Accession Number : ADA183839

Title :   Chemical Reactions at the in vacuo Au/InP Interface.

Descriptive Note : Technical rept. no. 5, Oct 86-Aug 87,

Corporate Author : CALIFORNIA UNIV LOS ANGELES

Personal Author(s) : Williams,R S ; Tsai,C T ; Cirlin,Eun-Hee

PDF Url : ADA183839

Report Date : 25 Jul 1987

Pagination or Media Count : 9

Abstract : The reaction between a gold film and an indium phosphide substrate occurs much more readily in vacuo than under an atmosphere pressure of an inert gas. At high pressures, the compounds Au2P3 and the Y intermetallic compound (at times designated Au7In3, Au9In4, or Au2In) are formed at 450 C and remain fairly stable even when annealed at 500 C for hours. Under ultra-high vacuum conditions, phosphorus readily escapes from the film when a sample is annealed at 300 C for 15 minutes, and the major reaction products are the psi phase (Au3In2) and an unidentified Au-InP behaves more like a closed thermodynamic system under pressure than in a vacuum. Keywords: Phosphorus escape, Composition shift, Layered islands, Four solid phases, Ternary phase diagram, Intense reflections.

Descriptors :   *GOLD, *INDIUM PHOSPHIDES, *CHEMICAL REACTIONS, *THERMOCHEMISTRY, BAROMETRIC PRESSURE, THERMODYNAMICS, FILMS, SUBSTRATES, PHOSPHORUS, PHASE DIAGRAMS, SOLID PHASES, HIGH PRESSURE, INTERMETALLIC COMPOUNDS, REACTANTS(CHEMISTRY), ULTRAHIGH VACUUM, THIN FILMS, ANNEALING, RARE GASES, SUBLIMATION, TERNARY COMPOUNDS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE