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Constant innovation in radio-frequency interference, or RFI, and electromagnetic interference, or EMI, technologies has become increasingly important in the audio-video manufacture, military and aerospace industries. Products marketed for these industries must have certain performance requirements and specialized components that meet those needs. Contacts, fingerstock, and gaskets are three components commonly used contact-level EMI/RFI solutions.

Contacts

Contacts are typically used as part of a larger shielding system in applications where engineers need to make a mechanical and electrical connection between different components or shield pathways. Contacts are designed to minimize electrical resistance and provide a secure and reliable grounding connection. They are critical to providing a uniform connection and ensuring that an EMI/RFI shield\'s performance is up to standards in a given application.

There are different types of contacts available, including studs and puck contacts that can be used to secure a shield in place and provide a reliable electrical connection, as well as standoffs that provide for a standoff connection between two points. Contacts can be made from metals such as brass, steel, tin and zinc and they are sold as male and female components. Contacts can also be used in combination with flex panels and cable conductors for added shielding.

Fingerstock

Fingerstock is a conductive material used to provide a low-resistance contact connection between two components or surfaces. It is typically made from materials such as nickel, copper, brass, tin-plated steel, stainless steel, and aluminum. Fingerstock is designed to provide a solid mechanical connection and prevention of EMI/RFI signals from escaping, and it fits into gaps between panels, cable connectors, and enclosures.

Fingerstock is available in a variety of shapes and sizes to ensure the availability of the right fit for a given application. It is important to select the proper type and size for your specific application, as the contact protection against EMI/RFI signals will depend on the correct operation of the fingerstock. The fingerstock should also be inspected for signs of wear or damage prior to installation.

Gaskets

Gaskets are a type of flexible contact-level EMI/RFI shield used to provide physical and electrical protection. Gaskets are often used to replace the need for bulky and expensive shielding materials and provide a more affordable shielding solution. They are available in various shapes and sizes, and can be customized to fit a variety of applications.

Gaskets are made from materials such as nickel/copper, silver/nickel, and silver/copper. Different types of gaskets are used for different applications; for example, a high-temperature dielectric gasket can be used to provide EMI/RFI shielding in high temperature applications. Gaskets can also be used in conjunction with other materials, such as contacts and fingerstock, to provide additional shielding in more complex applications.

In summary, contacts, fingerstock, and gaskets are three common components used to provide contact-level EMI/RFI shielding solutions. These components are designed to fit various needs and are used in applications where reliable and secure contact-level shielding is necessary. When selecting these components, it is important to consider the requirements of the application, the materials available, and the methods of installation in order to ensure the optimum performance in the given application.

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