Whisker Formation On Galvanic Tin Surface Layer

• Autorzy: Radanyi A. L. , Sycheva A. , Gacsi Z.

Identyfikatory

DOI

10.1515/amm-2015-0127

Warianty tytułu

PL

Tworzenie whiskerów na powierzchniowej warstwie cyny wytworzonej galwanicznie

• Języki publikacji: EN

Abstrakty

EN

The present work reports the effect of substrate composition, thickness of the tin electroplate and its morphology on pressure-induced tin whisker formation. Pure tin deposits of different thickness were obtained on a copper and brass substrates using methane sulfonic industrial bath. The deposits were compressed by a steel bearing ball forming imprint on the surface. The microstructure of tin whiskers obtained at the boundary of each imprint, their length and number were studied using both light and scanning electron microscopy. It was shown that the most intensive formation and growth of whiskers was observed in the first two hours. In general, brass substrate was shown to be more prone to whisker formation than copper independently of the tin coating thickness. The results have been compared with industrial bright tin finish on control unit socket leads and proposals have been made as to modification of the production process in order to minimize the risk of whiskering.

Słowa kluczowe

EN

tin whiskers; galvanic tin layer; mechanical stress; X-ray fluorescence spectrometry; scanning electron microscopy

PL

wiskery cynowe; galwaniczne powłoki cynkowe; naprężenia mechaniczne; rentgenowska spektroskopia fluorescencyjna; mikroskop skaningowy (SEM)

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 2B
• Strony: 1341--1345
• Opis fizyczny: Bibliogr. 18 poz., rys.

Twórcy

autor

Radanyi A. L.

• Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, Miskolc, Hungary

autor

Sycheva A.

• MTA-ME Materials Science Research Group, Hungarian Academy of Sciences, Miskolc, Hungary

autor

Gacsi Z.

• Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, Miskolc, Hungary

Bibliografia

• [1] E. R. Crandall, Factors Governing Tin Whisker Growth, Switzerland 2013.
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• [3] G. T. Galyon, A History of Tin Whisker Theory: 1946 to 2004, in: STMA International Conference, Chicago (2004).
• [4] http://www.calce.umd.edu/tin-whiskers/TINWHISKERFAILURES.pdf.
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• [11] E. Chason, N. Jadhav, F. Pei, E. Buchovecky, A. Bower, Prog. Surf. Sci. 88, 103 (2013).
• [12] B.-Z. Lee, D. N. Lee, Acta Mater. 46, 3701 (1998).
• [13] B. Horváth, B. Illés, T. Shinohara, G. Harsányi, Thin Solid Films 520, 384 (2011).
• [14] E. Chason, N. Jadhav, F. Pei, JOM 63, 62 (2011).
• [15] D. Koncz-Horváth, Z. Gácsi, Mater. Sci. Forum 752, 37 (2013).
• [16] A. Sycheva, A. Radanyi, Z. Gacsi, Mater. Sci. Forum 790-791, 271 (2014).
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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.