We have an 8 layer board that we need to turn into a 10 layer board.  We have adjusted our layer stackup to accommodate the extra layers without any significant change in overall thickness, but we are still having trouble fitting everything we need onto the layout. 
What are the implications of going from a minimum .012" via to a 0.010" via?  What do we need to take into consideration?  What things might be critical to spec to the board fab house?

Genny Gibbard (mailto:[log in to unmask])

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