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Cylindrical resonators are commonly used in Coriolis vibratory gyroscopes, which measure angular velocity through the precession of solid wave. Quality factor and its homogeneity are critical indicators of the resonator characteristics. In this paper, we report that the Q factor varies regularly around the resonator's axis of symmetry. We measured the resonator Q factor by the amplitude frequency...
We propose a new technique for femtosecond pulse characterization — transient-grating self-referenced spectral interferometry. Using this technique, we built an extremely simple, alignment-free device and successfully sub-two-cycle 10-fs pulses at 1.75 μm.
Isotropic conductive adhesives (ICAs) are a type of interconnect material used more and more widely in computer, robot, mobile phone, LED and so on. Compared with traditional solders, isotropic conductive adhesives have better working plasticity, creep resistance and heat resistance. In particular, isotropic conductive adhesives are more responsive in high density packaging than solder, which determines...
This paper investigates the effect of nano-scale SiO2 on the tracking failure properties of nanocomposites. Test samples were made by dispersing nano-scale SiO2 powder in epoxy with the weight ratios of 0, 1, 3, 5, 7, 9 wt%. AC voltage was applied on a pair of needle-plate electrodes at the surface with the insulation distance of 10 mm. The time to tracking failure and discharge current were recorded...
Tunable multicolor femtosecond pulses were simultaneously obtained by a cascaded FWM process in fused silica glass. Frequency up-shift and down-shift pulses with energies about 1 muJ, durations of 45 fs sidebands were obtained.
This paper provides a comprehensive review of the recent progress of research work performed to develop new thermal interface materials. The review starts by classifying existing thermal interface materials and analyzing their advantages and disadvantages. The state of the art research is then reviewed with an emphasis on those materials based on various carbon allotropes, such as graphite, carbon...
This paper presents for the first time (110) PMOS characteristics without Rext degradation, allowing investigation of fundamental mobility and demonstration of drive current Ion in excess of 1mA/mum at Ioff =100 nA/μm.
Heat dissipation of semiconductor packages has become one of the limiting factors in miniaturization. A new Nano Thermal Interface Material (Nano-TIM) with potential high thermal conductivity and excellent mechanical properties manufactured by electrospinning process has been published earlier. In the present work, SiC nano-particles were added into the electrospinning solution to improve the thermal...
The need for faster, smaller, and more reliable and efficient products has resulted in increase of heat generated in microelectronic components. The removal of the heat generated is an important issue in electronic packaging. The present research work aims at developing a new class of nano-thermal interface material (nanoTIM) that has low thermal resistance, high thermal conductivity and mechanical...
Long-range periodic nanoplane gratings written inside fused silica using a focused femtosecond laser beam can be erased and replaced with new gratings whose orientation is determined by the polarization of the femtosecond laser overwrite beam.
This work aims to develop an anisotropic conductive adhesive (ACA) paste with improved thermal conductivity. ACA consists of a polymer based resin and conductive filler particles. We introduce an electrically insulating but thermally conductive phase into the adhesive. Nano and micro scale particles of alumina oxide, silicon carbide and carbon nanotubes are used with and without surface treatment...
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