Patent ID: 7936568
Filing Date: 2011-05-03
Classification: H01G,H01L,H05K,Y10T

Abstract:
1. A capacitor built-in substrate, comprising: a base resin layer having an opening portion which passes through to a thickness direction; a capacitor first electrode filled in a whole of the opening portion and having a first projection portion projected to a lower side from the opening portion and a second projection portion projected to an upper side from the opening portion, wherein the first projection portion serves as a connection portion and an end and a side of the first projection portion are exposed, and the second projection portion has a hemispherical shape; a capacitor dielectric layer covering a surface of the hemispherical shape of the second projection portion of the capacitor first electrode and a capacitor second electrode covering the dielectric layer; wherein the capacitor is constructed by the capacitor first electrode, the dielectric layer, and the capacitor second electrode, and is arranged from the opening portion of the base resin layer onto the opening portion, and a plurality of capacitors are arranged in a lateral direction in a state that the capacitors are passed through the base resin layer, wherein an intermediate resin layer is formed between at least two of said plurality of capacitors, a through electrode provided to pass through the base resin layer and having projection portions projected from both surface sides of the base resin layer respectively; and a built-up wiring formed on the base resin layer and connected to the capacitor second electrodes and one end side of the through electrode.