Recording/reproduction head and recording/reproduction device
OwnerYasuo Cho, Atsushi Onoeinventors
Life of this patent
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Abstract
A phase-change recording/reproduction head includes: a probe consisting of a recording/reproduction electrode, an insulation layer arranged on the tip portion of the recording/reproduction electrode, and a resistor arranged on the insulation layer; and a return electrode arranged around the probe. During recording, voltage corresponding to the recording data is applied to the resistor so that the phase change recording medium is changed from a crystalline state to an amorphous state. During reproduction, FM-modulated frequency of an oscillator oscillating according to the capacity corresponding to the dielectric constant of the crystalline state and the amorphous state is demodulated, thereby reproducing data with a high SN ratio.
Claims22
A recording/reproducing head for recording data into a phase change recording medium or for reproducing data recorded in the phase change medium,
- said recording/reproducing head comprising:
- a probe having:
- (i) a reproducing electrode, which is made of a conductive member, and which has a substantially spherical protrusive tip having a predetermined radius for detecting the data;
- (ii) an insulation layer covering the substantially spherical protrusive tip;
- and (iii) a resistive member which is located on a portion of the insulation layer which covers the substantially spherical protrusive tip and which generates heat in recording the data;
- and
- a return electrode, which is located around said probe, for returning a high-frequency component of an electric field applied to said probe.
A recording/reproducing head for recording data into a phase change recording medium or for reproducing data recorded in the phase change medium,
- said recording/reproducing head comprising:
- a probe having:
- a supporting member, which is made of an insulating member, and which has a substantially spherical protrusive tip having a predetermined radius for detecting the data;
- and a resistive member which covers the substantially spherical protrusive tip and which generates heat in recording the data;
- and
- a return electrode, which is located around said probe, for returning a high-frequency component of an electric field applied to said probe.
Dependencies are inferred from the claim text.