Recording medium, recording apparatus and recording method
AssigneeKabushiki Kaisha Toshiba
InventorsKatsuyuki Naito, Hiroyuki Hieda
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Abstract
The present invention provides a recording medium having a plurality of charge accumulating regions each containing a first material capable of accumulating an electric charge and a photoconductive region containing a second material whose conductivity is increased by light absorption, a recording apparatus including such a recording medium, and a method recording information on such a recording medium. In the present invention, information is recorded on the recording medium by irradiating the photoconductive region with light and by injecting an electric charge into the charge accumulating region via that portion of the photoconductive region which is irradiated with light.
Claims18
A recording medium, comprising:
- a substrate;
- a recording layer overlying the substrate and having a plurality of charge accumulating regions each containing a first material capable of accumulating an electric charge;
- at least one electrically insulating region which electrically insulates said plurality of charge accumulating regions from each other;
- and
- a photoconductive layer formed on the recording layer and on the at least one electrically insulating region and having a photoconductive region containing a second material whose conductivity is increased by light absorption.
A recording medium, comprising:
- a substrate;
- a conductive layer overlying the substrate;
- a photoconductive layer overlying the conductive layer and containing a second material whose conductivity is increased by light absorption;
- and
- a recording layer formed on the photoconductive layer and having a plurality of charge accumulating regions each containing a first material capable of accumulating an electric charge;
- and
- an electrically insulating region which electrically insulates said plural charge accumulating regions from each other and is provided with a plurality of through-holes, the through-holes being filled with the charge accumulating regions.
A recording medium, comprising:
- a substrate;
- and
- a recording layer overlying the substrate and comprising an electrically insulating region, a plurality of charge accumulating regions dispersed in the electrically insulating region and each containing a first material capable of accumulating an electric charge, and a plurality of photoconductive regions dispersed in the electrically insulating region and each containing a second material whose conductivity is increased by light absorption.
A recording apparatus, comprising:
- a recording medium comprising a substrate and a recording layer overlying the substrate and having a plurality of charge accumulating regions each containing a first material capable of accumulating an electric charge, said recording layer further comprising (i) at least one electrically insulating region which electrically insulates said plurality of charge accumulating regions from each other and (ii) a photoconductive region containing a second material whose conductivity is increased by light absorption, and said recording medium further comprising a photoconductive layer in contact with the recording layer and having the photoconductive region;
- and
- a recording head arranged to face the main surface of said recording medium and comprising a light emitting section emitting light toward the recording layer when writing information and an electrode being adjacent to said light emitting section and utilized in injecting an electric charge into at least one of said plural charge accumulating regions.
A recording method of recording information by injecting an electric charge into a charge accumulating region containing a first material capable of accumulating the charge, comprising:
- providing the charge accumulating region with a plurality of charge accumulating regions and at least one electrically insulating region which electrically insulates said plurality of charge accumulating regions from each other;
- irradiating a photoconductive region arranged in contact with said charge accumulating region and containing a second material whose conductivity is increased by light absorption with light;
- and
- injecting the electric charge into said charge accumulating region via a portion of the photoconductive region irradiated with light.
Dependencies are inferred from the claim text.