A microelectronic assembly for packaging/encapsulating IC devices, which includes a crystalline substrate handler having opposing first and second surfaces and a cavity formed into the first surface, a first IC device disposed in the cavity and a second IC device mounted to the second surface, and a plurality of interconnects formed through the crystalline substrate handler. Each of the interconnects includes a hole formed through the crystalline substrate handler from the first surface to the second surface, a compliant dielectric material disposed along the hole's sidewall, and a conductive material disposed along the compliant dielectric material and extending between the first and second surfaces. The compliant dielectric material insulates the conductive material from the sidewall. The second IC device, which can be an image sensor, is electrically coupled to the conductive materials of the plurality of interconnects. The first IC can be a processor for processing the signals from the image sensor.
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