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Electromagnetic interference (EMI) is an ever-present concern with high-performing electronic and wireless devices, and as these devices become smaller, faster, more powerful and more sensitive, the potential impacts from EMI increase. Manufacturers must take great care to choose the right EMI shielding components to protect all kinds of devices from the potential consequences of EMI.
What is Electromagnetic Interference Shielding?
Caused by electromagnetic fields from a variety of natural and manmade sources, EMI shielding meaning is unwanted noise or interference in an electrical circuit that can degrade or even halt system performance and introduce safety concerns. While the downgraded performance may just be an annoyance for consumers with handheld electronics or household entertainment devices, the consequences can be dire in other applications, such as medical devices, heavy machinery or military equipment.
One challenge with EMI is that the very things that cause electric motors and parts to work – electromagnetic waves consisting of an electric field and a magnetic field – also work together to create EMI. When these fields operate at the same frequency, they disrupt each other and cause EMI, and when this issue is found in the radio frequency spectrum, EMI is called radio-frequency interference (RFI).
What is an EMI Shield?
While the phenomenon of EMI is unavoidable, the good news is its potential impacts can be mitigated with high-performing, reliable shielding products.
Parker Chomerics is the global leader in EMI shielding, with an EMI shielding product family that spans a wide variety of uses and applications. It encompasses an extensive selection of EMI gaskets, shielded windows, shielded honeycomb air vents, cable shielding products, grounding solutions, shielding laminates, and metal foil tapes. It also includes conductive adhesives, coatings, sealants, greases and inks, as well as conductive plastics.
EMI Shielding Gaskets
Parker Chomerics designs and manufactures EMI shielding gaskets that prevent electromagnetic waves from entering or exiting an electronic enclosure. These gaskets span a wide range of materials and options, from electrically conductive elastomers to robotically dispensed form-in-place materials, fabric-over-foam and traditional metal-based gasketing.
EMI Shielding Paints
Electrically conductive paints and coatings deliver critical EMI shielding on plastic and composite housings of crucial products such as electronic assemblies as well as aircraft and airframe components. Customers can choose from a variety of electrically conductive filler and binder configurations, each designed for durable, reliable and high-performing EMI shielding in various applications.
EMI Shielding Engineered Laminates
Our family of engineered laminates for EMI shielding and grounding consists of foil and film dielectrics adhesively joined for a custom laminate solution. The electrically conductive portion includes: aluminum, copper, or tin-plated copper foil; nickel-plated copper, polyester taffeta; nickel-plated silver, nylon taffeta; and nickel-plated silver, nylon rip-stop.
EMI Shielding Air Ventilation Panels
Parker Chomerics EMI shielding air ventilation panels include a range of innovative products and configurations to deliver high-performance shielding. Our shielded EMI air ventilation panels combine maximum shielding with minimal air flow resistance to provide optimal airflow for cooling electronic enclosures. These vents can be incorporated into enclosures where EMI radiation and susceptibility is a concern or where heat dissipation is necessary to ensure long-term assembly performance.
Conductive Plastic Pellets
The Parker Chomerics family of materials are electrically conductive thermoplastics for plastic enclosure EMI shielding solutions. The polymer alloys (PC-ABS or PBT-PC) and conductive fillers are engineered for stable electrical, mechanical, and physical performance.
Learn more about high-performing EMI shielding solutions.
How to Design for Electrically Conductive Paints and Coatings
Discover the design considerations you must understand when considering using an electrically conductive paint or coating on your electronics assembly. Our experts break down your options, things to consider, and what to watch out for in this informative video on how to design with Parker Chomerics coatings and paints.
Thermal Interface Materials & EMI Shielding Solutions
With more than 60 years of experience, we have the technical know-how to meet the rapidly increasing needs of engineers.
