Akira Fujiwara

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We propose merged single-electron and MOS devices that serve as basic components of multiple-valued logic, such as a universal literal gate and a quantizer. We verified their operation by using single-electron transistors and MOSFETs fabricated on the same wafer by pattern-dependent oxidation process. We also discuss their application to an(More)
The single-electron device (SED) is drawing a lot of attention for future large-scale integration because of its low-power nature and small size. We have developed a novel method called pattern-dependent oxidation (PADOX) for fabricating small Si single-electron transistors (SETs) and used it to make many kinds of SEDs. One of the most primitive and(More)
Single-electron devices (SEDs) are attracting a lot of attention as devices for future large-scale integration because of their inherent low power and small size. It is well known that SEDs have to have small islands together with tunnel barriers at both ends, which makes it difficult to make them. We have developed a novel method of fabricating small Si(More)
We report here a new type of "single-electron" memory that works as a multiple-valued SRAM. A schematic of the proposed memory is shown in Fig. 1. The source of a MOSFET with fixed gate bias V gg is connected to the drain of a single-electron transistor (SET), and the SET drain voltage is kept nearly constant around V gg-V th , where V th is the threshold(More)
We reported previously that ATP2B1 was one of the genes for hypertension receptivity in a large-scale Japanese population, which has been replicated recently in Europeans and Koreans. ATP2B1 encodes the plasma membrane calcium ATPase isoform 1, which plays a critical role in intracellular calcium homeostasis. In addition, it is suggested that ATP2B1 plays a(More)
The recessive black plumage mutation in the Japanese quail (Coturnix japonica) is controlled by an autosomal recessive gene (rb) and displays a blackish-brown phenotype in the recessive homozygous state (rb/rb). A similar black coat color phenotype in nonagouti mice is caused by an autosomal recessive mutation at the agouti locus. An allelism test showed(More)
The ultimate limit in the operation of an electronic device is the manipulation of a single charge. Such a limit has been achieved in single-electron tunnelling devices. However, these devices are based on multiple tunnel barriers and conductive islands, which are complex structures to fabricate. Here we demonstrate another type of device that can also(More)
The MUSES-C mission is the world's first sample and return attempt to/from the near Earth asteroid. In deep space, it is hard to navigate, guide, and control a spacecraft on a real-time basis remotely from the earth mainly due to the communication delay. So autonomy is required for final approach and landing to an unknown body. It is important to navigate(More)
Manipulation of single electrons is the key to developing ultimate electronics such as single-electron-based information processors and electrical standards in metrology. Especially, high-frequency and high-accuracy single-electron pumps are essential to realize practical current standards. While electrically defined quantum dots are widely used to build(More)