| 摘要 |
PURPOSE: An electrostatic capacitance element, a manufacturing method thereof, and a resonance circuit are provided to change a capacity value of a static capacitance element by adjusting a relative electrode position of a pair of electrodes including a dielectric layer. CONSTITUTION: A plurality of first electrodes(15) and a plurality of second electrodes(18) are formed in the same plane. A variable capacitance element(1a) includes one layer of ferroelectric layer(12) laminated on an upper part of the first electrode and a lower part of the second electrode. The ferroelectric layer is made of a dielectric substance having a changeable capacity according to a control signal applied from the outside. Shapes of a side, where an electrode of the ferroelectric layer is formed, and an opposite side are rectangular. The ferroelectric layer is made of the ferroelectric material generating ion polarization. The ferroelectric layer electrically generates the ion polarization by displacing atoms of a negative ion and a positive ion.
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