The Importance of Gasket Junction Design

Ideally, EMI gasketing surfaces will be both rigid and recessed, as to house the gasket completely. The surface should also be as conductive as possible, while also maintaining high levels of corrosion resistance. For devices that will have inevitable reactions to the environment, products should also be easily penetrable by mechanical abrasion and electrically conductive. Because of the many factors, it is common for gasket design to fail. The mating surface requires as much attention and care as the selection of the gasketing material.

A gasket is necessary when imperfect surfaces exist. When surfaces with perfect junctions exist, no gaskets are required. Imperfect mating surfaces are in critical need of a gasket. Without it, devices would not function properly.

Creating perfect surfaces is usually expensive. To make an ideal surface, the device must have a solidly welded closure. Other options include mating surfaces that are perfectly flat, infinitely stiff, or with infinite conductivity that goes across the entire junction.  Using EMI gaskets is a great way to reduce costs while maintaining high levels of EMI and RFI protection.

EMI RFI Shielding

The most important property that makes conductive elastomer gaskets a durable EMI seal is its capacity to consistently provide high levels of electrical conductivity across the gasket flange interface. As conformability and conductivity levels get higher, the shielding effectiveness goes up as well. Testing has shown that the surface conductivity of the mating surface and gaskets are the most important properties that make a gasketed seam useful. Trust EMI shields and RFI shields.

• Where Does Electric Magnetic Interference Come From?
  Be smart and protect your equipment with EMI shielding and EMI gaskets. For more information about customized shields and gaskets, you should give our team a call.
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• Does Your Electronic Device Need RFI or EMI Shielding?