Sealing against EMI and the environment

摘要

EMC gaskets are available with combinations of properties to address virtually any application. Metal finger stock made from beryllium-copper (BeCu) or stainless steel (Figure 1) is a very effective, proven type of gasket but does not provide a seal against dust or moisture. Because each finger moves independently to make electrical contact, the effective gap length is very short, ensuring good high-frequency performance. Gaskets based on elastomers, either filled with conductive particles or covered with conductive material, are made in many profiles and can be good solutions, especially if a dust and moisture seal also is required.