Multilayer electrical devices comprising area bonding conductive adhesive preforms

An electronic device comprising at least two sheet materials positioned on top of each other along a Z-axis, with a top sheet material and a bottom sheet material, wherein each sheet material has a multiplicity of electrically conductive adhesive members having top surfaces, each of said members comprising an electrically conductive metal filler and being separated from each other by means of a non-conductive adhesive region having a top surface disposed between said conductive adhesive members, said conductive adhesive members and said nonconductive adhesive region being formed together to form an integral sheet material having planar top and bottom surfaces, each extending in two directions to form X-Y planes, said bottom planar surface being substantially flat and said top planar surface being formed in a manner so that the top surfaces of the conductive adhesive members extend beyond the top surface of the non-conductive adhesive region, wherein at least two conductive adhesive members in one sheet material are electrically connected in the X-Y plane by means of an electrically conductive material, and at least one conductive adhesive member from one sheet material is electrically connected to the at least one adhesive member in another sheet material along the Z-axis.