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
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