Patent ID: 7223981

Claim:
A radiation detector assembly, comprising: a semiconductor detector array substrate, comprising CdZnTe or CdTe, having a plurality of detector cell pads on a first surface thereof said pads comprising a contact metallization and a solder barrier metallization; an interposer card, comprises a ceramic or polymer laminate printed circuit and having planar dimensions no larger than planar dimensions of the semiconductor detector array substrate, a plurality of interconnect pads on a first surface thereof, at least one readout semiconductor chip and at least one connector on a second surface thereof, each having planar dimensions no larger than the planar dimensions of the interposer card; solder columns that extend from contacts on the interposer first surface to the plurality of pads on the semiconductor detector array substrate first surface, said solder columns comprising at least one solder having a melting point or liquidus less than 120 degrees C.; and an encapsulating resin between said interposer circuit card first surface and the semiconductor detector array substrate first surface, encapsulating said solder columns, said encapsulating resin curing at a temperature no greater than 120 degrees C., such that said encapsulating resin at least partially cures at the same time as a process of reflowing said solder having the melting point or liquidus less than 120 degrees C., wherein the cured encapsulating resin provides mechanical stability to the solder joints having a melting point or liquidus less than 120 degrees C. connecting the semiconductor chip and interposer card by adding mechanical strength to the assembly.