Abstract: A package-on-package stacked microelectronic structure comprising a pair of microelectronic packages attached to one another in a flipped configuration. In one embodiment, the package-on-package stacked microelectronic structure may comprise a first and a second microelectronic package, each comprising a substrate having at least one package connection bond pad formed on a first surface of each microelectronic package substrate, and each having at least one microelectronic device electrically connected to the each microelectronic package substrate first surface, wherein the first and the second microelectronic package are connected to one another with at least one package-to-package interconnection structure extending between the first microelectronic package connection bond pad and the second microelectronic package connection bond pad.