Patent ID: 8686552

Claim:
A flip-chip, stacked-die electronic package assembly comprising: a base substrate including a planar base surface and a plurality of base contact pads disposed on the base surface; a first die and a second die disposed in an offset stacked arrangement with the first die located between the second die and the base substrate such that a planar first surface of the first die faces a planar second front surface of the second die such that an upper edge portion of the second front surface is exposed adjacent to a first peripheral side edge of the first die, wherein the first die includes a plurality of first die contact pads disposed on the first front surface, and wherein the second die includes a plurality of second die contact padsdisposed on the second front surface in said upper edge portion; and a plurality of single-curved interconnect springs, each said interconnect spring having a flat anchor portion and a curved body portion extending away from the anchor portion, and a tip portion disposed at the end of the body portion, wherein said plurality of interconnect springs include: a first interconnect spring extending between the substrate and the first die and connected such that the first interconnect spring forms a first electrical connection between a first base contact pad of said plurality of base contact pads and an associated first die contact pad of said plurality of first die contact pads, and a second interconnect spring extending between the substrate and the second die and connected such that the second interconnect spring forms a second electrical connection between a second base contact pad of said plurality of base contact pads and an associated second die contact pad of said plurality of second die contact pads.