To think about

Choice of gaskets – what you must think about

• Create space for mounting the gasket
• How should it be mounted? (PDF)
• How often will the lid/door be open?
• Material in the application, material thickness.
  Think about bi-metallic corrosion (PDF).
• Shielding performance
• Cost aspects – Volume production? Small series?
  Storage time? Tooling costs?
• Fulfillment of standards
• Environmental requirements, IP Ratings

Hints:

• Have early thoughts about how your product must be shielded. Very often is it late and that creates problems and also more expensive.
• A gasket should be compressed about 15-30 %.
• Use mechanical compression stops.
• Tolerances are different in hard materials comparing with soft.
• Ask for help from your supplier. Why not Jolex AB?
• Ask your supplier for samples. Why not Jolex AB?

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Choice of optical filters – RFI windows

• There are different types of windows.
• Plastic or glass (PDF)
• Comparison between different optical materials (PDF)
• Stainless steel mesh or copper mesh. Blackened or not blackened.
• Thicknesses of wires and number of openings.
• Conductive film instead of using mesh.
• Possibility to use anti-scratch surface.
• Possibility to use anti-glare surface.

Hints:

• Watch out for Moiré affects when using the RFI window in a LCD application.