Structure of chip on chip mounting preventing crosstalk noise

摘要

The present invention is intended to solve a problem of crosstalk noise in a so-called system module, which occurs as a result of interference between signals running in each of respective wiring layers of a first semiconductor chip and a second semiconductor chip stacked surface to surface with a small gap, and invites malfunctioning of semiconductor devices. As shown in Fig.1, the semiconductor device comprises a first semiconductor chip 1 having a first electrode pad 2 and a first wiring layer 9 in the main surface, a second semiconductor chip 5 having a second electrode pad 6 located at a corresponding place and a second wiring layer 10 in the main surface facing to the first semiconductor chip, a bump 4 for electrically coupling first electrode pad 2 and second electrode pad 6 together, an insulation layer 8 disposed between the main surfaces of first semiconductor chip 1 and second semiconductor chip 5 facing to each other, and an electro-conductive layer 7 disposed between the main surfaces of first semiconductor chip and second semiconductor chip facing to each other.