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US 5,396,483 AGranted
Recording medium having a track and electrode layer provided and recording and reproducing device and system using same
AssigneeCanon Kabushiki Kaisha
InventorsHiroshi Matsuda, Hisaaki Kawade, Yuko Morikawa
Life of this patent
Estimating the term…
Abstract
A recording medium is prepared by irradiating an electron beam on a substrate following a certain pattern, then vapor depositing a metal onto the substrate to form a track comprising ultra-fine particles of the metal, further providing a metal layer on the substrate, and providing a recording layer on the metal layer. Recording is effected on a track having a preferable width of 40 .ANG. to 400 .ANG. formed on the recording surface of the medium by applying a pulse voltage or current between the medium and a probe arranged approximate thereto.
Claims28
A recording medium, comprising:
- an electrode substrate comprising a substrate provided thereon with a track having a width in the range of 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and an electrode layer provided on the track having a thickness such that a groove formed in said electrode layer by said track does not embed said track;
- and
- a recording layer for recording information, said recording layer being provided on said electrode layer and having a thickness such that a groove formed in said recording layer by said track does not embed said track.
A recording device, comprising:
- a recording medium including an electrode substrate comprising a substrate provided thereon with a track having a width in the range of 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and an electrode layer provided on the track having a thickness such that a groove formed in said electrode layer by said track does not embed said track, and a recording layer for recording information, said recording layer being provided on said electrode layer and having a thickness such that a groove formed in said recording layer by said track does not embed said track;
- an electroconductive probe arranged as proximately opposed to said recording medium;
- and
- means for applying a pulse voltage between said medium and said probe, so that a recording bit may be formed in the recording layer at a track area by flowing electrical current due to application of the pulse voltage.
1 more element
A reproducing device, comprising:
- a recording medium comprising an electrode substrate including a substrate provided thereon with a track having a width in the range of 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and an electrode layer provided on the track having a thickness such that a groove formed in said electrode layer by said track does not embed said track, and a recording layer provided on said electrode layer and having a thickness such that a groove formed in said recording layer by said track does not embed said track, said medium having a recording bit in the recording layer at a track area;
- an electroconductive probe arranged as proximately opposed to said recording medium;
- and
- means for applying a voltage between said medium and said probe, so that the recording bit may be read out by detecting electrical current due to application of the voltage.
1 more element
A recording and reproducing device, comprising:
- a recording medium comprising an electrode substrate including a substrate provided thereon with a track having a width in the range of 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and an electrode layer provided on the track having a thickness such that a groove formed in said electrode layer by said track does not embed said track, and a recording layer for recording information, said recording layer being provided on said electrode layer and having a thickness such that a groove formed in said recording layer by said track does not embed said track;
- an electroconductive probe arranged as proximately opposed to said recording medium;
- means for applying a pulse voltage between said medium and said probe, so that a recording bit may be formed in the recording layer at a track area by flowing electrical current due to application of the pulse voltage, and
- means for applying a voltage between said medium and said probe, so that the recording bit may be read out by detecting electrical current due to application of the voltage.
1 more element
A recording medium, comprising:
- a substrate provided thereon with a track having a width in the range of 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and
- a recording layer for recording information, said recording layer being provided on said substrate and having a thickness such that a groove formed in said recording layer by said track does not embed said track.
A recording device, comprising:
- a recording medium including
- a substrate provided thereon with a track having a width in the range of from 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and
- a recording layer provided on the track for recording information, the recording layer having a thickness such that a groove formed in said recording layer by said track does not embed said track;
- an electroconductive probe arranged as proximately opposed to said recording medium, and
- means for applying a pulse voltage between said medium and said probe, so that a recording bit may be formed in the recording layer at a track area by flowing electrical current due to application of the pulse voltage.
2 more elements
A reproducing device, comprising:
- a recording medium having
- a substrate provided thereon with a track having a width in the range of 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and
- a recording layer provided on the track for recording information in the form of a recording bit, the recording layer having a thickness such that a groove formed in said recording layer by said track does not embed said track;
- an electroconductive probe arranged as proximately opposed to said recording medium, and
- means for applying a voltage between said recording medium and said probe, so that the recording bit may be read out by detecting electrical current due to application of the voltage.
2 more elements
A recording and reproducing device, comprising:
- a recording medium including
- a substrate provided thereon with a track having a width in the range of 40 .ANG. to 400 .ANG. and a height or depth in the range of 25 .ANG. to 1000 .ANG. at a pitch in the range of 60 .ANG. to 500 .ANG., and
- a recording layer provided on the track for recording information, the recording layer having a thickness such that a groove formed in said recording layer by said track does not embed said track;
- an electroconductive probe arranged as proximately opposed to said recording medium;
- means for applying a pulse voltage between said medium and said probe, so that a recording bit may be formed in the recording layer at a track area by flowing electrical current due to application of the pulse voltage, and
- means for applying a voltage between said medium and said probe, so that the recording bit may be read out by detecting electrical current due to application of the voltage.
3 more elements
Dependencies are inferred from the claim text.