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    • 6. 发明专利
    • RECORDING ELEMENT
    • JP2000298990A
    • 2000-10-24
    • JP10370899
    • 1999-04-12
    • HITACHI LTD
    • HOSAKA SUMIOKOYANAGI HAJIMEISSHIKI FUMIO
    • G11C13/04
    • PROBLEM TO BE SOLVED: To realize phase variation record with super-high density without using a mechanical system by using difference of resistance values of a crystalline phase and an amorphous phase in phase variation materials for storage principle of information. SOLUTION: A memory unit (cell) of information is a recording element having such plural structure that a storage member 2 using phase variation materials is held between a first electrode 1 and a second electrode 3. When this storage member 2 is a crystalline phase, a current I made to flow between the first and the second electrodes is easy to flow. On the other hand, when the storage member 2 is an amorphous phase, a current I made to flow between the first and the second electrodes is hard to flow. Then, when read-out voltage is assumed as Vr, current I2, and I2 can be measured. As resistance values of a crystalline phase and an amorphous phase of the storage member 2 are different by about two figures, values of current are different by almost two figures. By using this characteristic, it can be read out that information is '1' or '0'.
    • 7. 发明专利
    • PATTERN FORMING METHOD AND DEVICE
    • JPH11248718A
    • 1999-09-17
    • JP5178498
    • 1998-03-04
    • HITACHI LTD
    • KOYANAGI HAJIMEHOSAKA SUMIO
    • H01L21/302G01N37/00G01Q80/00G01Q90/00G11B9/14H01L21/3065
    • PROBLEM TO BE SOLVED: To form a pattern in a micro-scale newly on a resist film of film thickness that does not bring about any defects by providing a contact force exceeding the elastic limit of the surface of the resist for between a probe electrode and the surface of the resist, plastically deforming the surface. and simultaneously exposing the resist by a current passing between the probe electrode and a substrate. SOLUTION: A contact force between a probe electrode 1 and the surface of a resist 14 deflects a blade spring 2. Laser light from a laser diode 3 is condensed onto the back surface of the blade spring 2, and the displacement of the reflected light is detected by a position sensor 5 to detect the contact force between the probe electrode 1 and the resist 14. A force servo circuit 7 outputs a signal to a Z-direction micro-motion device 17 so that a signal from the sensor 5 may become a constant value. A current detector 11 detects a current between the probe electrode 1 and a substrate 13 via the resist 14 outputs a signal to a current servo circuit 12, and regulates impressed voltage to an electrode 1 so that the signal may become a constant value. A groove in a scale of tens of nanometers or less is formed on the surface of the resist 14 through the use of a rotation driving device 15 and a radial driving device 16.
    • 8. 发明专利
    • CIRCUIT ELEMENT
    • JPH09199042A
    • 1997-07-31
    • JP730396
    • 1996-01-19
    • HITACHI LTD
    • HOSAKA SUMIOKIKUKAWA ATSUSHIKOYANAGI HAJIME
    • H01J19/24H01J21/06H01J21/10H01L29/66
    • PROBLEM TO BE SOLVED: To provide a solid element capable of being operated at the room temperature by arranging multiple fine electrodes in tunnel coupling between a source electrode and a drain electrode, and controlling the current flowing between the source electrode and the drain electrode with a control electrode coupled with the fine electrodes by electrostatic capacity. SOLUTION: Multiple fine conductors 2 arranged sporadically for tunnel coupling to feed currents and multiple control fine conductors 3 sandwiched by the fine conductors 2 are formed between a source electrode 1 and a drain electrode 4 provided on an insulator. The control fine conductors 3 are coupled with a control electrode 5 by electrostatic capacity, and they control the current flowing between the source electrode 1 and the drain electrode 4 based on the signal from the control electrode 5. A circuit element capable of realizing an amplifier and a switching element in a solid with the insulator and the conductors is obtained.