Conductive coatings have been successfully used for many years on applications from mobile phones to gas meters. The coatings lend themselves to demanding design requirements and are often a quick and inexpensive solution to an EC conformance problem.
It is important when deciding upon a suitable coating to know the attenuation that the product is susceptible to. Silver coatings, when correctly applied, work by reflecting signals whereas nickel coatings will tend to absorb signals. The effectiveness of a conductive coating is dependent upon its electrical impedance and conductivity. Plastics are generally non-conductive and are transparent to electromagnetic waves and therefore are not suitable for EMI shielding purposes.
The shielding performance of different coating materials can easily be compared but various factors affect the degree of shielding each coating will give on any particular application. Flat test pieces can be used to give comparative performances between different coating types but they are not representative of fully assembled enclosures with differing degrees of geometric complexity. The level of EMI shielding therefore becomes part-specific.
The Anotec Ag and Cn series of coatings provides a complete range of Electro Magnetic Compatible EMI shielding for all requirements. They are air drying systems which can be easily applied and are compatible with plastics commonly used for all sizes of electronic enclosures.
The Ag and Cn series of coatings will coat vertical and horizontal surfaces, giving excellent adhesion to substrates such as Polycarbonate, ABS, Polystyrene and ABS/PC blends.
Due to the potential differences of coating suitability and application it is always best to speak with one of the application engineers at Anochrome to ensure the correct product is specified.
Parts can be processed using automatic CNC programed robotic equipment, this may require initial investment in bespoke tooling.
Parts processed with manual input, generally means reduced capital outlay on bespoke tooling.