Patent ID: 6653573
Filing Date: 2003-11-25
Classification: H05K

Abstract:
A wiring board comprising:an insulate base material; a conductor pattern formed thereon; and a magnetic thin film formed on said conductor pattern, said magnetic thin film being made of a magnetic loss material having a maximum value of &mgr;â€³max of loss factor &mgr;â€³ that is the imaginary component in the complex permeability characteristic of said magnetic loss material, said maximum value &mgr;â€³max existing within a frequency range of 100 MHz to 10 GHz, said magnetic loss material being a composition represented by Mâ€”Xâ€”Y, wherein M is at least one of Fe, Co, and Ni, X is at least one element other than M or Y, and Y is at least one of F, N, and O, and having a relative bandwidth bwr that is not greater than 200% where the relative bandwidth bwr is obtained by extracting a frequency bandwidth between two frequencies at which the value of &mgr;â€³ is 50% of the maximum &mgr;â€³max and normalizing the frequency bandwidth at the center frequency thereof.