Finger stocks, all about them

Fingerstocks, also known as finger gaskets or fingerstrips, are components used in electronics and electrical applications for EMI/RFI (electromagnetic interference/radio frequency interference) shielding and grounding purposes.

Fingerstocks are typically made of highly conductive materials, such as metal or metal-plated elastomers, and are designed to be flexible and resilient. They consist of a series of closely spaced, elongated fingers or contact points arranged in a continuous strip or gasket form. These fingers are compressed between two mating surfaces or connected to a conductive surface to provide a continuous electrical connection.

The primary function of fingerstocks is to provide a conductive path that helps to block or minimize the transfer of electromagnetic interference between different electronic components or compartments. By forming a continuous grounding or shielding connection, they help reduce the risk of signal interference or disruption caused by external electromagnetic sources or prevent internal emissions from interfering with other sensitive electronics.

Fingerstocks are commonly used in applications such as electronic enclosures, cabinets, connectors, circuit boards, and other electronic equipment where effective EMI/RFI shielding is required. They are available in various sizes, materials, and configurations to suit different application requirements and can be customized to fit specific designs or specifications.

Where can you buy Fingerstocks?

Fingerstocks can be purchased from various sources, including electronics suppliers, specialized EMI/RFI shielding manufacturers, and online retailers. Here are a few places where you can buy fingerstocks:

Electronics Suppliers: Local electronics stores or distributors that carry electronic components and accessories may have fingerstocks available for purchase. These suppliers often cater to professionals in the electronics industry and can provide guidance on selecting the right fingerstocks for your specific needs.

EMI/RFI Shielding Manufacturers: Companies that specialize in EMI/RFI shielding solutions often offer a wide range of fingerstocks. These manufacturers typically have a comprehensive selection of shielding materials and components, including fingerstocks, and can provide technical expertise to assist with your requirements. Some notable manufacturers in this field include Laird Technologies, Parker Chomerics, and Tech-Etch.

Online Retailers: Various online platforms and retailers offer fingerstocks for sale. Websites like Digi-Key, Mouser Electronics, and Newark provide a wide selection of electronic components and often carry fingerstocks in their inventory. Online marketplaces such as Amazon and eBay may also have listings for fingerstocks from various sellers.

Specialty EMI/RFI Shielding Stores: There are online stores that specifically focus on EMI/RFI shielding products, and they are likely to carry fingerstocks as part of their offerings. These stores may provide a more specialized selection and expertise in EMI/RFI shielding solutions. Examples of such stores include EMI Solutions, EMI-Shield, and Leader Tech Inc.

When purchasing fingerstocks, it’s important to consider factors such as the material, dimensions, and specifications that suit your specific application requirements. It may be helpful to consult with the supplier or manufacturer to ensure you choose the appropriate fingerstocks for your intended use.

Are fingerstocks used in computers?

Yes, fingerstocks can be used in computers and other electronic devices. They are commonly employed in electronic enclosures, connectors, and other components to provide EMI/RFI shielding and grounding. Here are a few examples of how fingerstocks are used in computers:

1. Computer Enclosures: Fingerstocks are often used in the construction of computer enclosures to create a conductive seal between the enclosure’s panels or doors. They help to prevent electromagnetic interference from entering or exiting the enclosure, protecting the sensitive electronic components inside.
2. Connector Gaskets: Fingerstocks can be used as gaskets in connectors to establish a continuous grounding connection between mating parts. They provide EMI shielding and help maintain the integrity of the electrical signals passing through the connectors.
3. Printed Circuit Boards (PCBs): Fingerstocks may be employed on PCBs to provide grounding and shielding. They can be used as grounding clips or placed around sensitive components to reduce the risk of electromagnetic interference affecting nearby circuitry.
4. Rack-Mounted Equipment: In server racks or cabinets, fingerstocks can be used to ensure proper grounding and shielding between different devices or panels. They help to minimize electromagnetic interference and maintain signal integrity in densely populated equipment environments.

The specific usage of fingerstocks in computers may vary depending on the design, application, and desired level of EMI/RFI protection. Manufacturers and designers incorporate fingerstocks to enhance electromagnetic compatibility and reduce the risk of interference that could impact the performance or reliability of computer systems and components.