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MAPBGA 121 Package Support PCB Mounting and Routing

Question asked by Carl Thomson on Mar 7, 2014
Latest reply on Mar 20, 2014 by Carl Thomson

Hi. I'm designing a PCB with the MAPBGA 121 package. The package has 0.25mm - 0.35mm diameter balls on 0.65mm spacing. Even with a 0.25mm solder pad on the PCB, this ball pitch is too small to allow room for through-vias. I'm not finding any supporting documentation on land pattern recommendations, or routing strategies. Anyone have any experience with this package?