A magnetic powder 4 is produced by use of a plating mold M which is
pattern-formed with an electrode range 10 corresponding to the shape of a
magnetic powder 4 and an insulative range surrounding the periphery of the
electrode range, precipitating films 40 of the magnetic material
selectively in the electrode range through an electroplating and then
peeling the films 40 from the plating mold. The flat magnetic powders 4
where are regular in piano shapes and diameters among or between powders
or where average crystal grain diameters are 100 nm or smaller, are much
dispersed into an insulative resin as a bonding agent.
