US Patent 10943792 3D stacked-in-recess system in package

A system in package device includes a landed first die disposed on a package substrate. The landed first die includes a notch that is contoured and that opens the backside surface of the die to a ledge. A stacked die is mounted at the ledge and the two dice are each contacted by a through-silicon via (TSV). The system in package device also includes a landed subsequent die on the package substrate and a contoured notch in the landed subsequent die and the notch in the first die form a composite contoured recess into which the stacked die is seated.