SUBSTRATE WITH BUILT-IN FUNCTIONAL ELEMENT

摘要

Provided is a substrate with a built-in functional element, which has the functional element on a metal plate, wherein crosstalk-noise among signal wirings can be reduced, and characteristic impedance can be matched furthermore. The substrate with a built-in functional element comprises: a metal plate that has a recess section, and that is to become the ground; a functional element that is arranged at the recess section, and has electrode terminals; a first insulation layer that covers the functional element, and that is arranged to be in contact with the metal plate; a first wiring layer comprising first signal wirings that are arranged in opposition to the metal plate with the first insulation layer interposed therebetween; a second insulation layer that covers the first wiring layer; and a ground layer comprised of a ground plane that is arranged in opposition to the first wiring layer with the second insulation layer interposed therebetween.