Capacitor element, manufacturing method therefor, semiconductor device substrate, and semiconductor device

A combination of a capacitor element and a semiconductor element wherein;

• said capacitor element is configured to mount a semiconductor element thereon;
• said capacitor element comprises a base and a capacitor part provided on said base;
• and
• said base is made of a resin whose coefficient of linear expansion is adjusted in accordance with a coefficient of linear expansion of the semiconductor element that is mounted on the capacitor element.

A semiconductor device substrate on which a semiconductor element having on a substrate may be mounted, said semiconductor device substrate comprising:

• a substrate body having a bottom surface that serves as a mounting surface in which external connection terminals are arranged;
• and
• a capacitor element including:
• a base made of a resin whose coefficient of linear expansion is adjusted in accordance with the semiconductor element to be mounted to a value between a coefficient of linear expansion of the substrate body and a coefficient of linear expansion of the substrate of the semiconductor element;
• a capacitor part including two opposing electrodes and a dielectric layer interposed therebetween;
• a plurality of terminals in a top surface of the capacitor element;
• and
• a plurality of terminals in a bottom surface of the capacitor element, the capacitor element being embedded in the substrate body, a top surface of the capacitor element being exposed at a top surface of the substrate body and serving as a surface on which the semiconductor element may be mounted.