Advanced Materials Research Vol. 658

Abstract: A magnetic polymer electrolyte using agarose as polymer matrix, NMP as solvent and NiO nanoparticles as modifier was investigated and employed in the dye-sensitized solar cell (DSSC) in this paper. The influence of NiO nanoparticles content on magnetic polymer electrolyte was characterized by SEM and ionic conductivity test. The photovoltaic properties of the corresponding DSSCs were studied by photovoltaic performance tests. The results showed that the surface morphology of the polymer electrolyte with 1.0wt% NiO nanoparticles was smooth and this magnetic polymer electrolyte showed the maximum conductivity (2.43×10-3S•cm-1). The optimal photoelectric efficiency of 1.63% was achieved at the NiO nanoparticles content of 1.0wt%.

Abstract: In present study, the aging behavior of the hot extruded semi-solid Mg-10Al-0.3Mn alloy was investigated. In order to obtain the extruded bar, we carried out the hot extrusion at 380°C with an extrusion ratio of 25 and ram speed of 2.4mms-1. Vickers hardness test, electrical conductivity measurements, scanning and transmission electron microscopy and tensile testing were performed to identify the aging behaviors and mechanical properties during the aging treatment. Observations of the aging behavior and results of the tensile tests after the T6 heat treatment at each aging temperature show that the optimum aging conditions was indicated by a hardness increment of 72% and a tensile strength of 340MPa in the extruded bar.

Abstract: In this paper, the electrical and physical analysis is carried out to investigate the effect of Al2O3 capping layer on ZnO film using atomic layer deposition. ZnO TFTs shows the metallic conduction behavior as Al2O3 capping layer thickness increases. From SIMS analysis, it is found out that the diffusion of Al into ZnO film is enhanced according to Al2O3 capping layer thickness. Moreover, the defects related to oxygen such as oxygen vacancy increase from XPS analysis and ZnO films reveal less compressive stress by substitution of Zn with Al form XRD analysis. That is, the metallic conduction behavior of ZnO TFTs with Al2O3 capping layer can be explained due to increase in the carrier concentration in ZnO channel layer from oxygen vacancy and substitution of Zn with Al.

Abstract: RF characteristics of metal-insulator-metal (MIM) capacitors with SiO2/HfO2/SiO2 (SHS) were investigated using an equivalent circuit model that is associated with the main impedance ZMIM.cap and the substrate-related conductance Ysub. However, the parasitic capacitance in Ysub was lower than that of another element component in ZMIM.cap, which makes difficult for accurate RF modeling because the parasitic component was dominant at high frequency regions. As low parasitic component is eliminated from the modeling, the extracted capacitance for SHS MIM capacitor was stable up to 20 GHz. The Q-factor and resonant frequency (fr) point of SHS structure are 23.9 at 1 GHz and 9.76 GHz, respectively.

Abstract: . In this paper, dielectric relaxation and reliability of high capacitance density metal-insulator-metal (MIM) capacitor using Al2O3-HfO2-Al2O3 sandwiched structure were analyzed. It is shown that multilayer MIM capacitor provides high capacitance density and low dissipation factor at room temperature. The dielectric relaxation voltage shows little dependence on the capacitor area. The capacitance density (C0) increases and quadratic voltage coefficient (α) decreases as a function of stress time under constant voltage stress (CVS) because of the charge trapping effect in the high-k dielectric.

Abstract: For the system on panel applications, we fabricated and analyzed the polycrystalline silicon (poly-Si) silicon-oxide-nitride-oxide-silicon (SONOS) memory device on different buffer layer such as oxide or nitride. The threshold voltage (VT) and transconductance (gm) are extracted from each device and the X-Ray Diffraction (XRD) measurement is carried out to interpret these characteristics. The results show the device on oxide layer has higher mobility and lower VT than on nitride layer. From the XRD spectra, it can be explained by the fact that the grain size of poly-Si on oxide layer has larger than on nitride layer. The both devices show program/erase characteristics as the potential of SOP memory devices.

Abstract: For short hangers, the influence of flexural rigidities and boundary conditions on tension measuring cannot be neglected. But there has no effective method to precisely calculate hanger tension considering the two parameters. This paper proposes the Added Mass Method (AMM) to simultaneously identify the tension, flexural rigidity and boundary condition of short hangers. In this method, the effect of mass distribution of structure on natural frequencies has been studied to add extra calculation conditions for establishing the eigenvalue equation set. The method of Genetic Algorithm (GA) with adaptive crossover and mutation rate is used to solve the equation set quickly. The results provides that the AMM is a high-accurate field testing technology in tension measurement for short hanger of arch bridge.

Abstract: This paper presents a novel patternable electrophoretic polymer (EPP) coating technology for sidewall package in microelectronic devices. The main features of this EPP film are directly patterned via through-mask electrophoretic deposition. The proposed EPP coating has some overwhelming merits against other coating polymers, such as self-patterning via through-mask deposition, good adhesive performance, selective coating, low cost and compatible with IC process. The focus is on the process, patterning, properties characterization and application of this novel electrophoretic polymer. The main applications can be aimed for electrical/thermal isolations or sidewall packaging in semiconductor device package.

Abstract: In this work, polyurethane coating on the fabrics is studied in the Basecoater 200. The structure and morphology of coated fabrics were investigated using SEM and soaking test in the cured coated samples. Coating thicknesses, surface friction coefficient and surface roughness variation of the samples were measured using the surface tester of the KESF. Results showed that uniform and cross linking degree of the surface layer of coated samples have close relevant with coat processing. The performance quality of end products can be achieved by optimization of process variables, including coating speed, coating solution, and cure temperature and fabric matrixes during fabric coating processing.

Abstract: This study examined the effect of the coating speed, coating solution, cure temperature, knife gap and fabric matrixes on surface properties, water vapor permeability and hydrostatic head test. The optimum conditions for surface high water vapour permeability that enables the user to “dial in” the right balance of properties based on the findings of the experimental. This sample showed high excellent resistance to +7m in hydrostatic head tests for a single-layer coated fabric and. Surface morphology showed that the coating was continuous without cracks or pin holes and appeared to be well adhered to the substrate even after a harsh wash.