US Patent 8228684 Multi chip electronic system

An electronic system adapted to perform a corresponding function and including at least a first subsystem and a second subsystem, the first subsystem and the second subsystem being operatively couplable to each other through a plurality of electric connections to perform the function of the system, in which the first subsystem and the second subsystem are respectively integrated on a first material chip and on a second material chip, the plurality of electric connections including a plurality of conductive through holes formed in at least one of the first and second chips and adapted to form a corresponding plurality of inter-chip electric connections when the first and the second chips are superimposed.