Abstract: A three-dimensional multi-chip module is formed as a stack of two-dimensional multi-chip modules comprising substrates which have electrically signal paths connecting integrated circuit chips and has vertical interconnections of the signal paths, provided by interconnection or via chips. The individual chips or other inner components on a substrate are in mechanical contact with a surface of an adjacent substrate and constitute the distance device maintaining the substrates spaced from each other. Thus heat developed in components can be conducted essentially perpendicularly to the substrates. Thermally conducting chips can be used for improving the conducting of heat. Cooling devices are located only at the top and bottom surfaces of the stack.