Fadil, Nor Akmal and Yusof, Siti Zahira and A. B. Kahar, Mohamad Nawawi and Abu Bakar, TutyAsma (2015) Effect of external stresses by bending on Sn whiskers formation and growth on immersion Sn surface finish. In: The World Virtual Conference on Applied Sciences and Engineering Applications, 27-29 March, 2015, Johor Bahru, Malaysia.
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Official URL: http://www.akademiabaru.com/conference.html
Abstract
Deposited tin (Sn) layers used as lead-free solderable finish on the semiconductor devices are known to form whiskers. These whiskers are single crystal of tin that spontaneously grows from the surface of tin within weeks to years. Thus, they can cause shorts and the failure of a whole electronic circuit. In this research, the effect of external stresses applied by bending on the Sn whiskers formation and growth was investigated on immersion Sn surface finish. The plating time was 10 minutes to produce 1.4 µm coating thickness on the copper substrate and exposed for 1, 4, and 8 weeks under the environment of 30°C/60%.RH for bended and non-bended samples. It was found that the non-bended Sn surface has uniform Sn whiskers distributed on the entire surface. Unlike the non- bended Sn surface, the Sn whiskers has been formed more and grown longer at lower stresses region of the bended surface than higher stresses region based on the micrograph observed by field emission scanning electron microscopy (FESEM).
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | bending, copper substrate |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Mechanical Engineering |
| ID Code: | 63451 |
| Deposited By: | Fazli Masari |
| Deposited On: | 30 May 2017 03:46 |
| Last Modified: | 30 May 2017 03:46 |
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