Patent ID: 8254144

Claim:
A circuit board laminated module, comprising: a first circuit board having a multi-layer structure in which ground layers are provided in a plurality of layers; a second circuit board mounted on the first circuit board; and a semiconductor chip mounted on the second circuit board, wherein in the first circuit board, a noise guiding through via which guides an electromagnetic noise generated in the semiconductor chip to a lower layer side is provided on a side different from a circuit portion or a circuit element desired to be protected against influence of the electromagnetic noise in a surrounding direction of an occurrence place of the electromagnetic noise, a plurality of layers of the second circuit board include at least one ground layer electrically connected to the ground layer of the first circuit board provided with the noise guiding through via, the circuit element includes a laminate inductor formed using the wiring layer of the second circuit board, and in a region below the laminate inductor, openings larger than an area of the laminate inductor are formed in all ground layers of ground layers of the second circuit board and the ground layers of the first circuit board except for a rear surface ground layer of a lowermost layer of the first circuit board.