Modell Galerie

Die Modell Galerie umfasst COMSOL Multiphysics Modelldateien aus einer Vielzahl von Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Sie können fertige Modelle herunterladen sowie Schritt-für-Schritt-Anleitungen, mit denen Sie die Modelle nachbauen können, und verwenden Sie die Modelle als Ausgangspunkt für Ihre eigenen Anwendungen. Nutzen Sie die Quick Search, um die für Ihren Fachbereich relevanten Modelle zu finden. Um die Dateien herunterzuladen, loggen Sie sich ein oder erzeugen Sie einen COMSOL Access Account, der mit einer gültigen COMSOL Lizenz assoziiert ist.

DC Characteristics of a MOS Transistor (MOSFET)

This model calculates the DC characteristics of a simple MOSFET. The drain current versus gate voltage characteristics are first computed in order to determine the threshold voltage for the device. Then the drain current vs drain voltage characteristics are computed for several gate voltages. The linear and saturation regions for the device can be identified from these plots.

P-N Junction Benchmark Model

This simple benchmark model computes the potential and carrier concentrations for a one-dimensional p-n junction using both the finite element and finite volume methods. The results are compared with an equivalent device from the book, "Semiconductor Devices: A Simulation Approach," by Kramer and Hitchon.

P-N Junction Diode with External Circuit

This model extracts spice parameters for a silicon p-n junction diode. The spice parameters are used to create a lumped-element equivalent circuit model of a half-wave rectifier that is compared to a full device level simulation. In this example, a device model is made by connecting a 2D meshed p-n junction diode to a circuit containing a sinusoidal source, a resistor and a ground to form a basic ...

Heterojunction Benchmark

This one-dimensional model simulates three different heterojunction configurations under forward and reverse bias. The model shows the difference in using the continuous quasi-Fermi levels model as opposed to the thermionic emission model to determine the current transfer occurring between the different materials creating the junction under bias. The energy levels obtained with the model are then ...

Bipolar Transistor

This model shows how to set up a simple Bipolar Transistor model. The output current-voltage characteristics in the common-emitter configuration are computed and the common-emitter current gain is determined.

Breakdown in a MOSFET

MOSFETs typically operate in three regimes depending on the drain-source voltage for a given gate voltage. Initially the current-voltage relation is linear, this is the Ohmic region. As the drain-source voltage increases the extracted current begins to saturate, this is the saturation region. As the drain-source voltage is further increased the breakdown region is entered, where the current ...

MOSFET with mobility models

This model shows how to add several linked mobility models to the simple MOSFET example.

Schottky Contact

Schottky Contact This benchmark simulates the behavior of an ideal Schottky barrier diode made of a tungsten contact deposited on a silicon wafer. The resulting J-V (current density vs. applied voltage) curve obtained from the model under forward bias is compared with experimental measurements found in the literature

Small Signal Analysis of a MOSFET

This model shows how to compute the AC characteristics of a MOSFET. Both the output conductance and the transconductance are computed as a function of the drain current.

Caughey-Thomas Mobility in a Semiconductor

With an increase in the parallel component of the applied field, carriers can gain energies above the ambient thermal energy and be able to transfer energy gained by the field to the lattice by optical phonon emission. The latter effect leads to a saturation of the carriers mobility. The Caughey Thomas mobility model adds high field velocity scattering to an existing mobility model (or to a ...

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