Accession Number:

ADA242683

Title:

Calculation of Phase Diagrams for Metal-GaAs Systems

Descriptive Note:

Interim rept. Jan 90-Jan 91,

Corporate Author:

DAYTON UNIV OH RESEARCH INST

Report Date:

1991-10-01

Pagination or Media Count:

37.0

Abstract:

This report describes the analytical methods utilized in the development of a computer model for the calculation of Metal-Ga-As ternary phase diagrams. The regular solution theory of alloying behavior has been used to model the free energy functions for the ternary systems of interest. Ternary phase diagrams for the Au, Ag, and Ge metals with GaAs have been calculated and are presented. The purpose of this work is to provide an analytical tool for use determining the feasibility of candidate alloys for high temperature stability, when used as ohmic contacts to GaAs electronic devices. Subsequent work will be to empirically determine the accuracy and correctness of the computer model and the expansion to allow the addition of a fourth element and accurately model quaternary phase equilibrium diagrams involving GaAs semiconducting material.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE