Dielectric recording/reproducing head and dielectric recording/reproducing apparatus
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United States of America Patent
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Dec 19, 2006
Grant Date -
Jun 3, 2004
app pub date -
Nov 28, 2003
filing date -
Nov 28, 2002
priority date (Note) -
Expired
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Abstract
A dielectric recording/reproducing head is provided with: a probe; a return electrode for returning a high-frequency component of an electric field applied from the probe; and bias electrodes, which are placed under the return electrode. By applying a voltage stronger than a coercive electric field between the probe and each of the bias electrodes, polarization domains are formed which have polarization directions parallel to a surface of a dielectric recording medium. The polarization directions are determined by selecting the bias electrode to which the voltage is applied, and four types of data are recorded on a predetermined site of the dielectric recording medium, which allows multivalued recording. Moreover, the polarization directions of the polarization domains are detected by an electric field which is formed by applying a voltage between the bias electrodes and which is parallel to the surface of the dielectric recording medium, causing data to be read out.
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