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RFI and EMI - Contacts, Fingerstock and Gaskets

Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI) are two forms of interference that can cause damage to electronic circuits. These types of interference can originate from various sources, such as motors, lamps, and other potentially hazardous electrical equipment. To protect against RFI and EMI, contacts, fingerstock, and gaskets are essential components.Contacts provide a connection between two sources of electromagnetic noise. They can either be used as an isolator, to prevent the transmission of electromagnetic waves, or as a conductor, to ensure that electromagnetic waves can travel between the two sources. Contacts are typically made of copper or brass, and they may be plated with silver, nickel, or gold. The more contacts are used, the better the protection against RFI and EMI.Fingerstock, or metal strips, are an essential part of any circuit board. They are designed to act as an interface between the various components on the board and ensure that there is no buildup of electric charge. Fingerstock is typically made from aluminum or copper and is often plated with gold or nickel to further protect against EMI. The strips are usually arranged in an alternating pattern, with the ends of the strips facing away from each other.Gaskets are used to provide mechanical protection against RFI and EMI. They are typically made of rubber or plastic and are placed between components that are particularly susceptible to interference. Gaskets are designed to absorb vibrations and sound waves that can be emitted from motors or other electronic equipment. They also provide a buffer between metal components to reduce electrostatic charges and magnetic fields.The combination of contacts, fingerstock, and gaskets provide an effective way to protect electronic circuits from RFI and EMI. Contacts act as an isolator or a conductor as needed, while fingerstock and gaskets are used to absorb and deflect the energy from the interference. This combination of components ensures that the circuit can operate without interference.

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