This invention relates to a semiconductor device of a type wherein a semiconductor chip is directly bonded to a substrate and contact is established between them. The semiconductor device comprises the substrate in which fixing holes having a tapered portion are formed, the semiconductor chip having a tapered portion corresponding to the fixing hole and having devices formed thereon, coupling members for coupling the tapered portions of the substrate and the semiconductor chip in such a manner as to oppose to each other, a flattening layer formed in such a manner as to extend over the substrate and the semiconductor chip and wires electrically connected to said devices and at least part of which is formed on the flattening layer. According to this structure, positioning accuracy of the semiconductor chip can be improved easily and the wiring pitch can be reduced drastically.
