Patent ID: 7485951

Claim:
A circuit module comprising: (a) an integrated lower stack element comprising; an integrated circuit die having a plurality of die connective sites; a flexible circuit having first and second conductive layers, the flexible circuit being disposed in part beneath and affixed to and connected with the integrated circuit die to form a die-flex combination; and a protective structure set about the die-flex combination to cover at least a portion of the die and at least a portion of the flexible circuit and create a body having an upper surface above which are placed portions of the flexible circuit; and (b) an upper IC element having a plurality of upper IC contacts, the upper IC element being disposed in stacked conjunction with the integrated lower stack element, the upper IC element and integrated lower stack element being connected through the flexible circuit; wherein the flexible circuit further comprises: an intermediate layer between the first and second conductive layers, the second conductive layer having demarked first and second flex contacts, the second flex contacts being accessible through windows formed through the first conductive layer, and the intermediate layer, the first flex contacts in electrical connection with the upper IC element and the second flex contacts in electrical connection with the integrated circuit die.