CPC H05K 9/0081 (2013.01) [C09K 5/14 (2013.01); H05K 9/0083 (2013.01)] | 31 Claims |
1. A thermally-conductive electromagnetic interference (EMI) absorber comprising a matrix loaded with thermally-conductive particles, EMI absorbing particles, and silicon carbide, wherein the silicon carbide is present in a predetermined amount sufficient to synergistically enhance both thermal conductivity and EMI absorption, wherein the EMI absorbing particles comprise carbonyl iron, and the thermally-conductive particles comprise alumina;
wherein:
the thermally-conductive EMI absorber includes at least about 6 volume percent of the alumina, at least about 8 volume percent of the carbonyl iron, and at least about 21 volume percent of the silicon carbide; or
the thermally-conductive EMI absorber includes about 2 to 4 volume percent of magnetic flakes, about 3 to 5 volume percent of the carbonyl iron, about 18 to 23 volume percent of the alumina, about 27 to 40 volume percent of manganese zinc ferrite, and about 4 to 10 volume percent of the silicon carbide.
|