US Patent 7423418 Module part

A module component which includes circuit substrate 3 having one or more components 1 on at least one of the surfaces, and junction circuit substrate 5 having hollow 4, or hole, disposed corresponding to the portion of the one or more components 1 mounted on the one surface of circuit substrate 3 for fitting the mounted components 1 in. These substrates are laminated to form a single body so that mounted components 1 is contained within the inside. The above configuration ensures high reliability in the layer-to-layer connection, and enables to mount a plurality of components densely with a high dimensional accuracy. Thus a highly reliable compact module component is offered.