A Finite-Element Program for Modeling Transient Phenomena in GaAs MESFET's

Peter R.H. Riemenschneider, Peter R.H. Riemenschneider, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A two-dimensional finite-element program has been developed for analyzing transient and steady-state characteristics of GaAs devices with arbitrary geometric boundary shapes. The program code consists of two separate programs, GRID and FET, which are discussed in some detail. GRID serves to generate a nonuniform mesh, while FET computes a self-consistent solution of Poisson's and the current continuity equations. A GaAs FET with a trapezoidal recessed gate structure has been studied to demonstrate the capabilities of the program to analyze odd shapes. Current–voltage characteristics were computed for the recessed gate and a planar device. The results from both FET structures are compared and analyzed. In particular the effect of the recessed gate on the field distribution in the device is discussed. Large signal transient behaviors of both devices were examined, and it was found that both device structures produce similar results in steady-state and transient conditions.

Original languageEnglish
Pages (from-to)1142-1150
Number of pages9
JournalIEEE Transactions on Electron Devices
Issue number9
Publication statusPublished - 1983 Sept

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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