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Originally Published EMDM March/April 2002

PRODUCT UPDATE

Laird Technologies Bavaria GmbH

Conductive foam that provides x-, y-, and z-axis conductivity enhances EMI shielding effectiveness and grounding in connector shields and I/O gaskets. The UL 94HB–rated shields developed at the US headquarters of Laird Technologies Bavaria GmbH (Rosenheim, Germany) combine the conductivity of metal gaskets with the low compression characteristics of fabric-over-foam gaskets.

Shielding effectiveness attains more than 90 dB across a range of frequencies, and compression varies from 10 to 50% of the original uncompressed 1.5- or 3.2-mm thickness. A nickel and copper–plated polyester mesh surface provides abrasion resistance for up to 1 million cycles. In addition to standard configurations, the foam is available as sheet stock in and custom die-cut shapes.

The company also has developed a process for the production of conductive film inserts for plastic enclosures that reportedly is more cost-effective and environmentally sound than plating, vacuum metallization, or painting. These inserts provide shielding effectiveness of 60 dB, up to 18 GHz. Consisting of a silver-plated fibre layer bonded to a polymer substrate, the inserts are engineered and thermoformed into shapes that conform to the intricate details of plastic enclosures.

Copyright ©2002 European Medical Device Manufacturer