Patent ID: 8304881

Claim:
A microelectronic assembly, comprising: a substrate having oppositely-facing first and second surfaces and at least one aperture extending between the first and second surfaces, the substrate having substrate contacts at the first surface and terminals at the second surface; a first microelectronic element having a front surface facing the first surface, a rear surface remote therefrom, and an edge extending between the front and rear surfaces, the first microelectronic element having a plurality of contacts at the front surface that face and are joined to corresponding ones of the substrate contacts; a second microelectronic element having a front surface facing the first microelectronic element, the second microelectronic element having a plurality of contacts exposed at the front surface thereof beyond the edge of the first microelectronic element, the second microelectronic element embodying a greater number of active devices to provide memory storage array function than any other function; and leads electrically connecting the contacts of the second microelectronic element with the terminals, the leads having portions aligned with the at least one aperture, wherein the first microelectronic element is configured to regenerate at least some signals received by the microelectronic assembly at the terminals and to transmit said signals to the second microelectronic element.