Dielectric recording/reproducing head and dielectric...

Details Dielectric recording/reproducing head and dielectric... Dielectric recording/reproducing head and dielectric...

2006-12-19

2006-12-19

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Electrical modification or sensing of storage medium

Reexamination Certificate

active

07151739

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.

REFERENCES:
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patent: 2004/0090903 (2004-05-01), Cho et al.
Odagawa et al, “Measuring ferroelectric polarization component parallel to the surface by scanning nonlinear dielectric microscopy”, Applied Physics Letters, vol. 80, No. 12, Mar. 25, 2002.

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