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:

1987-07-25

Pagination or Media Count:

9.0

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