Super elastic alloy (SEA) has the characteristic of two-way deformation by heating and cooling under prestressed condition. The characteristic makes it possible to realize an actuator of flexible, compact, and quiet. Therefore, SEA can be applied to such robots for medical, assist, welfare, automatic door, and so on. However, there are many difficulties in its control as actuator because SEA shows strong non-linear behavior on its deformation process. In this study, the measurement system of state quantities on the non-linear characteristics of SEA is constructed to control the deformation of it as practical actuator. Here, the actuator made by SEA is heated by electric current. And then, electrical systems are also developed to measure the state quantities of temperature, strain and electric resistivity of SEA during the Joule heating for its mechatronical control. In addition, the measurement of the electric resistivity on the process of heating and cooling is performed by applying pulse voltage for perform stable and accurate measurement even at a low voltage is applied.
Micron-sized diamond anvils with a 3 μm culet were successfully processed using a focused ion beam (FIB) system and the generation of high pressures was confirmed using the double stage diamond anvil cell technique. The difficulty of aligning two second-stage micro-anvils was solved via the paired micro-anvil method. Micro-manufacturing using a FIB system enables us to control anvil shape, process any materials, including nano-polycrystalline diamond and single crystal diamond, and assemble the sample exactly in a very small space between the second-stage anvils. This method is highly reproducible. High pressures over 300 GPa were achieved, and the pressure distribution around the micro-anvil culet was evaluated by using a well-focused synchrotron micro-X-ray beam.
A new synthetic route was developed to obtain highly regioregular poly[(2-methoxy-5-alkyloxy)-1,4-phenylenevinylene]s (PPVs) by the Horner reaction using asymmetrically functionalized monomers. The polymers showed good solubility in chlorobenzene at over 100 °C. The high regioregularity of the polymers was confirmed by 1H NMR quantitative analysis using chlorobenzene-d5 as solvent, which was developed for the first time in this study. Assignment of the 1H NMR peaks was conducted by synthesizing four novel model compounds for PPV. UV−vis, fluorescence spectra, and XRD data revealed that these regioregular PPVs have higher crystallinity compared to regiorandom PPVs in the solid state.
Wireless electric power transmission systems do not require a cord and AC adapter to supply electric power. This paper presents at energy transmission system over a long distance for a wireless notebook computer. The transmitting coil is implanted in the floor, and the receiving coil is implanted in the notebook computer; consequently, the battery of the notebook computer can be charged anywhere around the room. The energy transmission efficiency and the biological effects of the electromagnetic field are analyzed using an electromagnetic simulator. The specific absorption rate and the internal electric field are below the basic restrictions of the International Commission on Non-Ionizing Radiation Protection. At the same time, energy of 50 W, which is the necessary maximum energy for a notebook computer, can be safely transmitted.
This paper describes the first demonstration of 8-10μm diameter micro-vias at 20μm pitch in ultra-thin dry-film polymer dielectrics to achieve high-density and low-cost redistribution layers (RDL) on panel-based glass and organic interposers. A polymer dielectric dry-film, ZEONIF ZS100, at 10μm thickness was double side laminated on thin and low CTE glass and organic substrates. Micro-via arrays at 20μm pitch were formed by 248nm KrF excimer laser ablation using mask projection scanning, and metallized by a semi-additive process (SAP) using electroless and electrolytic copper plating, with no chemical-mechanical polishing to form fully filled via structures. Fully-filled micro-vias at 20um were achieved using processes scalable to large panels for low-cost and high-density 2.5D and 3D interposers.
The metal/InGaAs Schottky devices with Ni, TiN and stacked Ni/Si were fabricated. J-V and C-V characteristics were measured and Schottky barrier height was calculated.
In this study, a system that can print in high accuracy when printing high viscous material with electrostatic inkjet method has been developed in order to create a high quality food product. However, when creating a 3D structure with the developed system, rheology of the printing material needs to be considered. Therefore, we have also investigated the influence of rheology by printing food sample within different printing surface temperature and printing time lapse. The appropriate surface temperature and printing time course have been determined by the study in order to print 3-dimensional structure for food material.
