Electro Magnetic Control
The shielding of electro-magnetic waves is necessary to prevent the interference on electronic devices and thus their incorrect functioning. Refer to physics: Faraday Cage Effect.
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The Shielding effect is measured considering the attenuation (dB) of electro-magnetic waves (due to the reflection and absorption effect) inside and outside the shielding means.
The Shielding effect is connected with the electrical sheet resistance on the means. BM carries out reliable QC/QA Tests on all parts produced.
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Electro Magnetic Control – Shielding Technologies
Such control is performed through several electro-magnetic shielding technologies:
Conductive Paint Coating
Conductive Gaskets
Metal Shield / Net
Metal Surface Coating
Conductive Sheet Application (e.g. in-mould )
Conductive Silicone
Metal Surface Coating
Shielding Technology
-Coating Conductive Paint-
Silver
Silver-plated Copper
(Acheson Electrodag SP01)
Copper
(Acheson Electrodag 437)
(Morton Isolex R 73)
Nickel
Carbon |
Better Shielding Effect
(reduced resistance)
(reduced coating thickness) |
Coating Paint
Sheet Resistance
Copper
Acheson Electrodag 437 < 0,25 Ohm/sq at 50um
Silver-plated Copper (New)
Acheson Electrodag SP-010 < 0,075 Ohm/sq at 25um
Coating Paint
Attenuation ASTM ES 7-83
Copper
Acheson Electrodag 437 60-65 dB at 50um
Silver-plated Copper (New)
Acheson Electrodag SP-010 > 75 dB at 50um
EMC Shielding Innovative Technical Solution.
The collaboration between BM and suppliers (Acheson-ICI; SIVE) in studying new technical solution for EMC is leading to interesting results: technical / economic.
CASE HISTORY |
