Hi All, Does anyone know the requirements to copper fill or epoxy fill a microvia? microvia is via in pad. Is there an alternative? I have a design that requires a fanout of 3.5 mil trace and 3mil airgap out of a finepitch bga. -oscar ____________________________________________________ oscar miguelino | lead pcb engineer | *OQO*, inc. 583 shotwell street | san francisco, ca 94110 *(this message constitutes confidential information proprietary to OQO, Inc.)*