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A high-programming-throughput three-dimensional (3D) vertical chain-cell-type phase-change memory (VCCPCM) array for a next-generation storage device was fabricated. To increase the number of write cells at one time by reducing resistance of bit and source lines, the VCCPCM array includes plate electrodes and double-gate vertical-chain-selection MOSs with 5-nm-thick poly-Si channels. In addition,...
A three-dimensional (3-D) vertical chain-cell-type phase-change memory (VCCPCM) for next-generation large-capacity storage was developed. The VCCPCM features formation of memory holes in multi-layered stacked gates by using a single mask and a memory array without a selection transistor. As a result of this configuration, the number of process steps for fabricating the VCCPCM is reduced. The excellent...
An Ultra wideband (UWB) spatio-temporal channel sounder, employing an orthogonal frequency division multiplexing (OFDM) signal and a receiving virtual array antenna was prototyped and evaluated in a narrowband interference environment. Channel information of the OFDM signal was estimated from the measured data. Time of arrival (TOA) was calculated by correlating the received waveforms with a template...
Software visualization with sequence diagrams is one of the promising techniques aimed at helping developers comprehend the behavior of object-oriented systems effectively. However, it is still difficult to understand this behavior, because the size of automatically generated sequence diagrams tends to be beyond the developer's capacity. In this paper, we propose a sequence diagram slicing method,...
This paper describes a transparent bifacial biopsy chip toward the functional adaptor for endoscopic operation. The device consists of an observation side and a biopsy side. The observation side has a photonic pattern array that plays the role of planar light guide, while the biopsy side has a micro-knife array. The device can be simultaneously used for in situ observations and biopsies. We demonstrate...
This paper presents an ultra-wideband (UWB) double-directional channel sounding technique using transformation between time domain (TD) and frequency domain (FD) signals. We proposed the time-of-arrival (TOA), angle-of- arrival (AOA) estimation algorithm and angle-of-departure (AOD) with some modifications of our previous work. There were four main advantages of the proposed estimation technique as...
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