Original title: 2D Physical Modelling of Semiconductor Equations for Verification of 1D Lumped-Charge Model of Bipolar Power Devices
Authors: Mikláš, Jan ; Procházka, Petr
Document type: Papers
Language: eng
Publisher: Vysoké učení technické v Brně, Fakulta elektrotechniky a komunikačních technologií
Abstract: The paper demonstrates a finite-element method(FEM) simulation model of semiconductor devices operation.Classical semiconductor equations employing drift, diffusionand generation-recombination transport of charge carriers areestablished and variational forms for FEM assembly are derivedin detail, including a basic voltage and current boundary conditions.Mathematically, a system of mutually coupled nonlinearequations need to be solved, which requires extensive use ofnonlinear iteration solver. The derived model was coded inPython by strict use of open source tools, mainly grouped aroundFEniCSx project. Graphic output figures and characteristics forbasic semiconductor structures are presented to demonstrate thefunctionality of model.An ultimate goal of presented effort is derivation and verificationof simplified semi-analytical model of Insulated-gate bipolartransistor (IGBT), including precise transient behavior.This kind of model should be calibrated by use ofmeasurement-obtained data, so the qualitative behavior of devicephysics at reasonable computational cost is of primary interestof presented FEM model as opposed to commercial devicedevelopment tools aiming at precise quantitative outputs; whichneed to be experimentally calibrated even so.As an additional step to simplified one-dimensional modelusability verification, results of unusual way of experimentalestimation of minority-carrier excess charge within power bipolartransistor collector and base during on-state is presented andcompared to simulation result.
Keywords: finite element method; IGBTtransient model; lumped chargemodel; power BJT switching; Power BTJ model; semiconductordevice simulation; transistor switching measurement
Host item entry: Proceedings II of the 29st Conference STUDENT EEICT 2023: Selected papers, ISBN 978-80-214-6154-3, ISSN 2788-1334

Institution: Brno University of Technology (web)
Document availability information: Fulltext is available in the Brno University of Technology Digital Library.
Original record: http://hdl.handle.net/11012/210686

Permalink: http://www.nusl.cz/ntk/nusl-531792


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