By Liz White, UT editor
Austin, Texas-Electronic devices such as mobile phones, computers, notebooks, digital cameras may soon be benefiting from electromagnetic shielding which relies on polyurethane filled with flaked metal.
A new EMI (electromagnetic interference) absorber from 3M is recommended for attenuation where electromagnetic-absorbing properties are needed. 3M says its new absorber suppresses radiated noise from devices in the broadband radio frequency range.
As well as reducing specific absorption rates in mobile phones, designed to address health concerns over radiation from these devices, the new material is aimed at use in televisions with screens using LCD/PDP (liquid crystal display/plasma display panels) and in printed circuit boards for communications.
The new material-EMI absorber AB-5000 series-is different from other absorbers, says 3M, in that it is "made with a flexible polyurethane resin loaded with a soft metal-flake filler."
It has an acrylic, pressure-sensitive adhesive and is protected by a removable liner. The typical attenuation range of absorbers in this series depends on thickness, with the current material being offered in thicknesses of 0.1, 0.2, 0.3, 0.5 and 1.0 mm. "