Patent ID: 8872318

Claim:
A microelectronic package, comprising: a subassembly including: a first substrate having a coefficient of thermal expansion (CTE) of eight parts per million per degree Celsius or less, the substrate having a first surface, a second surface opposite the first surface, and an aperture extending between the first and second surfaces thereof, the first surface having discrete first contacts and second contacts thereon, the first contacts having a pitch of 200 microns or less; a first microelectronic element having a front surface facing the first surface and first element contacts at the front surface joined to the first contacts; a second substrate underlying either the first or the second surfaces of the first substrate and electrically interconnected with the first substrate by wire bonds only to the second contacts extending through the aperture, the second substrate having terminals configured for electrically connection to a component external to the microelectronic package; a second microelectronic element electrically interconnected with the second substrate; and a monolithic encapsulant contacting the first and second microelectronic elements and the first and second substrates.