Patent ID: 7248482

Claim:
A module with a built-in circuit component, comprising: an electric insulating layer; a pair of wiring layers provided on both principal planes of the electric insulating layer; a plurality of via conductors electrically connecting the pair of wiring layers and passing through the electric insulating layer in a thickness direction thereof; a circuit component buried in the electric insulating layer; and a pair of wiring boards disposed so as to sandwich the electric insulating layer, wherein one of the pair of wiring layers provided on both principal planes of the electric insulating layer functions as a wiring layer for one of the wiring boards, and the other wiring layer functions as a wiring layer for the other wiring board, the plurality of via conductors are disposed at least on a part of a circumference of the electric insulating layer in accordance with a predetermined rule, a coefficient of linear thermal expansion of the wiring boards in a direction orthogonal to a thickness direction thereof is smaller than that of the electric insulating layer in a direction orthogonal to a thickness direction thereof, and a Young's modulus of the wiring boards is larger than that of the electric insulating layer.