Fast forecasting of VGF crystal growth process by dynamic neural networks

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

Fast forecasting of process variables during the crystal growth is a critical step in a process development, optimization and control. The common approach based on computational fluid dynamics modeling is accurate, but too slow to deliver results in real time. Here we conducted a feasibility study on the application of dynamic artificial neural networks in the forecasting of VGF-GaAs crystal growth cooling program. Particularly, we studied various Nonlinear-AutoRegressive artificial neural networks with eXogenous inputs (NARX) with 2 external inputs and 6 outputs derived from 500 transient data sets. Data were generated by transient 1D CFD simulation. The first encouraging results are presented and the pros and cons of the application of dynamic artificial neural networks for the fast predictions of VGF process parameters are discussed.

Details

Original languageEnglish
Pages (from-to)9 - 14
JournalJournal of crystal growth
Volume521
Publication statusPublished - 2019
Peer-reviewedYes

External IDs

Scopus 85066255424
ORCID /0000-0002-4911-1233/work/142252542

Keywords

Keywords

  • A1. Computer simulation, A1. Fluid flows, A2. Gradient freeze technique