EMI Shielding Fundamentals
JEMIC manufactures a variety of electronic shielding products. These types of products control and contain electromagnetic interference, otherwise know as EMI. EMI is an inadvertent, undesired electronic signal, or signals, radiating from an electronic device. These emissions may manifest themselves as harmless, annoying static on your radio, or possibly as a much more serious interference, such as with an aircraft or in military equipment. Typically most electronics are enclosed in a metal housing, such as computers, where the metal housing acts as the primary shield. However, even the smallest seam or opening in the enclosure may allow for the escape of EMI. That's where our products come in. Our products fill the gaps and holes in electronic enclosures essentially making the enclosure a complete, seamless shield, thereby containing the EMI.
One of our first product lines, that continues to remain a significant focus of our productions, is our "fabric-over-foam" product line. Fabric-over-foam EMI gaskets consist of an electrically conductive fabric wrapped around and bonded to a foam core. These types of EMI gaskets are available as both continuous profile gaskets and I/O backplane gaskets. The foam is resilient and compensates for tolerances and variations within the seams and opening of the enclosure. The electrically conductive fabric is, of course, the EMI shielding. The fabric is modified to be electrically conductive throughout a metal plating process. Commonly plated with copper, silver and nickel, or combinations thereof, the fabric is highly conductive and remains flexible.
In addition to our EMI Profile Gaskets and I/O backplane gaskets, JEMIC Shielding Technology offers EMI shielding tapes, EMI cable shielding and EMI shielding laminates. We also have extensive in-house capabilities in the areas of assembly and value-added capabilities.
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