Electrical – Unable to change package footprint solder pad size in eagle

eaglefootprintlayoutpcb

as the image shows, I want to change the BGA soldering dots from current size to something larger. Only size changes, or shall we say diameter changes, no shape or anything, but I couldn't.

I clicked change tool, entered the new diameter (and I'm sure it's different than the original) and then clicked the pads I wanted to change, nothing happens.

Can someone please help? Thank you.

enter image description here

Best Answer

Looking at it your footprint uses a circle drawn on the tstop layer which is why you see diameter setting when you look at info.

The pad itself is actually an SMD pad, which does not have a diameter setting. Instead it has two key properties:

  • SMD Size which changes the overall size of the copper pad
  • roundness which will be set to 100% (i.e. circle - 0% would be square)

So to change the size, leave the roundness set at 100%, and change the SMD size setting, making sure to keep both the width and length of the pad the same.

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