CN – Page 28 – TechConnect Briefs

Binding Energy of an Exciton Bound to a Charged Impurity in Quantum Dots

Xie W., Guangzhou University, CN

Binding energies for an exciton (X) trapped in the two-dimensional quantum dot by a charged impurity located on the z axis at a distance from the dot plane are calculated using the method of few-body [...]

The Microstructure and Computed Magnetic Properties of Nanoscaled Permanent Magnets

Zhang J.X., Zhang T.J., Zhang J.X., Zhang T.J., Cui K., Key State Laboratory of Die Technology, HUST, CN

Magnetic properties of a model nanocomposite magnet were calculated by means of computer simulation, and the effects of the amount of the soft magnetic phase on them were studied. The numerical results show that the [...]

Comparative Studies of Novel Capacitive Transducers with Non-Planar Diaphragms

Chen J., Liu L., Li Z., Liu L., Tsinghua University, CN

Novel single-chip fabricated condenser structures with corrugated diaphragms for residual stress releasing have been proposed and simulated. An electrostatic-structural coupling FEM analysis has been performed to fully reveal the nonlinear relationship of output electrical signal [...]

Electromechanical and Microwave S-parameter Properties of a Wide Tuning Range MEMS Tunable Capacitor

Chen J., Zou J., Liu C., Kang S-M, University of Illinois, CN

We present the electromechanical and microwave properties of a novel micromachined parallel-plate tunable capacitor with a wide tuning range. Different from conventional two-parallel-plate tunable capacitors, this novel tunable capacitor consists of one suspended top plate [...]

Design and Simulation of A Novel Highly Symmetrical Piezoelectric Triaxial Accelerometer

Li G., Li T., Li Z., Li G., Li T., Li Z., Wang C., Hao Y., Li G., Li T., Li Z., Wu G., Peking University, CN

A monolithic piezoelectric triaxial accelerometer, using a highly symmetric quad-beam structure with a single seismic mass, has been developed. The structure of the accelerometer is analyzed in detail theoretically and numerically. Static and modal simulations [...]

A Novel Approach to Simulate the Potential at the Center Axis of Poisson’s Equation in Cylindrical Coordinates for Plasma Immersion Ion Implantation Processes

Kwok D.T.K., Zeng Z.M., Chu P.K., City University of Hong Kong, CN

A novel and practical method is developed to resolve the three dimensional Poisson’s and Laplace’s equation at the center axis in cylindrical coordinates. The method employs the rectangular xyz co-ordinates to solve the potential f [...]

Automatic Differentiation Technique in Device Model Parameter Extraction

Cheng B., Shao Z., Wang L., Tang T., Yu Z., Xi'an Jiaotong University, CN

Automatic Differentiation (AD), based on the nonstandard analysis theory, is a new technique in computer numerical analysis. An AD based algorithm for device model parameter extraction is presented. Using this algorithm, the constrained parameter extraction [...]

High-Field and High-Temperature Transport in n-Type 3C-SiC

Zhang Y., Zhang Y., Xidian University, CN

The physical model used in Monte Carlo simulation is developed considering the energy gap structures and the main scattering mechanisms in details. The static electron transport in the material 3C-SiC is analyzed by single particle [...]

Electrical Analogue of Capacitive Force-Balanced Accelerometer Used in HSPICE Simulator

Li Z., Wu G., Wang Y.Y., Peking University, CN

Analyzing mechanism of accelerometer, electrical analogue of capacitive force-balanced accelerometer used in HSPICE simulator has been developed. Comparing to the former equivalent circuit, we use acceleration instead of displacement as input variable. Thus we can [...]