Kazuyoshi Fushinobu
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View article: Scalable Thermal Engineering via Femtosecond Laser‐Direct‐Written Phononic Nanostructures
Scalable Thermal Engineering via Femtosecond Laser‐Direct‐Written Phononic Nanostructures Open
Modern electronics demands innovative thermal management strategy beyond conventional approaches. Here, A transformative platform bridging laboratory‐scale phononic nanostructures and industrial‐scale thermal engineering is demonstrated vi…
View article: Rapid Electro‐Thermal Micro‐Actuation of Flat Optics Enabled by Laser‐Induced Graphene on Colorless Polyimide Substrates
Rapid Electro‐Thermal Micro‐Actuation of Flat Optics Enabled by Laser‐Induced Graphene on Colorless Polyimide Substrates Open
A high‐performance electro‐thermal micro‐actuator for active optical devices is demonstrated, fabricated via the direct laser writing (DLW) of laser‐induced graphene (LIG) onto a colorless polyimide (CPI) substrate. This approach leverages…
View article: Analysis of Thermophysical Properties of Thick Film Material based on Temperature Rise measured by using Electrical-pump / Optical-probe Type Thermoreflectance Technique
Analysis of Thermophysical Properties of Thick Film Material based on Temperature Rise measured by using Electrical-pump / Optical-probe Type Thermoreflectance Technique Open
View article: Novel Thermophysical Property Analysis Technique by Using Combined Electrical-Pump Thermoreflectance Method and Structure Function
Novel Thermophysical Property Analysis Technique by Using Combined Electrical-Pump Thermoreflectance Method and Structure Function Open
View article: Observation of in-plane moisture distribution of a drying process using terahertz waves
Observation of in-plane moisture distribution of a drying process using terahertz waves Open
View article: Prediction of thermal contact resistance of uniform contact based on surface topography measurement
Prediction of thermal contact resistance of uniform contact based on surface topography measurement Open
View article: Transfer characteristics for laser-induced forward transfer of stainless steel particle
Transfer characteristics for laser-induced forward transfer of stainless steel particle Open
Additive manufacturing (AM) holds great development potential in several applications. In particular, the fabrication of metal parts has been rapidly developing as an industry recently. In such applications, a powder feeder with low materi…
View article: Analysis of Surface Temperature and Evaporation Rate of Inkjet Droplets After Impact
Analysis of Surface Temperature and Evaporation Rate of Inkjet Droplets After Impact Open
Measurements of evaporation rate and temperature drop are simultaneously carried out while a sessile droplet evaporates on a PET film. Evaporation of inkjet droplets is a complex phenomenon involving airflow, temperature and vapour diffusi…
View article: Heat and Mass Transfer Mechanisms of Particle Dispersed Systems during Late-Stage of Drying Ink
Heat and Mass Transfer Mechanisms of Particle Dispersed Systems during Late-Stage of Drying Ink Open
In this report, we focused on pigments and polymers, which are considered to have an influence on drying speed among ink components, and quantitatively evaluated their effects. As an experiment, we measured the drying process of ink liquid…
View article: Prediction Method of the Paper Media Temperature in Electrophotographic Process Printing by Using LSTM Network
Prediction Method of the Paper Media Temperature in Electrophotographic Process Printing by Using LSTM Network Open
The objective of this study is to predict paper media temperature at paper outlet in electrophotographic printing in order to improve the toner fixing quality. Continuous printing experiments were conducted under various conditions of prin…
View article: Viscosity change of model ink liquid film during drying process
Viscosity change of model ink liquid film during drying process Open
It is important to analyze the ink evaporation mechanism to improve the printing speed of commercial inkjet printers. Whether or not the solid components are internally dispersed can be determined by measuring the change in viscosity of th…
View article: Heat Dissipation Measurement of Electronic Component on PCB by Means of External Heater and Heat Flux Sensor
Heat Dissipation Measurement of Electronic Component on PCB by Means of External Heater and Heat Flux Sensor Open
A new heat dissipation measurement method based on an external heater and a heat flux sensor was proposed. The information of boundary conditions and thermal properties of materials, such as the thermophysical properties of printed circuit…
View article: Selective laser ablation of metal thin films using ultrashort pulses
Selective laser ablation of metal thin films using ultrashort pulses Open
Selective thin-film removal is needed in many microfabrication processes such as 3-D patterning of optoelectronic devices and localized repairing of integrated circuits. Various wet or dry etching methods are available, but laser machining…
View article: Short pulse lasetr processing characteristics of transparent materials
Short pulse lasetr processing characteristics of transparent materials Open
Short pulsess laser processing is a very important technique for transparent materials such as glass substrates of information and communication devices. However, the research has not sufficiently advanced on the ablation processing, becau…
View article: Thermal Conductivity of Open-Cell Copper Foam Based Thermal Interface Component
Thermal Conductivity of Open-Cell Copper Foam Based Thermal Interface Component Open
Thermal management has become a big problem with the increasing performance and miniaturization of electronic devices. In particular, in-vehicle electronic devices are not only subjected to high temperatures but also have to sustain impact…
View article: Numerical Investigation on Surface Coverage of Weakly-Adsorbed Molecular SO2 Contaminant in a PEM Fuel Cell Cathode
Numerical Investigation on Surface Coverage of Weakly-Adsorbed Molecular SO2 Contaminant in a PEM Fuel Cell Cathode Open
This paper describes attempt to numerically predict surface coverage of SO2 contaminant in a PEMFC cathode, as a step towards assessing its impact towards cell performance. Three-dimensional macro-homogeneous conservation equations of two-…
View article: Numerical study of heat transfer and chemical kinetics of solar thermochemical reactor for hydrogen production
Numerical study of heat transfer and chemical kinetics of solar thermochemical reactor for hydrogen production Open
A solar thermochemical reactor is a device utilizing concentrated solar energy to conduct hydrogen gas production by two-step water-splitting by dissociation of a reactive material, such as zinc oxide (ZnO). Reactor design, heat transfer, …
View article: Elucidation of the mechanism of transparent materials by using short pulse lasers
Elucidation of the mechanism of transparent materials by using short pulse lasers Open
Transparent materials have been gaining more and more attention in a wide range of applications, such as ICT equipment and energy conversion devices, with continuously increasing demand in the future. Such applications require micromachini…
View article: Analysis of Mass Transport Properties in PEFC with Multilayered Cathode Catalyst Layer
Analysis of Mass Transport Properties in PEFC with Multilayered Cathode Catalyst Layer Open
PEFC(Polymer Electrochemical Fuel Cell) has been introduced in household and automotive applications. One of the problem of PEFC to be solved is its cell performance improvement. In this research, we focused on the improvement of oxygen an…
View article: Heat dissipation measurement technique for semiconductor devices on printed circuit boards by using heat flux sensors
Heat dissipation measurement technique for semiconductor devices on printed circuit boards by using heat flux sensors Open
As electronic devices become simultaneously smaller and faster, thermal management for such products requires innovative solutions, which should take into consideration ever more stricter size constraints. However, form factor is not the o…
View article: Bessel beam laser-scribing of thin film silicon solar cells by ns pulsed laser
Bessel beam laser-scribing of thin film silicon solar cells by ns pulsed laser Open
The thin film solar cells have attracted wide attentions for its low implementation cost and representative flexibilities such as selectivity of materials and fabrication conditions. On the thin film solar cells, width of the grooves of pa…
View article: Investigation of Transport-Reaction Phenomena in Multi-Layered PEFC Cathode Catalyst Layer
Investigation of Transport-Reaction Phenomena in Multi-Layered PEFC Cathode Catalyst Layer Open
Improvement in power generation performance of Polymer Electrolyte Fuel Cell (PEFC) is required for its market supremacy. The microstructure of cathode catalyst layer (CCL) is known to dictates the power generation performance of PEFC. Als…
View article: Laser drilling of SiC substrate with Bessel beam
Laser drilling of SiC substrate with Bessel beam Open
SiC is expected as a next generation power semiconductor material due to its excellent properties. For SiC power device production, an efficient drilling method for 3D packaging technology aiming at further space saving is needed. In order…
View article: Analysis of the Transport Properties of Crossover Gas Species in PEFC Membrane
Analysis of the Transport Properties of Crossover Gas Species in PEFC Membrane Open
One of the problems in Polymer Electrolyte Fuel Cell (PEFC) is degradation of membrane by hydrogen peroxide produced by reaction of crossover hydrogen and oxygen in membrane phase. Knowing properties of the degradation leads to durable des…
View article: A233 Nanosecond pulse laser scribing of fluorine doped tin oxide thin film using Bessel beam
A233 Nanosecond pulse laser scribing of fluorine doped tin oxide thin film using Bessel beam Open
For the fabrication of groove on FTO thin film, substrate (glass) side laser scribing is usually used to obtain several tens μm groove width. In this study, in order to achieve smaller groove width, Bessel beam, which has extremely small b…
View article: D214 Analysis of Oxygen Transport Properties in Recast Ionomer Thin Film
D214 Analysis of Oxygen Transport Properties in Recast Ionomer Thin Film Open
Several studies have reported that oxygen transport in ionomer in a PEFC catalyst layer (CL) is the rate determining process. To understand oxygen transport phenomena in ionomer in detail, diffusion-limited currents were measured by using …