Patent ID: 6014586
Filing Date: 2000-01-11
Classification: A61N,H01L

Abstract:
An implantable cardiac stimulation device, comprising:electronic circuitry for generating cardiac stimulation pulses in at least one of the absence or presence of certain cardiac events, said electronic circuitry comprising:a first integrated circuit chip having a first array of signal contact pads disposed thereon;a second integrated circuit chip having a second array of signal contact pads disposed thereon;a substrate having a first predefined die-attach area located on a surface of said substrate, said first integrated circuit chip being mounted on said first predefined die-attach area on said surface, said substrate also having a first plurality of bond pads located thereon adjacent said first predefined die-attach area, said second integrated circuit chip being vertically stacked upon said first integrated circuit chip;a first plurality of wirebonds, each one of said first plurality of wirebonds extending between a selected one of said first array of signal contact pads to a selected one of said first plurality of bond pads providing electrical communication therebetween;a second plurality of wirebonds, each one of said second plurality of wirebonds extending between a selected one of said second array of signal contact pads to a selected one of said first plurality of bond pads providing electrical communication therebetween, wherein at least one of said first plurality of bond pads is commonly shared by one of said first plurality of wirebonds and at least one of said second plurality of wirebonds whereby electrical comminication is enabled between said first and second integrated circuit chips via said shared bond pads in said first plurality of bond pads;at least one additional circuit component extending between and electrically connected to two of said bond pads in said first pluralities of bond pads; anda housing for hermetically sealing said electronic circuitry therein.