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Radio-frequency interference (RFI) and electromagnetic interference (EMI) are two of the most common forms of interference experienced by electronic equipment. The contacts, fingerstock and gaskets used in such applications will determine the level of interference and its impact.

Fingerstock is a type of contact material composed of a non-metallic substrate impregnated with a variety of metals and/or conductive polymers. The combination of these layers creates a contact surface that is conductive, durable and highly resistant to corrosion. Fingerstock is ideal for use in applications with high levels of RFI and EMI, as it can effectively suppress the interference. Fingerstock is also useful in low-voltage applications as it has a low electrical resistance.

Gaskets are another type of contact material used in RFI and EMI applications. Gaskets are non-metallic elements specifically designed to provide a barrier between two metal surfaces. This barrier can prevent interference and/or electrical shorts. Gaskets used in RFI and EMI applications may be composed of various materials, including elastomers, plastics, textiles or fabrics. The material used to construct the gasket should be one that is highly resistant to corrosion and offers good electrical characteristics.

Contacts, fingerstock and gaskets are frequently used in the design of RFI and EMI shielded equipment. Contacts are metal or alloy components designed to facilitate the electrical connection between two distinct objects. Contacts are used to complete the electrical connection between the shield and circuitry, ensuring that any RFI or EMI is effectively contained. Contacts are specifically designed to be durable and corrosion-resistant, ensuring that the integrity of the electrical connection is maintained throughout the life of the equipment.

The working principle of RFI and EMI shielded equipment is extremely simple. A layer of further shielding material is applied over the individual components to form a barrier between them and the external environment. This shielding material can be composed of various materials including copper, aluminum, steel and even various plastics. The shielding material will prevent interference from entering the device, thus ensuring its performance. This type of shielding can be easily implemented in various applications, allowing for efficient and effective protection against interference.

RFI and EMI shielded equipment is widely used in various types of applications, ranging from automotive to industrial. In the automotive industry, such equipment is often used to protect on-board electronics from electrical interference, such as electrostatic discharge, from the environment. In the industrial sector, such equipment is often employed to protect sensitive machinery from interference.

In conclusion, contacts, fingerstock and gaskets play an important role in the design of RFI and EMI shielded equipment. The contacts are used to complete the electrical connection between the circuitry and the shield, while the fingerstock and gaskets are used to provide a barrier between two metal surfaces. Additionally, the shielding material is applied over the components to provide further protection against outside interference. These materials are essential in ensuring the performance and reliability of any RFI and EMI shielded equipment.

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