Dear Technos,

 

What is in your experience the minimum Cu-to-Cu clearance on the bottom
side that would eliminate shorts at wave?

 

Of course there are many shades of the question, like "it depends" on
whether via-to-via or annular ring-to-annular ring of pin hole (since
longer pins mean bigger clearance requirements), or it depends again on
RoHS vs. SnPb.

 

So, any figures that would eliminate the need for robber pads?

 

Or why not, could anybody elaborate on the good DfA practices for wave
soldering?

 

Thanks,

 

Ioan


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