Moisture poses a significant threat to the reliability of microelectronic assemblies and can be attributed as being the principal cause of many premature package failures. Of particular concern is characterizing the role of moisture with respect to the acceleration of the onset of package delamination. In this paper the effect of moisture on the interfacial fracture toughness of two no-flow underfill materials with a commercially available solder mask coated FR-4 board is experimentally determined. Bilayer specimens with prefabricated interface cracks are used in a four-point bend test to quantify the interfacial fracture toughness. Two groups of test specimens of varying underfill thickness were constructed. The first group was fully dried while the other was moisture preconditioned at 85°C/85%RH for 725 hours. The results of this study show that the interfacial toughness is significantly affected by the presence of moisture.
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e-mail: gte331r@prism.gatech.edu
e-mail: jianmin.qu@me.gatech.edu
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June 2002
Technical Papers
Effect of Moisture on the Interfacial Adhesion of the Underfill/Solder Mask Interface
Timothy Ferguson, Member ASME,
e-mail: gte331r@prism.gatech.edu
Timothy Ferguson, Member ASME
Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
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Jianmin Qu, Fellow ASME
e-mail: jianmin.qu@me.gatech.edu
Jianmin Qu, Fellow ASME
Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Search for other works by this author on:
Timothy Ferguson, Member ASME
Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
e-mail: gte331r@prism.gatech.edu
Jianmin Qu, Fellow ASME
Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
e-mail: jianmin.qu@me.gatech.edu
Contributed by the Electronic and Photonic Packaging Division for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received by the EPPD July 12, 2000; revised manuscript received April 24, 2001. Associate Editor: J. Lau.
J. Electron. Packag. Jun 2002, 124(2): 106-110 (5 pages)
Published Online: May 2, 2002
Article history
Received:
July 12, 2000
Revised:
April 24, 2001
Online:
May 2, 2002
Citation
Ferguson, T., and Qu, J. (May 2, 2002). "Effect of Moisture on the Interfacial Adhesion of the Underfill/Solder Mask Interface ." ASME. J. Electron. Packag. June 2002; 124(2): 106–110. https://doi.org/10.1115/1.1414133
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