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RF (Radio Frequency) and EM (Electromagnetic) Interference constitute environmental forces which may directly or indirectly affect the performance of electronic equipment. These two forms of interference are the result of electromagnetic radiation. RFI and EMI work together to create interference that can degrade the performance of electronic equipment.

Radiation-induced losses along with very high frequencies, can cause permanent degradation of the equipment, including random losses, frequency shifts, and fluctuations in signal quality. On the other hand, EMI, which is the result of the generation of higher frequency waves, can cause malfunctioning of the equipment if not addressed properly. This is why it is important to select the right type of contact and gasket material to protect the equipment from RFI and EMI.

Contacts, fingerstock and gaskets play an important role in controlling RFI/EMI in electronic equipment. The contact material\'s properties, such as shielding effectiveness, electrical characteristics, and resistance to corrosion and wear, are important factors when selecting the best material for this application.

In terms of RFI/EMI protection, a contact between the shell and the back of the PCB provides an efficient ground connection between the equipment and the outside environment. The contact should have a low resistance and be able to maintain a dependable electrical connection. The contact interface should also have no air gap between itself and the back of the PCB to ensure maximum shielding.

Fingerstock is also important in providing RF protection. Materials such as beryllium copper and phosphor bronze are recommended to ensure the highest efficiency in preventing damage from electromagnetic interference. The fingerstock should be positioned around the circumference of the contact for greater protection against RF/EMI.

In addition to contacts and fingerstock, gaskets made of conductive material can also help to protect against RFI/EMI. They are placed between the shell and the PCB to maintain a strong connection between both parts of the device. Gaskets made of conductive elastomers are ideal for this application, as they are able to provide excellent shielding against electromagnetic interference.

In conclusion, contacts, fingerstock, and gaskets play an important role in controlling RFI/EMI in electronic equipment.The material chosen for each component must provide excellent shielding against RFI/EMI interference in order to protect the equipment from serious damage and maximize its performance.

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