0077001015

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RFI and EMI - Contacts, Fingerstock and Gaskets

Radio Frequency Interference (RFI) and Electro Magnetic Interference (EMI) are two important phenomena which can affect the performance of electronic equipment. These interference phenomena are caused by the electric current induced in a conductor which comes into contact with a corresponding electrical source. Accordingly, to ensure high-quality operation, electronic equipment must be provided with proper shielding or grounding against the harmful effects of RFI and EMI.

The 0077001015 application field and working principle can be used to provide protection to electronic equipment from the damaging productions of RFI and EMI. In this application field, contacts, fingerstock, and gaskets are used to provide an electrical circuit or to isolate two bodies from one another.

Contacts refer to the actual components involved in providing electrical connections in a circuit. These components can be electrical accessible contacts, (such as soldered contacts) to solid contacts for isolated electrical grounding. Contacts are not only used for providing electrical paths but for providing protection against EMI interference as well. The application of contacts should be assessed based on the electrical environment and the potential of a change in the environment.

Fingerstock refers to metal strips, or segments, arranged on a single substrate to form a pattern of points of contact. Such metal strips are usually made of copper, nickel or silver and are designed to provide electrical isolation to the components and structures of electronic equipment from the ground and EMI environment. Fingerstock devices are used primarily for low-voltage applications and are also referred to as “finger strips”.

Gaskets, on the other hand, refer to the thin, pliant sheet of material, usually rubber or silicone, which is placed around electrical components and connectors to provide an air-tight seal. This seal isolates the electrical components inside from the EMI producing environment outside. In order to effectively dissipate the EMI produced in the environment, the gasket should be of low-resistance and thus should be designed with pliable conductive metal mesh which should also be in contact with the chassis ground.

The 0077001015 application field and working principle is extremely helpful in providing protection to electrical equipment against the harmful effects of RFI and EMI. By using the proper combination of contacts, fingerstock and gaskets, an effective EMI and RFI shield can be provided that will ensure high-quality performance.

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