| 摘要 |
PURPOSE:To execute the electrical reproducing processing of information by heating a ferroelectric layer which has recorded the information by utilizing a dielectric polarization, by projecting with a light, and detecting a pyroelectric current. CONSTITUTION:In case of recording, a switch 22a is turned on, and the voltage of a voltage source 23 is applied between the first electrode 13 connected to an earth 21 and the second electrode 16 formed to a strip type. In this state, the selected part of a photoconductive material layer 15 is projected by a laser beam 33. As a result, this projected part conducts, the corresponding part of a ferroelectric layer 14 is polarized and information is recorded. In case of reproduction, a switch 22c is turned on, the electrode 16 is connected to a charge amplifier 25. In this state, when the layer 14 is projected by the beam 33, the layer 14 is heated, and if a residual polarization exists, a pyroelectric current is conducted to the amplifier 25, and reproduction is executed electrically. Also, an erasion is executed by turning on a switch 22b and projecting the light. |
