Abstract: The dielectric material is, for example, a ferroelectric single crystal having a uniform thickness, and its one surface is used for a recording and reproducing surface on which a probe for recording and reproducing works. LiTaO3 is used as the dielectric material. The conductive thin film, which is, for example, about 1000 to 2000 Å thick, is placed on a surrounding portion of a recording and reproducing surface, a back surface, and a side surface of the dielectric material. This conductive thin film, to which aluminum is added by a method of deposition, is connected to a common electrode of a recording and reproducing apparatus. The substrate is intended to preserve the dielectric material, which is thin, and it uses silicon or the like in a predetermined thickness, for example. A conductive paste is a material for sticking to the substrate the dielectric material having the conductive thin film thereon, and indium and silver paste are used for it.

Abstract: A dielectric information apparatus is provided with a plurality of electrodes (14) for recording information in a small area of a dielectric substance (12) and an earthed electrode (13). The electrodes (14, 13) are placed such that the dielectric substance (12) is sandwiched between the electrodes (14) and the electrode (13). The dielectric information apparatus reads out the information recorded in the small area of a dielectric thin film (12) by applying alternating current signals to the first electrodes (14). The polarization direction of the small area and the direction of an applied electric field decide the dielectric constant of the small area, and the oscillation frequency of an oscillator 20 is determined by a capacitance Cs corresponding to the dielectric constant. An oscillation signal of the oscillator 20 is demodulated at a FM demodulator 21, and the information is detected from the demodulated signal at a signal detector 22.