Dielectric recording / reproducing head and dielectric recording / reproducing apparatus

A dielectric reproducing apparatus for reproducing data recorded in a dielectric recording medium, comprising:

• a dielectric reproducing head comprising (i) a probe for applying a high-frequency signal to the dielectric recording medium to detect a nonlinear dielectric constant of a part of the dielectric recording medium located under the probe, (ii) a plurality of bias electrodes placed around the probe, for forming an electric field parallel to a surface of the dielectric recording medium, and (iii) a return electrode for returning the high-frequency signal;
• an alternating current signal generating device for generating an alternating current signal to be applied to the plurality of bias electrodes of the dielectric reproducing head to form the electric field;
• an oscillating device for generating the high-frequency signal to be applied to the probe;
• a demodulating device for demodulating the high-frequency signal including a signal component corresponding to the nonlinear dielectric constant detected by the probe;
• and
• a data reproducing device for reproducing the data on the basis of the demodulated high-frequency signal and the alternating current signal.

A dielectric recording apparatus for recording data in a dielectric recording medium, comprising:

• a dielectric recording head comprising (i) a probe and (ii) a plurality of bias electrodes placed around the probe, for forming an electric field corresponding to the data parallel to a surface of the dielectric recording medium;
• a recording signal generating device for generating a recording signal corresponding to the data;
• and
• a signal applying device for applying the recording signal between the probe and any one of the plurality of bias electrodes to form the electric field corresponding to the data.

A dielectric recording/reproducing apparatus for recording data in a dielectric recording medium and for reproducing data recorded in the dielectric recording medium, comprising:

• a dielectric recording/reproducing head comprising (i) a probe, (ii) a plurality of bias electrodes placed around probe, (iii) a return electrode placed near the probe,
• an oscillating device for generating a high-frequency signal to be applied between the probe and the return electrode, in order to detect a nonlinear dielectric constant of a part of the dielectric recording medium located under the probe through the probe;
• an alternating current signal generating device for generating an alternating current signal to be applied to the plurality of bias electrodes, in order to form an electric field in the dielectric recording medium;
• a demodulating device for demodulating the high-frequency signal including a signal component corresponding to the nonlinear dielectric constant of a part of the dielectric recording medium located under the probe;
• a data reproducing device for reproducing the data on the basis of the demodulated high-frequency signal and the alternating current signal;
• a recording signal generating device for generating a recording signal corresponding to the data to be recorded;
• and
• a signal applying device for applying the recording signal between the probe and any one of the plurality of bias electrodes.