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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BJ - Termodynamika

OECD FORD obor

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Projekt

<a href="/cs/project/GAP204%2F10%2F1784" target="_blank" >GAP204/10/1784: Modelování difúzních fázových transformací v mnohasložkových systémech s mnoha stechiometrickými fázemi</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Acta Materialia

ISSN

1359-6454

e-ISSN

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Svazek periodika

59

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

7634-7644

Kód UT WoS článku

000297822200021

EID výsledku v databázi Scopus

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