JP2548602B

A semiconductor chip module has semiconductor chips (12) each having contacts on its entire front face, and a multi-layered organic circuit board (15) having a small dielectric constant intermediate ceramic substrates (11) having the same thermal expansion coefficient as that of the semiconductor chip (12), each having contacts on its front and back faces corresponding to those of the semiconductor chip (12) and being electrically connected directly in a one to one relationship. The contacts on the semiconductor chip (12) and the corresponding contacts on the substrates (11) are connected by a solder, the contacts on the other of the substrate (11) and the corresponding contacts on the multi-layered ceramic circuit board (15) are connected by respective conductive pins (14) having a predetermined flexibility and rigidity through a predetermined gap therebetween. In this way there is the possibility of the relative displacement due to theremal expansion difference between the intermediate ceramic substrate (11) and the multi-layered organic circuit board (15).