EMI Shielding Coatings

EMI shielding coatings on plastic enclosures

EMI is any electrical signal that disturbs the function of a circuit, cable or other electronic component. EMI can originate from other equipment or from the affected component itself. The number of electromagnetic signals has increased with the ever growing use of computers, mobile phones and other electronic equipment. Due to this reason EMI shielding is acquiring great importance.

HHV utilizes the advanced method of vacuum sputtering to deposit EMI shielding. This process provides coatings of very high uniformity and batch-to-batch consistency. Typical thickness for functional thin-film EMI coatings is 2-3 microns and can be controlled within +/- 0.2 microns. This process is currently the most advanced application method commonly used for shielding.

 

Advantages:

The advantages of vacuum metalizing are greater than many of the other common shielding processes like nickel acrylic, zinc arc spraying or electroplating. Vacuum metalized EMI/RFI shielding costs less and is more environmentally friendly. 

Other advantages include:

• Outstanding Adhesion and Conductivity provides excellent EMI/RFI/ESD Shielding performance
• Thin metallic coatings do not alter part dimensions
• Precision masking provides consistent mask line control
• Uniform coverage on complex substrates
• Coatings can be applied to most plastics

 

Applications

 EMI shielding is used for a wide variety of products such as:

• Personal computer and mobile communication housings
• Medical equipment housings
• GPS devices
• Aerospace components
• Automotive components
• Analytical instruments
• Defense and military component housings