EMI absorbing material
3M Electronics
For the absorbers with "HF" in the product name, "halogen free" or "low halogen" is defined as having less than 900 ppm bromine, less than 900 ppm chlorine and less than 1500 ppm total bromine and chlorine; other halogens are excluded from this definition. These are the levels set forth in certain industry standards, such as the International Electrotechnical Commission (IEC) 61249-2-21 Standard.
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