Diffusion kinetics in aluminium?gold bond contacts from first-principles density functional calculations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F11%3A00369671" target="_blank" >RIV/68081723:_____/11:00369671 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Diffusion kinetics in aluminium?gold bond contacts from first-principles density functional calculations

Original language description

A common joining method in microelectronics is thermosonic bonding of gold wires to aluminium pads deposited on the integrated circuit. In the interface between the wire and the pad a number of intermetallic compounds AlxAuy can develop, which significantly affect the mechanical properties and corrosion resistance of the bonds. Based on Onsager?s extremal principle of irreversible thermodynamics, the present paper describes the evolution of the intermetallic phases. This macroscopic model contains several thermodynamic and kinetic parameters, some of which are not available from databases. As an alternative to often cumbersome experiments, density functional theory is applied to calculate the formation energies of the phases and of atomic vacancies, aswell as the vacancy migration energies in AlAu4. To derive tracer diffusion coefficients from the atomistic vacancy jump rates, one must take peculiarities of the AlAu4 lattice into account: the vacancy migration energy between certain g

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BJ - Thermodynamics

OECD FORD branch

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Project

<a href="/en/project/GAP204%2F10%2F1784" target="_blank" >GAP204/10/1784: Modelling of diffusional phase transformations in multicomponent systems with multiple stoichiometric phases</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2011

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Materialia

ISSN

1359-6454

e-ISSN

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Volume of the periodical

59

Issue of the periodical within the volume

20

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

7634-7644

UT code for WoS article

000297822200021

EID of the result in the Scopus database

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