摘要:
The present invention provides a solid electrolyte switching device, which can maintain an on or off state when the power source is removed, the resistance of which in on the state is low, and which is capable of integration and re-programming, and FPGA and a memory device using the same, and a method of manufacturing the same. A solid electrolyte switching device (10, 10', 20, 20') comprises a substrate (11) in which surface is coated with an insulation layer, a first interconnection layer (13) set on said substrate (11), an ion supplying layer (17) set on said first interconnection layer (13), a solid electrolyte layer (16) set on said ion supplying layer (17), an interlevel insulating layer (12) having a via hole set to cover said first interconnection layer (13), said ion supplying layer (17), and said solid electrolyte layer (16), a counter electrode layer (15) set to contact said solid electrolyte layer (16) through the via hole of said interlevel insulating layer (12), and a second interconnection layer (14) set to cover said counter electrode layer (15). The switching device can be provided in which the on state, or the off state can be arbitrarily set by the threshold voltage applied between the ion supplying layer (17) and the counter electrode layer (15), which is non-volatile, and the resistance of which in the on state is low. The switching device of the present invention is also simple and fine in structure, and hence makes it possible to provide smaller switching devices than are currently available. Further, using the switching device of the present invention as the switching device of an FPGA (30) makes it possible to provide re-programmable and fast operation FPGA (30). Using the switching device of the present invention as a memory cell of a memory device makes it possible to provide a non-volatile memory device with high programming and reading speed.
摘要:
An electronic device comprising a first electrode made of a mixture conductor material having ion conductivity and electron conductivity and a second electrode made of a conductive material, in which a voltage is so applied between the first and second electrodes that the first electrode is negative with respect to the second electrode and thereby mobile ions are moved from the first electrode to the second one to form a bridge between the electrodes. Preferably the mixture conductor material is Ag2S, Ag2Se, Cu2S, or Cu2Se. An interelectrode conductance control method is also disclosed which comprises at least one step of the steps of applying a voltage in such a way that the potential of the second electrode is negative with respect to that of the first electrode so as to move mobile ions from the first electrode to the second electrode and thereby to form a bridge between the electrodes and thinning or cutting the bridge by inverting the polarity of the voltage between the electrodes.
摘要:
An apparatus is provided for evaluating electrical characteristics by bringing a plurality of metal probes in contact with a minute area with low contact resistance. Metal probes (8) are formed on the free end of a cantilever (6) on which are formed a resistor (5), two electrodes (1, 2) for resistance detection, and an electrode (7) for measuring electrical characteristics. The tips of the metal probes (8) can project beyond the free end of the cantilever (6) to reach an area of about 10 nm size. The probe position is controlled by an atomic force microscope technique to achieve low contact resistance.
摘要:
A point contact array applicable to an arithmetic circuit, a logic circuit, and memory device, in which the conductances between electrodes are electrically and reversibly controlled and point contacts are arranged. A circuit comprising point contacts each composed of a first electrode made of a mixture of conductive materials having ion-conductivity and electron-conductivity and a second electrode made of a conductive material is fabricated while controlling the conductances of the point contacts. The conductive material mixture is preferably Ag2S, Ag2Se, Cu2S, or Cu2Se. A semiconductor and an insulating material when they are interposed between electrodes are preferably crystals or amorphous bodies of GeSx, GeSex, GeTex, or WOx (0
摘要:
A solid electrolyte switching device (10, 10’, 20, 20’) comprises a first interconnection layer (13) provided on a substrate (11) covered with an insulating layer, an ion supply layer (17) provided on the first interconnection layer (13), a solid electrolyte layer (16) provided on the ion supply layer (17), an interlayer insulating layer (12) covering the first interconnection layer (13), the ion supply layer (17), and the solid electrolyte layer (16) and having a via hole, a counter electrode layer (15) so disposed as to be in contact with the solid electrolyte layer(16) through the via hole, and a second interconnection layer(14) covering the counter electrode layer(15). The on/off state can be arbitrarily set by a threshold voltage applied between the ion supply layer (17) and the counter electrode layer (15). Thus a nonvolatile, low on-resistance switching device is provided.
摘要:
The optical electric field enhancement element of the invention comprises a nanorod where a conductive layer and an insulating layer are laminated. In particular, the optical electric field enhancement element comprising a tungsten oxide nanorod exhibits a high enhancement effect not by an aggregate of fine crystals but by the crystal structure itself, therefore securing good reproducibility and a stable Raman scattering enhancement effect. A sensor comprising the optical electric field enhancement element enables various high-precision analyses heretofore impossible in the art.
摘要:
The optical electric field enhancement element of the invention comprises a nanorod where a conductive layer and an insulating layer are laminated. In particular, the optical electric field enhancement element comprising a tungsten oxide nanorod exhibits a high enhancement effect not by an aggregate of fine crystals but by the crystal structure itself, therefore securing good reproducibility and a stable Raman scattering enhancement effect. A sensor comprising the optical electric field enhancement element enables various high-precision analyses heretofore impossible in the art.
摘要:
There are provided a point contact array, in which a plurality of point contacts are arranged, each point contact electrically and reversibly controlling conductance between electrodes and being applicable to an arithmetic circuit, a logic circuit, and a memory device, a NOT circuit, and an electronic circuit using the same. A circuit includes a plurality of point contacts each composed of a first electrode made of a compound conductive material having ionic conductivity and electronic conductivity and a second electrode made of a conductive substance. The conductance of each point contact is controlled to realize the circuit. Ag 2 S, Ag 2 Se, Cu 2 S, or Cu 2 Se is preferably used as the compound conductive material. When a semiconductor or insulator material is interposed between the electrodes, a crystal or an amorphous material of GeS x , GeSe x , GeTe x , or WO x (0 A NOT circuit is realized using a device which includes an atomic switch serving as a two-terminal device, the device including a first electrode made of a compound conductive material having ionic conductivity and electronic conductivity and a second electrode made of a conductive substance, and capable of controlling conductance between the electrodes.
摘要:
This invention provides a method for constructing bridge including fine wires or point contacts producing a quanitized inter-electrode conductance, and provides a method for easily controlling the conductance of this bridge. Further, it aims to provide an electronic element using conductance control due to the bridge, fine wire or point contact formed between the electrodes. This invention is an electronic element comprising a first electrode comprising a mixed electroconducting material having ion conductance and electron conductance, and a second electrode comprising an electroconducting substance, wherein the inter-electric conductance can be controlled. This mixed electroconducting material is preferably Ag 2 S, Ag 2 Se, Cu 2 S or Cu 2 Se. This invention is an electronic element formed by a bridge between electrodes, by applying a voltage between the electrodes so that the second electrode is negative with respect to the first electrode and movable ions migrate from the first electrode to the second electrode. Further, this invention is a method of controlling inter-electrode conductance comprising at least one of applying a voltage between the electrodes of the above electronic element so that the second electrode is negative with respect to the first electrode so that a bridge is formed between the electrodes due to the migration of movable ions from the first electrode to the second electrode, and reversing the inter-electrode polarity so that the bridge is thinned or disconnected. In particular, this invention is characterized in that the conductance between the electrodes is quantized.
摘要:
An apparatus is provided for evaluating electrical characteristics by bringing a plurality of metal probes in contact with a minute area with low contact resistance. A metal probe (8) is formed on the free end of a cantilever (6) on which are formed a resistor (5), two electrodes (1, 2) for resistance detection, and an electrode (7) for measuring electrical characteristics. The tip of the metal probe (8) projects beyond the free end of the cantilever (6). This configuration enables a plurality of probes to come into contact with an area of about 10 nm size. The probe position is controlled by an atomic force microscopy to achieve low contact resistance.