EMI Shielding

EMI Shielding Services Central Coating specializes in the custom application of EMI shielding materials using robotic and manual application methods.  EMI coatings provide EMI shielding, anti-static protection and surface grounding in various commercial and military applications. We are approved suppliers at many major Military, Industrial and Medical accounts, such as Raytheon Corp. for MIS 41252, BAE Systems, Zoll Medical, Benchmark Electronics, Bose Corporation, ITT Night Vision Systems and more.

The EMI coatings are intended for EMI shielding of non-conductive substrates. They provide excellent levels of EMI shielding effectiveness over a wide frequency range and excellent adhesion on a variety of plastics. Our EMI shielding services and coatings include the application of:

 

EMI SHIELDING TYPES

  • Nickel
  • Copper
  • Silver copper
  • Pure Silver
  • Plural Component
SUPPLIERS

  • Acheson
  • Chomerics
  • Lord Corporation
  • Creative Materials
  • Spraylat
  • Randolph
  • Plus Many More!

EMI Shielding For higher production requirements, custom mask tooling is constructed. This tooling eliminates hand masking, reduces part cost and provides a high level of part-to-part repeatability. We will match your requirements with the appropriate EMI shielding coating.Your parts are inspected and tested to our rigorous internal standards.  If your product requires custom testing plans for EMI shielding or methods, we will incorporate your requirements into our quality system. Call Central Coating for all of your EMI shielding services requirements.

ABOUT EMI SHIELDING

EMI Shielding Coatings & Conductive Form in place gaskets are materials designed to contain, shield or control an Electronic Field in order to prevent undesired responses or degradation of performance in electrical or electronic equipment. EMI Shielding Coatings are used by the medical, military, telecommunications automotive, consumer goods and instrumentation markets and industries. Whether you are shielding the interior of an electronic enclosure or components with in the electronic enclosure, Central Coating has the expertise and experience to provide the appropriate and most cost effective solution to your EMI Shielding problem.

Depending on your application and EMI Shielding requirements, Central Coating offers a wide selection of EMI Coatings which we  stock.  These coatings include Silver Plated Copper, Nickel and pure Silver materials. We also apply a wide variety of Conductive Form-in-place gasket materials if your application requires gasket sealing solutions.  Many of these materials’ technical data sheets can be found in the Technical Section of our web-site.

When shielding a system, design engineers should consider incorporating a Faraday Cage design approach from the onset of the design.  This approach will provide enclosure shielding encapsulating the electronics. Additional shielding can be added to those areas which are EMI “Noise” generating. When utilizing a plastic enclosure, conductive EMI shielding paints in combination with form-in-place conductive gasket application have proven to be great shielding approaches which simulate Faraday cages. The EMI Shielding Coating would be applied robotically to the interior of the plastic enclosure and the EMI Form-in-Place (FIP) conductive gasket would provide the connection and complete the seal. Central Coating can help you choice the appropriate EMI Shielding Coating as well as EMI Shielding Gasket material for your application.

 

With over 35 years of experience, Central Coating has a solid history of proving our customers with quality, cost effective and reliable EMI Shielding coating solutions. We remain in the forefront of technological advances in precision coating application for a growing technological community. We have over 35,000 square feet of manufacturing space, 5 Robot Coating Cells and 3 six axis robots applying EMI Shielding Coating 1 part to thousands of parts. Central Coating can meet all of your EMI Shielding coating application needs. Please browse our site for other services including water transfer printing.

 

What’s New for EMI Shielding Applications at Central Coating

Central Coating is now using two new material for emi shielding applications:

The first compound  is  ideal for use on electronic enclosures and assemblies where abrasion resistance and coating durability are important. This durable, conductive coating derives its hardness from its nickel composition and may provide limited amounts of H-field shielding. Given its relatively low conductivity as compared to other metal fillers, the nickel provides exceptional shielding for enclosures where both external RF fields must be excluded, and internal radiated emission must be attenuated.

It is an electrically conductive, one-component nickel-filled acrylic coating that is specially formulated for application on plastics to provide modest EMI shielding. The benefits include:

  • Good EMI shielding performance at standard thickness and application
  •  Good adhesion to a variety of substrates
  •  One component, ready to use with simple mixing
  •  Good environmental and abrasion resistance
  •  Good leveling. Wets and covers surfaces smoothly.
  •  Easy to apply with standard spray paint equipment
  •  Standard dry-times for efficient, costeffective application
  •  Good electrical conductivity and cost effective addition to electronic enclosures and assemblies

 

This conductive coating is ideal for a variety of applications, including:
• Moderate EMI shielding
• Anti-static protection
• Surface grounding
• Coating of ABS, PC/ABS, and many other types
of plastic enclosures

 

The second material we are working with is an electrically screen-printable, electrically conductive, epoxy based ink and coating suitable for application by screen- printing, dipping and syringe dispensing. This product features excellent adhesion to Kapton, Mylar, glass and a variety of other surfaces. Unlike conventional conductive materials, this product is very resistant to flexing and creasing. Some applications for this include printed potentiometers, printed resistors, emi/rfi shielding of polyimide flexible circuits, polymer thick film circuitry, membrane switches and anode coatings for tantalum capacitors.

 

Engineer’s Guide to Paint Masking Details

There are four important questions to be answered in the application of liquid coatings (including decorative coatings and textures, ESD Coatings, and EMI/RFI coatings):

 

  1. Where is the coating required?
  2. Where is the coating absolutely NOT allowed?
  3. What is the tolerance between the two areas noted above?
  4. What are the production volumes?

 

These answers are critical in designing effective masking for success.  Central Coating has multiple options, and years of experience, to help guide you to a positive outcome with your product. These few details will help in your decision-making process:

 

  1. Masking exactly to an inside or outside corner is difficult; allow for a margin of .015” – .060”    depending on geometry;
  2. Through holes can be plugged, blown through, or masked with a margin. A mask around through holes should allow for .030” – .060” larger than the hole diameter;
  3. Bosses generally are capped, .030” – .060” down from the top surface, alternatively or selectively we can mask threads and coat the top of the boss;
  4. Narrow flanges, perimeters or ribs should be at least .050” wide, and not subject to bowing or flexing; we typically require half of the detail thickness for effective masking; min. .030”;
  5. In general, flexible, thin wall parts with delicate features should be reviewed with our engineers for feasibility;
  6. Deep, narrow spaces are difficult to fully coat with accuracy and even film builds.

 

Each part is unique, and may require a combination of solutions.  Prototype and Low Volume projects have differing masking solutions.  Masking that is effective at the initiation of a project may prove inadequate as volumes increase.

 

Whether simple masking tape, plotter cut masks, die cut adhesives, standard and/or custom RTV plugs, plastic caps, machined lay-on fixtures or rugged electroformed hard tools, we always have a cost- effective solution.

 

We welcome involvement as early in the design process as possible, but can respond effectively at any point in your product design cycle.

 

 

 


UL® Recognized, QMRX2, File: E107883(M)

EMI Shielding and EMI Shielding Services are provided in  Massachusetts (MA), Maine (ME), Vermont (VT), Connecticut (CT), Rhode Island (RI), New Hampshire (NH), New York (NY), New Jersey (NJ), Pennsylvania (PA) and the entire east and west coast.

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