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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a183839.pdf


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