pad variable.
The information dialog indicates that the blue plane is part of net 0 (which is correct).

The plane was laid as dynamic copper, and declared to be part of the ground net. When highlighting the ground plane, the correct pins light up but thermal reliefs just do not apper.

Screenshot

I've been struggling with this problem for the past 2 days, someone please help.

 

Edit: Here's another screenshot, the crosses that appear over the through holes should be thermal reliefs.

Parents
  • redwire

    There's a lot buried in the user manuals -- you might search "negative planes" and see what hits you get.

    It seemed as though you were describing a thermal flash symbol which is only used with negative planes. Try removing the thermal flash symbol in the padstack if you're going to use positive.


    I do all of my designs with negative power planes....

Reply
  • redwire

    There's a lot buried in the user manuals -- you might search "negative planes" and see what hits you get.

    It seemed as though you were describing a thermal flash symbol which is only used with negative planes. Try removing the thermal flash symbol in the padstack if you're going to use positive.


    I do all of my designs with negative power planes....

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