Effect of iodine on the corrosion of Au-Al wire bonds

Vadimas Verdingovas; Lutz Müller; Morten Stendahl Jellesen; Flemming Bjerg Grumsen; Rajan Ambat

doi:10.1016/j.corsci.2015.05.003

Effect of iodine on the corrosion of Au-Al wire bonds

Vadimas Verdingovas, Lutz Müller, Morten Stendahl Jellesen, Flemming Bjerg Grumsen, Rajan Ambat

Robert Bosch GmbH

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Abstract

Corrosion study was performed on Au-Al wire bonds, thin layers of sputter deposited Au and Al, and Au-Al intermetallic nuggets. The test environment was iodine-vapour in air (1. mg/L) at 85 °C with varying relative humidity, and 500 mg/L of KI in water. GDOES, XRD, SEM EDS, wire bond shear, and electrochemical testing were used to characterize the samples. Failures of Au-Al wire bonds were found to be primarily attributed to the corrosion of Al via formation of Al iodides and consequent formation of Al oxides and/or hydroxides. Most susceptible to corrosion are Al metallization and Al rich intermetallic phases.

Original language	English
Journal	Corrosion Science
Volume	97
Pages (from-to)	161-171
ISSN	0010-938X
DOIs	https://doi.org/10.1016/j.corsci.2015.05.003
Publication status	Published - 2015

Keywords

A. Aluminium
A. Electronic materials
A. Intermetallics
B. Polarisation
B. X-ray diffraction
C. Interfaces

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title = "Effect of iodine on the corrosion of Au-Al wire bonds",

abstract = "Corrosion study was performed on Au-Al wire bonds, thin layers of sputter deposited Au and Al, and Au-Al intermetallic nuggets. The test environment was iodine-vapour in air (1. mg/L) at 85 °C with varying relative humidity, and 500 mg/L of KI in water. GDOES, XRD, SEM EDS, wire bond shear, and electrochemical testing were used to characterize the samples. Failures of Au-Al wire bonds were found to be primarily attributed to the corrosion of Al via formation of Al iodides and consequent formation of Al oxides and/or hydroxides. Most susceptible to corrosion are Al metallization and Al rich intermetallic phases.",

keywords = "A. Aluminium, A. Electronic materials, A. Intermetallics, B. Polarisation, B. X-ray diffraction, C. Interfaces",

author = "Vadimas Verdingovas and Lutz M{\"u}ller and Jellesen, {Morten Stendahl} and Grumsen, {Flemming Bjerg} and Rajan Ambat",

year = "2015",

doi = "10.1016/j.corsci.2015.05.003",

language = "English",

volume = "97",

pages = "161--171",

journal = "Corrosion Science",

issn = "0010-938X",

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TY - JOUR

T1 - Effect of iodine on the corrosion of Au-Al wire bonds

AU - Verdingovas, Vadimas

AU - Müller, Lutz

AU - Jellesen, Morten Stendahl

AU - Grumsen, Flemming Bjerg

AU - Ambat, Rajan

PY - 2015

Y1 - 2015

N2 - Corrosion study was performed on Au-Al wire bonds, thin layers of sputter deposited Au and Al, and Au-Al intermetallic nuggets. The test environment was iodine-vapour in air (1. mg/L) at 85 °C with varying relative humidity, and 500 mg/L of KI in water. GDOES, XRD, SEM EDS, wire bond shear, and electrochemical testing were used to characterize the samples. Failures of Au-Al wire bonds were found to be primarily attributed to the corrosion of Al via formation of Al iodides and consequent formation of Al oxides and/or hydroxides. Most susceptible to corrosion are Al metallization and Al rich intermetallic phases.

AB - Corrosion study was performed on Au-Al wire bonds, thin layers of sputter deposited Au and Al, and Au-Al intermetallic nuggets. The test environment was iodine-vapour in air (1. mg/L) at 85 °C with varying relative humidity, and 500 mg/L of KI in water. GDOES, XRD, SEM EDS, wire bond shear, and electrochemical testing were used to characterize the samples. Failures of Au-Al wire bonds were found to be primarily attributed to the corrosion of Al via formation of Al iodides and consequent formation of Al oxides and/or hydroxides. Most susceptible to corrosion are Al metallization and Al rich intermetallic phases.

KW - A. Aluminium

KW - A. Electronic materials

KW - A. Intermetallics

KW - B. Polarisation

KW - B. X-ray diffraction

KW - C. Interfaces

U2 - 10.1016/j.corsci.2015.05.003

DO - 10.1016/j.corsci.2015.05.003

M3 - Journal article

SN - 0010-938X

VL - 97

SP - 161

EP - 171

JO - Corrosion Science

JF - Corrosion Science

ER -

Effect of iodine on the corrosion of Au-Al wire bonds

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Keywords

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