VARIABLE-CAPACITANCE ELEMENT, METHOD FOR ADJUSTING VARIABLE-CAPACITANCE ELEMENT, VARIABLE-CAPACITANCE DEVICE AND ELECTRONIC APPARATUS

摘要

Provided is a variable-capacitance element wherein a desired capacitance value which corresponds to a write voltage can be freely set and a capacitance value which has been set before is maintained even when there is no write voltage. A method for adjusting the variable-capacitance element, a variable-capacitance device and an electronic apparatus are also provided. In a variable-capacitance element (100), a pair of electrodes (101, 102) are formed with a ferroelectric material layer (103) in between. The variable-capacitance element is adjusted by a step of maximizing or minimizing the sum of electric dipole moments of the ferroelectric material layer (103), and a step of writing a capacitance value by applying a desired write voltage (V) to the electrodes (101, 102) of the variable-capacitance element (100), in which the sum of the electric dipole moments of the ferroelectric material layer (103) is maximized or minimized, so that the variable-capacitance element (100) has a desired capacitance value.