Radiator capable of considerably suppressing a high-frequency current flowing in an electric component

A radiator for use in radiating heat generated by an electronic component, said radiator having a principal surface facing said electronic component, said radiator comprising:

• a high-frequency current suppressor attached to said principal surface for attenuating a high-frequency current flowing through said radiator and having a frequency within a frequency band between several tens MHz and several GHz;
• and
• a heat-conductive sheet excellent in heat conductivity and formed on said high-frequency current suppressor.

A radiator for use in radiating heat generated by an electronic component, said radiator having a principal surface facing said electronic component, said radiator comprising:

• a high-frequency current suppressor attached to said principal surface for attenuating a high-frequency current flowing through said radiator and having a frequency within a frequency band between several tens MHz and several GHz;
• and
• an insulating sheet excellent in electrical insulation and formed on said high-frequency current suppressor.

A radiator for use in radiating heat generated by an electronic component, said radiator having a principal surface facing said electronic component, said radiator comprising a high-frequency current suppressor attached to said principal surface for attenuating a high-frequency current flowing through said radiator and having a frequency within a frequency band between several tens MHz and several GHz, said high-frequency current suppressor being made of a magnetic substance of a magnetic composition comprising M, X and Y, where M is a metallic magnetic material consisting of Fe, Co, and/or Ni, X being element or elements other than M and Y, and Y being F, N, and/or O, said M-X-Y magnetic composition having a concentration of M in the composition so that said M-X-Y magnetic composition has a saturation magnetization of 35-80% of that of the metallic bulk of magnetic material comprising M alone, said magnetic composition having the maximum value μ″max of an imaginary part μ″ of relative permeability in a frequency range of 0.1-10 gigahertz (GHz).