Kazuki Watanabe

ORCID: 0000-0002-3912-273X
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About
Contact & Profiles
Research Areas
  • Semiconductor materials and devices
  • Advancements in Semiconductor Devices and Circuit Design
  • Low-power high-performance VLSI design
  • Radio Frequency Integrated Circuit Design
  • Integrated Circuits and Semiconductor Failure Analysis
  • Solidification and crystal growth phenomena
  • Copper Interconnects and Reliability
  • Silicon and Solar Cell Technologies
  • Ga2O3 and related materials
  • Genetic Neurodegenerative Diseases
  • Advanced biosensing and bioanalysis techniques
  • Semiconductor materials and interfaces
  • VLSI and Analog Circuit Testing
  • Parallel Computing and Optimization Techniques
  • Advanced Data Storage Technologies
  • Superconductivity in MgB2 and Alloys
  • Physics of Superconductivity and Magnetism
  • Liquid Crystal Research Advancements
  • Semiconductor Quantum Structures and Devices
  • 3D IC and TSV technologies
  • ZnO doping and properties
  • Interconnection Networks and Systems
  • Neurobiology and Insect Physiology Research
  • Microwave Engineering and Waveguides
  • Advanced Memory and Neural Computing

Hitachi (Japan)
2004-2025

Hamamatsu University School of Medicine
2020-2024

Utsunomiya University
2024

Neurology, Inc
2024

Tokyo Institute of Technology
2018-2023

Nagoya Institute of Technology
1999-2021

Nihon University
2019-2020

Tokyo Metropolitan University
2011-2018

Tokyo Denki University
2016-2017

Kyushu University
2012-2014

Hexylthiophene-conjugated boron-dibenzopyrromethenes with benzo[1,3,2]oxazaborinine rings, 1, that absorb near-infrared light relatively high molecular extinction coefficients have been synthesized. The incorporation of 3-hexylthiophene-conjugated dye 1a at a blend ratio 5 wt % into polymeric solar cell based on P3HT/indene-C(70) bisadduct (IC(70)BA) bulk heterojunction structure improved power conversion efficiency from 3.7 to 4.3%. present work suggests well-defined absorbing BODIPY...

10.1021/ol201770g article EN Organic Letters 2011-08-09

A powder-like 0.09 mm/sup 2/ 2.45 GHz RF identification chip for wireless recognition applications is described. This fabricated in a 0.18 /spl mu/m CMOS process, and its thickness 60 mu/m. two-surface connection technique adopted to facilitate antenna attachment. The distance between the reader 300 mm power of mW.

10.1109/isscc.2003.1234354 article EN 2003-12-22

Twist bend nematic (NTB)-forming 9OCCHP5 and 11OCCHP5 dimers were synthesised by one-step condensation of 4-(4-pentylcyclohexyl) benzoic acid alkyl diol with yields as high 80%. Although each dimer formed the NTB phase only during cooling process in a narrow temperature width large 4°C, their equiweight mixture an both heating processes, displaying elliptical polygonal domains rope-like optical texture. The range became wider 29–38°C reduced orientational order parameter significantly from...

10.1080/02678292.2018.1435830 article EN Liquid Crystals 2018-02-05

In onion thrips Thrips tabaci, reduced sensitivity of the sodium channel caused by several mutations have been correlated with pyrethroid resistance. For this study, using mitochondrial cytochrome c oxidase subunit I gene sequences, we examined phylogenetic relation among a total 52 thelytokous and arrhenotokous strains different genotypes mutations. Then, used flow cytometry to estimate their ploidy. Results showed that are divisible into three groups: diploid thelytoky, triploid...

10.1038/s41598-024-54443-9 article EN cc-by Scientific Reports 2024-02-15

In a variety of animal species, females hold leading position in evaluating potential mating partners. The decision virgin to accept or reject courting male is one the most critical steps for success. fruitfly Drosophila melanogaster, however, molecular and neuronal mechanisms underlying female receptivity are still poorly understood, particularly females. painless (pain) gene encodes transient receptor (TRP) ion channel. We previously demonstrated that mutations pain significantly enhance...

10.1371/journal.pone.0088175 article EN cc-by PLoS ONE 2014-02-04

In order to scale high-voltage transistors for high-density negative-gate channel-erasing NOR flash memories, two circuit techniques were developed. A proposed level shifter with low operating voltage is composed of three parts, a latch holding the negative erasing voltage, coupling capacitors connected latched nodes in latch, and drivers inverting resulting reduction maximum internal by 0.5 V. generator adds path-gate logic conventional realize both noise ripple As result, these along high...

10.1109/jssc.2002.803045 article EN IEEE Journal of Solid-State Circuits 2002-10-01

System area networks (SANs), which usually accept irregular topologies, have been used to connect nodes in PC/WS clusters or high-performance storage systems. Since wormhole virtual cut-through transfer is for low latency communication, deadlock-free routings are essential SANs. We propose a novel deterministic routing called descending layers (DL) In order reduce both nonminimal paths and traffic congestion, the network divided into of subnetworks with same topology using channels, large...

10.1109/icpp.2003.1240620 article EN 2003-01-01

Fabricated in 0.18 /spl mu/m SiGe BiCMOS, 16:1 MUX and 1:16 DMUX MCMs equipped with an SFI-5 interface operate at 43 Gb/s. The on-chip CDR external VCO recovers a full-rate clock 2.5/spl deg/ RMS jitter from 2/sup 31/-1 PRBS. bus also operates error-free 2.7 Gb/s, tolerates plusmn/6.6 Ul static skew.

10.1109/isscc.2003.1234280 article EN 2003-12-22

Low process cost air-gap structure for multilevel interconnect system is proposed by all-in-one post-removing process. Problems regarding the were studied and solutions moisture uptake metal wiring oxidation developed. The compatible with conventional BEOL Furthermore, this can build least additional steps, it tolerates misalignment.

10.1109/iitc.2008.4546964 article EN International Interconnect Technology Conference 2008-06-01

We have fabricated a full-wave rectifier using fully depleted amorphous In-Ga-Zn-O thin-film transistors (TFTs). The is composed of four TFTs, and it rectified 13.56-MHz wireless input from 200-mW commercial RFID reader/writer. also analyzed an output voltage operation frequency the rectifier.

10.1109/ted.2012.2213091 article EN IEEE Transactions on Electron Devices 2012-09-04

We investigated the genetic basis and brain metabolism blood flow of a Japanese family with spinocerebellar degeneration (SCD), multiple affected members for 3 generations.After excluding DNA repeat expansion (RE) common SCD genes by fragment analysis, we performed whole-exome sequencing (WES) whole-genome (WGS). Homozygosity mapping was using these data. REs were WGS data ExpansionHunter Denovo Expansion Hunter.WES unable to identify likely pathogenic variants, homozygosity failed narrow...

10.1212/nxg.0000000000000682 article EN cc-by-nc-nd Neurology Genetics 2022-05-23

Abstract Monitoring the pain intensity in critically ill patients is crucial because intense can cause adverse events, including poor survival rates; however, continuous evaluation difficult. Vital signs have traditionally been considered ineffective assessment; nevertheless, use of machine learning may automate assessment using vital signs. This retrospective observational study was performed at a university hospital Sendai, Japan. Objective assessments were eligible Critical-Care Pain...

10.1038/s41598-021-84714-8 article EN cc-by Scientific Reports 2021-03-04

This paper presents a 65 nm CMOS technology for mobile multimedia applications. The reduction of interconnect capacitance is essential high-speed data transmission and small power consumption core chips. We have chosen hybrid ULK structure which consists NCS (nano-clustering silica; k=2.25) at the wire level SiOC (k=2.9) via level. Although porous material, NCS/SiOC has sufficient mechanical strength to endure CMP pressure bonding. Successfully fabricated 200 nm-pitch hybrid-ULK/Cu...

10.1109/iedm.2003.1269280 article EN 2004-03-22

In the fruitfly Drosophila melanogaster, females take initiative to mate successfully because they decide whether or not. However, little is known about molecular and neuronal mechanisms regulating sexual receptivity in virgin females. Genetic tools available are useful for identifying molecules neural circuits involved regulation of receptivity. We previously demonstrated that insulin-producing cells (IPCs) female brain critical Ablation inactivation IPCs enhance receptivity, suggesting...

10.1266/ggs.15-00025 article EN cc-by Genes & Genetic Systems 2015-01-01

A digital anemometer using a self-heated thermistor as probe has been developed for low flow rate measurements. The principle of measurement is based on hot-wire anemometry. To enhance the sensitivity to while reducing convection due self-heating minimum, kept lowest possible temperature exhibiting negative resistance. heat removed from analyzed and compared with measured results, derive characteristic function which relates voltage across temperature. This transformed domain time by...

10.1109/imtc.1994.351837 article EN 2002-12-17

Several high-density 1Mb BiCMOS SRAMs have been reportd recently[1,2]. High speed 16-256Kb SRAMs, which extensively use bipolar ECL peripheral circuits, also proposed [3,4].

10.1109/vlsic.1991.760054 article EN Symposium on VLSI Circuits 1991-01-01

A 0.2-/spl mu/m bipolar-CMOS process technology on a bonded SOI wafer was developed for ultra-high-speed applications. This used to fabricate new cache memory chip consisting of 9-Mb 0.6-ns SRAMs and 200-K 25-ps ECL gate array. To achieve high performance, the features 6-/spl mu/m/sup 2/-cell-size BJT with 50-nm base width, 6T-CMOS cell copper interconnects that reduce wiring delay by 30%. combination low-energy ion-implantation two-step annealing applied form low-leakage, shallow junction....

10.1109/iedm.1998.746326 article EN 2002-11-28
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