Patent ID: 7211884

Claim:
In an implantable medical device, a high density microelectronic package, comprising: a primary substrate made of thin, highly flexible and foldable, high dielectric strength material, the primary substrate having a top side and a bottom side with a plurality of conductive and non-conductive interconnect layers therebetween, the primary substrate having die attach pads on the top side, each die attach pad having a plurality of wire bond pads therearound, each wire bond pad being connected to the conductive interconnect layers according to circuit function; a plurality of chip-and-wire VLSI circuit chips mounted on the die attach pads, each VLSI circuit chip have a plurality of contact pads formed on a top surface thereof; and a plurality of gold wire bonds that electrically connect the plurality of contact pads to a respective wire bond pad; wherein each of the wire bond pads has about 50 micro-inches of gold plating thereon; and wherein the primary substrate comprises a fold area and wherein the primary substrate is adapted to be folded at the fold area to vertically integrate the primary substrate; and wherein the primary substrate comprises a first assembly area and a second assembly area, wherein the primary substrate is folded at the fold area to vertically integrate the first assembly area with the second assembly area, and wherein the first assembly area is connected with the second assembly area only at the fold area.