An electromagnetic wave absorber for use in the high frequency range above 1
Ghz
and a composite member are characterized by the fact that magnetic metal grains
are covered with ceramic above 20 volume %. Further, a method of manufacturing
the electromagnetic absorber and the composite member is characterized by the fact
that composite magnetic particles, in which a plurality of magnetic metal grains
and ceramic are unified, are formed through a mechanical alloying method applied
to a composite powder composed of magnetic metal powder and ceramic powder. The
electromagnetic wave absorber can be used in a semiconductor device, an optical
sending module, an optical receiving module, an optical sending and receiving module,
an automatic tollgate in which erroneous operation due to electromagnetic wave
disturbance is provided by use of the electromagnetic wave absorber.
