Academic Journal
The Effect of Multiple Solder Reflows on the Formation of Cu6Sn5 Intermetallics and the Decomposition of SnAg3.0Cu0.5 Solder Joints in the Framework of Rework and Reuse of MLCC Components
| العنوان: | The Effect of Multiple Solder Reflows on the Formation of Cu6Sn5 Intermetallics and the Decomposition of SnAg3.0Cu0.5 Solder Joints in the Framework of Rework and Reuse of MLCC Components |
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| المؤلفون: | Wiss, Erik, Wiese, Steffen |
| بيانات النشر: | Saarländische Universitäts- und Landesbibliothek |
| سنة النشر: | 2024 |
| المجموعة: | SciDok - Der Wissenschaftsserver der UdS (Universität des Saarlandes) |
| مصطلحات موضوعية: | ddc:500, Cu6Sn5 intermetallic, intermetallic morphology, reflow, solder, SnAg3.0Cu0.5, multiple reflows, reuse, MLCC, shear test |
| الوصف: | A rework of electronic assemblies and the reuse of electronic components are the most effective ways to reduce electronic waste. Since neither components nor substrates were developed with the intention of multiple usage, the question of how the integrity of lead-free solder joints is affected by multiple reflow operations is crucial for the implementation of any reuse strategy. Therefore, various types of 1206 multilayer ceramic capacitors (MLCCs) differing in their capacitance value and dielectric type (X5R, X7R, Y5V, NP0) were soldered on test printed circuit boards (PCBs) having a pure Cu-metallization surface in order to investigate the intermetallic reactions during multiple reflows. The metallization system on the MLCC-component side consisted of a thick film of Ni covered by galvanic-deposited Sn. The reflow experiments were conducted using a hypoeutectic SnAgCu solder. The results show the formation of a Cu6Sn5 intermetallic phase on both metallizations, which grows homogeneously with the number of reflows. Moreover, an ongoing decomposition of the solder into Ag-enriched and depleted zones was observed. The effect of these microstructural changes on the functionality of the solder joint was investigated by mechanical shear experiments and electrical four-point capacitance measurements. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | German |
| Relation: | Metals 14 (9): 986 (2024); hdl:20.500.11880/38686 |
| DOI: | 10.22028/D291-42999 |
| DOI: | 10.3390/met14090986 |
| الاتاحة: | http://nbn-resolving.org/urn:nbn:de:bsz:291--ds-429997 https://doi.org/10.22028/D291-42999 https://doi.org/10.3390/met14090986 |
| Rights: | openAccess ; Attribution 4.0 International CC BY 4.0 Deed ; https://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.30D6E1DA |
| قاعدة البيانات: | BASE |
| DOI: | 10.22028/D291-42999 |
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