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Placing decoupling caps on the bottom side under the BGA

Peter Cerbone over 4 years ago

Hi,

I'm looking for a skill that would determine the BGA to be either 1mm or .8mm and then place the caps according.

I trying to speed up the process of placing these caps. The majority of boards I work on may have 6-8 BGAs on them.

Is this possible?

Thanks,

Peter

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eDave over 4 years ago

Certainly this would be possible. Ease of implementation would depend on whether the decoupling caps are easily identifiable (are they in the same room as the BGA) and consistency of the rules around where you want the caps placed. Pitch can be determined several ways.

This is one way: pin1DBID = car(symDBID ->pins), pitch = apply('min, mapcar(lambda((pin2DBID), axlDistance(pin1DBID ->xy, pin2DBID ->xy)), cdr(symDBID ->pins)))
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Peter Cerbone over 4 years ago in reply to eDave

Hi eDave,

I don't think the caps are in the same room as the BGA. I was hoping I can window select the caps I want to place under the BGA.

Thanks,

Peter
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Peter Cerbone over 4 years ago in reply to eDave

Hi eDave,

I don't think the caps are in the same room as the BGA. I was hoping I can window select the caps I want to place under the BGA.

Thanks,

Peter
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