Scanning tunnel-current-detecting device and method for detecting tunnel current and scanning tunnelling microscope and recording/reproducing device using thereof
First Claim
1. A method for recording an information into a recording medium by means of a probe electrode in proximity to the recording medium, comprising using a first probe electrode and a second probe electrode, which can be driven independently, supported by a supporting member, and recording an information into said recording medium by means of said first probe electrode, while compensating deviation of a distance between said first probe electrode and said recording medium by adjusting a distance between said recording medium and said supporting member so as to keep substantially constant a current flowing between said second probe electrode and said recording medium.
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Abstract
A scanning tunnel-current-detecting device comprising at least two probe electrodes supported by a supporting member, a means for placing a sample in proximity to the probe electrodes, a means for applying voltage between the probe electrodes and the sample, at least one of the probe electrodes being provided with a mechanism for measuring and compensating variation of the distance between the supporting member and the sample, is provided.
78 Citations
44 Claims
- 1. A method for recording an information into a recording medium by means of a probe electrode in proximity to the recording medium, comprising using a first probe electrode and a second probe electrode, which can be driven independently, supported by a supporting member, and recording an information into said recording medium by means of said first probe electrode, while compensating deviation of a distance between said first probe electrode and said recording medium by adjusting a distance between said recording medium and said supporting member so as to keep substantially constant a current flowing between said second probe electrode and said recording medium.
- 7. A method for reproducing a recorded information by means of a probe electrode in proximity to a recording medium comprising using a first probe electrode and a second probe electrode, which can be driven independently, supported by a supporting member, and reproducing said information from said recording medium by means of said first probe electrode, while compensating deviation of a distance between said first probe electrode and said recording medium by adjusting a distance between said recording medium and said supporting member so as to keep substantially constant a current flowing between said second probe electrode and said recording medium.
- 13. A method for erasing a recorded information by means of a probe electrode in proximity to a recording medium comprising using a first probe electrode and a second probe electrode, which can be driven independently, supported by a supporting member, and erasing said recorded information by means of said first probe electrode, while compensating deviation of a distance between said first probe electrode and said recording medium by adjusting a distance between said recording medium and said supporting member so as to keep substantially constant a current flowing between said second probe electrode and said recording medium.
- 19. A method for recording an information into a recording medium by means of a probe electrode in proximity to a recording medium, comprising using at least four probe electrodes, which can be driven independently, supported by a supporting member, and recording an information into said recording medium by means of the fourth probe electrode, while adjusting a distance between a surface of said recording medium and said supporting member so as to keep nearly constant each current flowing between said first to third probe electrodes and said recording medium, respectively.
- 26. A method for reproducing a recorded information by means of a probe electrode in proximity to a recording medium, comprising using at least four probe electrodes, which can be driven independently, supported by a supporting member, and reproducing said information in said recording medium by means of the fourth probe electrode, while adjusting a distance between a surface of said recording medium and said supporting member so as to keep substantially constant each current flowing between said first to third probe electrodes and said recording medium, respectively.
- 33. A method for erasing a recorded information by means of a probe electrode in proximity to a recording medium, comprising using at least four probe electrodes, which can be driven independently, supported by a supporting member, and erasing said information in said recording medium by means of the fourth probe electrode, while adjusting a distance between a surface of said recording medium and said supporting member so as to keep substantially constant each current flowing between said first to third probe electrodes and said recording medium, respectively.
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40. An information detecting device for detecting an information by means of a probe electrode in proximity to a sample surface, comprising at least four probe electrodes, which can be driven independently, supported by a supporting member, and provided with a means for adjusting a distance between said sample surface and said supporting member so as to keep substantially constant each current flowing between said first to third probe electrodes and said sample surface, respectively, and keeping said sample surface and said supporting member horizontal, and a driving means for driving said fourth probe electrode.
- 41. A recording/reproducing device for recording an information into a recording medium and/or for reproducing or erasing a recorded information by means of a probe electrode in proximity to a recording medium, comprising at least four probe electrodes, which can be driven independently, supported by a supporting member, and provided with a means for adjusting a distance between said recording medium and said supporting member so as to keep substantially constant each current flowing between said first to third probe electrodes and said recording medium, respectively, and keeping said recording medium and a supporting member horizontal, and a driving means for driving said fourth probe electrode.
Specification