摘要:
In a disk apparatus using a ferroelectric thin film coated on the surface of a disk as a recording medium, an electrode layer is formed on a substrate and the ferroelectric thin film is formed on the electrode layer, thereby forming a disk. A head is installed on an arm over the disk. The head has a reflector, and a microtip electrode, for creating or erasing polarization of the ferroelectric thin film. An optical system is provided over the head. The head moves towards or away from the disk depending on recorded information (polarization direction), and the movement is read by the optical system. Therefore, a low-priced disk apparatus, capable of freely recording and reproducing information semipermanently, is realized.
摘要:
A non-volatile ferroelectric memory using a leakage current of a dielectric and a multi-numeration system ferroelectric memory are provided. Unit cells are formed of a transistor. A dielectric or a ferroelectric is used as a gate insulating material. A ferroelectric capacitor is deposited on the upper portion of the gate insulating material and the upper electrode of a ferroelectric capacitor is used as a gate. "Writing" is performed by selecting a material in which the leakage current of the ferroelectric has a negligible value and the leakage current of the dielectric (used as the gate insulating material) is sharply increased. Charges induced between the drain and the source, are increased by applying the voltages which have various levels and identical pulse widths (in the case of "deleting" voltages, having identical levels and various pulse widths) making the leakage current of a various current densities flow through the gate insulating material. Thus, the multi-numeration system information can be stored.
摘要:
Provided are nonvolatile memory transistors and devices including the nonvolatile memory transistors. A nonvolatile memory transistor may include a channel element, a gate electrode corresponding to the channel element, a gate insulation layer between the channel element and the gate electrode, an ionic species moving layer between the gate insulation layer and the gate electrode, and a source and a drain separated from each other with respect to the channel element. A motion of an ionic species at the ionic species moving layer occurs according to a voltage applied to the gate electrode. A threshold voltage changes according to the motion of the ionic species. The nonvolatile memory transistor has a multi-level characteristic.
摘要:
A resistive memory device includes a vertical transistor and a variable resistance layer. The vertical transistor includes a gate electrode on a surface of a substrate, a gate insulation layer extending along a sidewall of the gate electrode, and a single crystalline silicon layer on the surface of the substrate adjacent to the gate insulation layer. At least a portion of the single crystalline silicon layer defines a channel region that extends in a direction substantially perpendicular to the surface of the substrate. The variable resistance layer is provided on the single crystalline silicon layer. The variable resistance layer is electrically insulated from the gate electrode. Related devices and fabrication methods are also discussed.
摘要:
Semiconductor devices including variable resistance materials and methods of operating the semiconductor devices. The semiconductor devices use variable resistance materials with resistances that vary according to applied voltages as channel layers.
摘要:
A color printing paper includes a substrate having a printing region and a plurality of photonic crystal patterns formed on the printing region. The plurality of photonic crystal layer patterns have different respective optical reflection characteristics. The printing method includes selecting pixels including a plurality of photonic crystal layer patterns that express at least one of a red color, a green color, and a blue color, and changing optical reflection characteristics of at least a portion of the plurality of photonic crystal layer patterns of the selected pixels.
摘要:
Provided are a storage medium, which has a security function, for storing media content and an output apparatus for outputting data stored in the storage medium. The storage medium includes a controller for converting at least one of a position of pins of a connector and a storage position of media content in a memory unit in order to control transmission of the media content in the memory unit to the output apparatus.
摘要:
A storage device may include a storage unit that stores data transmitted via a plurality of first wires; and a security control unit that controls connection between each of a plurality of second wires connected to an external device and each of the plurality of first wires by programming a plurality of switching devices according to an encryption key.
摘要:
A resistive memory device includes a vertical transistor and a variable resistance layer. The vertical transistor includes a gate electrode on a surface of a substrate, a gate insulation layer extending along a sidewall of the gate electrode, and a single crystalline silicon layer on the surface of the substrate adjacent to the gate insulation layer. At least a portion of the single crystalline silicon layer defines a channel region that extends in a direction substantially perpendicular to the surface of the substrate. The variable resistance layer is provided on the single crystalline silicon layer. The variable resistance layer is electrically insulated from the gate electrode. Related devices and fabrication methods are also discussed.
摘要:
Example embodiments may provide data storage devices using movement of a magnetic domain wall and/or a method of operating magnetic domain data storage devices. The data storage device may include a first magnetic layer for writing data having two magnetic domains magnetized in different directions, a second magnetic layer for storing data at a side of the first magnetic layer, a data recording device connected to the first magnetic layer and the second magnetic layer, and a plurality of reading heads configured to read the second magnetic layer. The data storage device may store a larger amount of data without requiring moving mechanical systems.