CAPACITOR

摘要

PURPOSE: A capacitor is provided to remarkably reduce the dielectric loss value by forming a multi-layered dielectric substance including a second dielectric layer formed into a first dielectric layer and the BiZnNb system oxide. CONSTITUTION: A dielectric substance(120) is formed in a first electrode(110). A second electrode(130) is formed in the dielectric substance. The dielectric substance comprises a first dielectric layer(122) and a second dielectric layer(124). The second dielectric layer is formed in the first dielectric layer. The second dielectric layer has the dielectric loss smaller than the first dielectric layer. The dielectric constant of the second dielectric layer is smaller than the dielectric constant of the first dielectric layer and is greater than 4. The second dielectric layer comprises at least one selected among a group consisting of the BiZnNb system oxide, the BiTi system oxide, the BiNb system oxide, the BiCuNb system oxide, and the BiMgNb system oxide.