Current Problems and Possible Solutions in High-Temperature Lead-Free Soldering

0386299 - ÚFM 2013 RIV US eng J - Journal Article
Kroupa, Aleš - Andersson, D. - Hoo, N. - Pearce, J. - Watson, A. - Dinsdale, A. - Mucklejohn, S.
Current Problems and Possible Solutions in High-Temperature Lead-Free Soldering.
Journal of Materials Engineering and Performance. Roč. 21, č. 5 (2012), s. 629-637. ISSN 1059-9495. E-ISSN 1544-1024
Institutional support: RVO:68081723
Keywords : lead-free soldering, * materials for high-temperature LF * new technologies for HT lead-free soldering
Subject RIV: BJ - Thermodynamics
Impact factor: 0.915, year: 2012

The substitution of lead in the electronics industry is one of the key issues in the current drive towards ecological manufacturing. Legislation has already banned the use of lead in solders for mainstream applications (T M ≈ 220 °C), but the use of lead in the solders for high-temperature applications (>85% lead, T M ≈ 250-350 °C) is still exempt in RoHS2. The search for proper substitutes has been ongoing among solder manufacturers only for a decade without finding a viable low cost alternative and is the subject of intensive research. This article tries to map the current situation in the field of high-temperature lead-free soldering, presenting a short review of current legislation, requirements for substitute alloys, and finally it describes some existing solutions both in the field of promising new materials and new technologies. Currently, there is no drop-in replacement for lead-containing solders and therefore both the new materials and the new technologies may be viable solutions for production of reliable lead-free joints for high-temperature applications.
Permanent Link: http://hdl.handle.net/11104/0215630