Patent ID: 8592299

Claim:
A method for mechanically and electrically joining a semi-insulating x-ray detector crystal to a circuitized substrate using hybrid electrical interconnects, each interconnect having a substantially pure solder portion nearest said substrate, a substantially pure electrically conductive adhesive (ECA) portion nearest said semi-insulating x-ray detector crystal, and a solder-ECA interface therebetween, the steps comprising: a) depositing an ECA onto a first set of electrically conductive pads of said semi-insulating x-ray detector crystal; b) depositing a solder onto a second set of electrically conductive pads of said circuitized substrate; c) initially reflowing said solder on said second set of electrically conductive pads; d) washing said reflow of said solder; e) aligning said first set of electrically conductive pads on said semi-insulating x-ray detector crystal with said second set of electrically conductive pads on said circuitized substrate; f) placing said semi-insulating x-ray detector crystal onto said circuitized substrate to combine corresponding deposits of said ECA and said solder; g) reflowing said solder subsequent to said placing step (f); and h) curing said ECA during said reflowing step (g), wherein said reflowing step (g) is performed with said ECA and without additional flux; i) forming an electrical bond with said first set of electrically conductive pads of said semi-insulating x-ray detector crystal, the reflowed solder of step (g) forming an electrical bond with said second set of electrically conductive pads of said circuitized substrate, and said solder and said cured ECA forming an electrical bond at the ECA-solder interface to complete a single electrical interconnect between said circuitized substrate and said semi-insulating x-ray detector crystal to form a detector assembly.