Autonomous Control System for Czochralski Growth of LEC GaAs

Abstract

The consolidation of the Czochralski Growth Control System(CGCS) is a revision of the hardware and software within the constraints of the first generation. The consolidation consists of: a cabinet that is physically more compatible with the Cambridge console; a more modular hardware arrangement that facilitates calibration, servicing, and expansion; increased accuracy and stability of the system variable measurements; and many software enhancements, including increased controller flexibility and improved diameter estimation and control. The hardware and software installation has been completed and crystal growth with complete digital control has been demonstrated. Keywords: Liquid encapsulated crystal; Single crystal; Crystal growth; Gallium arsenide.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1989
Accession Number
ADA210190

Entities

People

  • B. Luger
  • G. H. Schwuttke
  • R. C. White

Organizations

  • Arizona State University

Tags

Communities of Interest

  • Advanced Electronics
  • Autonomy

DTIC Thesaurus Topics

  • Accuracy
  • Analog Signals
  • Calibration
  • Central Processing Units
  • Computers
  • Consoles
  • Control Systems
  • Converters
  • Crystal Growth
  • Crystals
  • Diameters
  • Frequency
  • Measurement
  • Operating Systems
  • Resilience
  • Steady State
  • Two Dimensional

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Materials Science and Engineering.
  • Robotics and Automation.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems