Patent ID: 7397414
Filing Date: 2008-07-08
Classification: H05K

Abstract:
1. A composite body for absorbing an electromagnetic wave including a thermoplastic resin consisting of at least one of polypropylene and methylpentene polymer blended with 30-58% by volume of soft magnetic material powder having a scale-like shape and an aspect ratio of 3-20 and a mean particle diameter converted to spherical diameter of 5-50 μm, comprising a unit cell having a bore extending from a top face to a bottom face, wherein a portion of said bore located on a side of said bottom face has a smaller cross-sectional area than that of said bore at said top face, and a height of said unit cell from the bottom face to said top face is at least 1.2 times and at most 10 times as large as the maximum width of said bore at the top face of said unit cell.