Patent ID: 7504682

Claim:
A transfer control method for controlling a polarization transfer device including: a ferroelectric thin film formed continuously as one piece; a plurality of polarization switches formed by placing the ferroelectric thin film between a plurality of first gate electrodes that are each connected to a ground, and a plurality of second gate electrodes that are each alternatively connected to a first or a second control signal; and a plurality of polarization accumulators formed by placing the ferroelectric thin film between a plurality of first electrode plates that are each alternatively connected to a third or a fourth control signal, and a plurality of second electrode plates that are each alternatively connected to a fifth or sixth control signal, wherein the plurality of polarization switches and the plurality of polarization accumulators are arranged alternately, the method comprising: applying at least one of the first, second, third, fourth, fifth and sixth control signals in sync with a clock to the plurality of polarization switches and the plurality of polarization accumulators that are alternatively arranged on the ferroelectric thin film; applying a first control voltage controlled by at least one of the first and second control signals to each corresponding second gate electrode of the plurality of polarization switches; and applying a second control voltage controlled by at least one of the third, fourth, fifth and sixth control signals to each corresponding first electrode plate and second electrode plate of the plurality of polarization accumulators such that the first control voltage and the second control voltage are not higher than a coercive voltage of the ferroelectric thin film.