Patent ID: 7355290

Claim:
An interposer comprising: a base formed of a plurality of resin layers; 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 first thin-film capacitors including a first capacitor electrode, a second capacitor electrode opposed to the first capacitor electrode, and a capacitor dielectric film formed between the first capacitor electrode and the second capacitor electrode and having a relative dielectric constant of 200 or above; a first through-electrode formed through the base and electrically connected to the first capacitor electrode; and a second through-electrode formed through the base and electrically connected to the second capacitor electrode, wherein both the first resin layer and the second resin layer are penetrated with the first through-electrode, and both the first resin layer and the second resin layer are penetrated with the second through-electrode.