Abstract: A semiconductor device, including: a first layer including first transistors; an interconnection layer overlying the first transistors, the interconnection layer providing interconnection for the first transistors; a bonding layer overlying the interconnection layer; a second layer overlying the bonding layer; and a carrier substrate for the transferring of the second layer, where the second layer includes at least one through second layer via, where the at least one through second layer via has a diameter of less than 100 nm, where the second layer includes a plurality of second transistors, and where the second layer is transferred from a donor wafer.