Patent ID: 6803130
Filing Date: 2004-10-12
Classification: H01F,Y10T

Abstract:
A composite magnetic material, comprising a ferrite powder and a resin, wherein said ferrite is a spinel type ferrite having a composition represented by(NiO)x(CoO)y(MeO)z(Fe2O3)1âˆ’xâˆ’yâˆ’z whereinMe is at least one selected from the group consisting of Mg, Cu and Zn, 0.10&lE;x&lE;0.550; 0.050&lE;y&lE;0.200; 0&lE;z&lE;0.200; and 0.400&lE;(x+y+z)&lE;0.600, and wherein the ferrite powder has a particle size which permits each of the ferrite particles to remain a single domain particle, and wherein the composite magnetic material possesses a real number part &mgr;â€² of the complex permeability of at least 1.5 and a gain Q value of at least 80 when measured at a frequency of 2 GHz by the S-parameter method.