Stress analysis of spontaneous Sn whisker growth

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

71 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)269-281
Journal / PublicationJournal of Materials Science: Materials in Electronics
Volume18
Issue number1-3
Publication statusPublished - Mar 2007
Externally publishedYes

Abstract

Spontaneous Sn whisker growth is a surface relief phenomenon of creep, driven by a compressive stress gradient. No externally applied stress is required for the growth, and the compressive stress is generated within, from the chemical reaction between Sn and Cu to form the intermetallic compound Cu6Sn5 at room temperature. To obtain the compressive stress gradient, a break of the protective oxide on the Sn surface is required because the free surface of the break is stress-free. Thus, spontaneous Sn whisker growth is unique that stress relaxation accompanies stress generation. One of the whisker challenging issues in understanding and in finding effective methods to prevent spontaneous Sn whisker growth is to develop accelerated tests of whisker growth. Use of electromigration on short Sn stripes can facilitate this. The stress distribution around the vicinity and the root of a whisker can be obtained by using the micro-beam X-ray diffraction utilizing synchrotron radiation. A discussion of how to prevent spontaneous Sn whisker growth by blocking both stress generation and stress relaxation is given. © Springer Science+Business Media, LLC 2006.

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Citation Format(s)

Stress analysis of spontaneous Sn whisker growth. / Tu, K. N.; Chen, Chih; Wu, Albert T.
In: Journal of Materials Science: Materials in Electronics, Vol. 18, No. 1-3, 03.2007, p. 269-281.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review