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Copper over footprint pins

Olek
I use Allegro/OrCAD PCB Editor for pcb design.

I have problems with irregularly shaped pins.

“Shapes” not always can be used to define padstack for such pins.

In such cases I have to add copper over the pins.

Example:

Vishay POWERPAK-1212-8 footprint requires exposed copper that overlaps partially two pins.

I would like to show 8 pins on the schematic part, so the footprint must have the same 8 pins.

I have added copper (etch) partially overlapping these pins.

I got DRC errors.

After I placed symbol on the board the DRC errors remained.
The question is: How to get rid of these errors?Can I do something with the copper to get rid of errors, or maybe I can turn off DRCs for the specific pins (or copper) on board level. Another example when I can't use "Shapes": Padstack pad that are “C” shaped with the pin origin located outside the shape (beyond the copper).

I think that routing to such pin will be impossible.
Parents
  • redwire

     Add the SMT pins.  Add a shape to the symbol that encompasses the pins. (you will need two shapes...)

    Build the schematic symbol such that the pins get the correct net name.

    The shape will take on the net name when it comes into the board.

    Be sure to consider the paste / soldermask you will need for the shape.

     

    If you get stuck post a zip with your schematic symbol and Allegro symbol...

Reply
  • redwire

     Add the SMT pins.  Add a shape to the symbol that encompasses the pins. (you will need two shapes...)

    Build the schematic symbol such that the pins get the correct net name.

    The shape will take on the net name when it comes into the board.

    Be sure to consider the paste / soldermask you will need for the shape.

     

    If you get stuck post a zip with your schematic symbol and Allegro symbol...

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