Patent ID: 8315038

Claim:
A thin-film capacitor comprising a dielectric thin film and electrodes opposing each other through the dielectric thin film interposed therebetween; wherein the dielectric thin film contains: a perovskite-type composite oxide having a composition expressed by the following chemical formula (1), Mn, and at least one kind of element M selected from the group consisting of V, Nb, and Ta; wherein the dielectric thin film has an Mn content of 0.05 to 0.45 mol with respect to 100 mol of the composite oxide; and wherein the dielectric thin film has a total element M content of 0.05 to 0.5 mol with respect to 100 mol of the composite oxide: A y BO 3 (1) where A is at least one kind of element selected from the group consisting of Ba, Sr, Ca, and Pb, B is at least one kind of element selected from the group consisting of Ti, Zr, Hf, and Sn, and 0.97≦y≦0.995, wherein at least a part of the dielectric thin film has a columnar structure, and the columnar structure has columnar crystals extending normal to an electrode surface.