Patent ID: 7863524

Claim:
An interposer comprising: a glass substrate with a first through-electrode buried in; a plurality of resin layers supported by the glass substrate; a thin film capacitor buried between a first resin layer of said plurality of resin layers and a second resin layer of said plurality of resin layers, the thin film capacitor including a first capacitor electrode, a second capacitor electrode opposed to the first capacitor electrode and formed only directly over the first capacitor electrode, and a dielectric thin film of a relative dielectric constant of 200 or above formed only directly over the first capacitor electrode and between the first capacitor electrode and the second capacitor electrode; a second through-electrode penetrating said plurality of resin layers, electrically connected to the first through-electrode, and electrically connected to the first capacitor electrode or the second capacitor electrode; an opening formed in the second resin layer, the opening exposing the second capacitor electrode; and a conductor plug buried in the opening, wherein the second through-electrode is electrically connected to the second capacitor electrode via the conductor plug and an interconnection formed on the second resin layer.