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

被引：14

作者：

Verdingovas, Vadimas ^{[1
,2
]}

Mueller, Lutz ^{[2
]}

Jellesen, Morten Stendahl ^{[1
]}

Grumsen, Flemming Bjerg ^{[1
]}

Ambat, Rajan ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Mech Engn, Mat & Surface Engn, DK-2800 Lyngby, Denmark

[2] Robert Bosch GmbH, Automot Elect, DE-72762 Reutlingen, Germany

来源：

CORROSION SCIENCE | 2015年 / 97卷

关键词：

A; Aluminium; A. Electronic materials; Intermetallics; B; Polarisation; B. X-ray diffraction; C; Interfaces; FAILURE MECHANISMS; DEGRADATION; BROMINE;

D O I：

10.1016/j.corsci.2015.05.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees 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. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：161 / 171

页数：11

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