numerical modeling – TechConnect Briefs

Numerical Modeling for Comparison of Emitter-Base Designs of InGaP/GaAs Heterojunction Bipolar Transistors

, Universitat Politecnica de Catalunya, ES

In this work it is investigated the consequences of the design of the emitter pedestal in the electric DC and AC performance of GaInP/GaAs HBTs using numerical modeling TCAD tool. Two different HBTs are studied [...]

Numerical Modeling of Nanoscale Silicon Photodetectors that Use Electromagnetic Resonance Modes to Enhance Performance

Crouse D., Keshavareddy P., The City College of New York, US

Several high responsivity, high bandwidth, low bit error ratio (BER) nanoscale Si photodetectors are modeled including metal-semiconductor-metal photodetectors (MSM-PD), MSM-PDs fabricated on silicon-on-insulator substrates, and avalanche photodiodes. The authors have analyzed surface plasmons and other [...]

Numerical Modeling of a Piezoelectric Micropump

Schlipf R., Haghighi K., Lange R., Purdue University, US

An effective description and an accurate understanding of any pumping mechanism is critical, especially of the micro scale. With the existence of a comprehensive and adaptable model, accurate preproduction predictions of performance are realized. Optimal [...]

Voltage Current Curve of a PEM Fuel Cell

Kulikovsky A.A., Research Center - Juelich, DE

First we consider 1D problem of the cathode catalyst layer (CCL) performance. The general solution is presented and simple analytical formulas for CCL polarization voltage are obtained. Based on these formulas we build a simple [...]

Numerical Modeling of Ferrofluid Flow Instabilities in a Capillary Tube at the Vicinity of a Magnet

Berthier J., Ricoul F., LETI, FR

The use of ferrofluids is now foreseen to be important for microfluidic systems and biotechnological microsystems as microvalves, micropumps or for the control and synchronization of the flow. The advantage lies in the possibility of [...]

Numerical Modeling of Magnetic Field Flow Fractionation in Microchannels: A Two-fold Approach Using Particle Trajectories and Concentration

Berthier J., Pham P., Massé P., LETI, FR

Submicronic paramagnetic particles are currently used for biological applications like medical diagnostic [1]. Recently modeling of displacement of such particles has seen new developments like the calculation of the trajectory of a particle [2], or [...]

Adaptive Hierarchical Finite Element Modeling of Dopant Diffusion

Bose A., Rafferty C.S., Bell Laboratories, US

We present a finite element formulation based on a hóp refinement strategy for the coupled dopant-defect diffusion problem in semiconductor process modeling. The algorithm involves increasing the degree p of the element basis as well [...]