TDK's Guide to Electrically Conductive Adhesives (2): Why should I use conductive epoxy?
  • Kondensatoren
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  • Keramik-Vielschichtkondensatoren (MLCC)

A. Conductive epoxies are mainly used in applications where the risks of mechanical and thermal cracking are very high, as well as when there are concerns about damaging heat sensitive components on the PCB during soldering.

Although tin/lead solders have been widely used for many years, leaded solders are becoming much less frequently used because of concerns over lead's toxicity. Unfortunately, unleaded solders have higher melting points, and because of this, sensitive electrical components near the solder joint can be damaged during the soldering process.

Another issue with lead-free solder is that it is less elastic than leaded solder. This means that lead-free solder joints will be more brittle and more susceptible to developing cracks than with lead-based solder, especially during temperature cycling.

Conductive epoxies are an alternative to leaded and unleaded solders. They have low curing temperatures, reducing the risk that heat sensitive components will be damaged during manufacturing, and they are more resilient to thermal and mechanical stress.

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