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Voltage-control spintronics memory (VoCSM) is a spintronics-based memory that uses the voltage-control-magnetic-anisotropy (VCMA) effect as a selection method and the spin-Hall effect as a write method, and is a candidate for future nonvolatile main memory because of its advantages such as high density, low energy consumption, and robustness against read disturbance. In this paper, we demonstrate...
Low power consumption of high-speed memories such as cache memories will be realized by use of magnetic random access memory (MRAM). We have proposed the voltage-control spintronics memory (VoCSM) as a writing method. The VoCSM has a large operation margin because the current path in writing and the voltage path in reading are separated. The fabrication process we have employed is the two-step self-alignment...
We propose a new approach for improving the operating margin of Ta2O5/plasma oxidized TiO2 stacked unipolar ReRAM. It was found that the reset voltage (switching from low resistance state to high resistance state) can be minimized by using local minimum against the resistance of the low resistance state. In addition, weakening the plasma oxidation condition reduced the power consumption and the variation...
Solid-electrolyte crossbar switch (namely NanoBridge) with low programming current of 420μA and highly reliable ON state against pulsed-alternating current (AC) stress is demonstrated under practical operating conditions of a programmable logic device (PLD). The ON-state duration under a pulsed-AC stress is achieved >10 years at 150°C. The high reliability under AC originates from the fact that...
A fully logic-compatible, nonvolatile crossbar switch using a novel dual-layer TiOx/TaSiOy solid-electrolyte, ??NanoBridge??, has been developed for the first time, which is scalable to 50 nm and beyond and keeps the extremely low ON-resistance of <100 ??. A key breakthrough is the dual-layer solid-electrolyte, in which TiOx works as an oxygen absorber as well as a superior ionic conductor, thus...
The Effect of the bottom electrode of ReRAM with a Ta2O5/TiO2 stack on noise and retention was investigated. The current fluctuation due to complex random telegraph noise (RTN) resulted in errors in the read-out with multi-level operation. We clarified that the Ti diffusion into the TiO2 layer from the bottom electrode increased the trap density and thus degraded current stability. The increased density...
Mostly, one motor is arrangement to each joint of the commercial assist manipulator for the quality of daily life. The multi-motor system drives a single load with two or more motors (multi-motor system). This system has high power and high redundancy. There are further demands for the actuator the robot. This paper demonstrates the hard braking with multi-motor system.
The cooling technology that is most widely used for computers is air-cooling, because this is a mature technology with the least operation and maintenance cost. In order to push the limit of the air-cooling capability, enhancement of heat transfer from the processor to cooling medium is needed. Recently, the processor has multi-cores such as dual-cores, quad-cores. So, the heat dissipation from the...
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