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
收藏
页码：161 / 171
页数：11
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