| abstract |
An oxide layer 30 composed of an oxide dielectric substance of the present invention has a pyrochlore-type crystal structure of the crystal phase, and contains oxides composed of bismuth (Bi), niobium (Nb) and titanium (Ti) (It may contain unavoidable impurities). When the number of atoms of bismuth (Bi) is 1, the number of atoms of niobium (Nb) is 0.5 to less than 1.7, and when the number of atoms of bismuth (Bi) When it is 1, the number of atoms of the titanium (Ti) is more than 0 to less than 1.3. |