Patent ID: 6985336

Claim:
A magnetic recording-reproducing apparatus to record and reproduce a signal using magnetic tape, comprising: a chassis; a rotating drum which is made of conductive material and connected to a chassis through a spring, the chassis being a ground potential portion of the magnetic recording-reproducing apparatus, wherein the magnetic tape is helically wound around an external surface of the rotating drum; which is made of conductive material and connected to a chassis through a spring, the chassis being a ground potential portion of the magnetic recording-reproducing apparatus, wherein the magnetic tape is helically wound around an external surface of the rotating drum; a base metal which is fixed inside the rotating drum and is electrically connected to the rotating drum; and a magnetic head section fixed to the base metal, wherein a magnetoresistive effect element to read a recording signal in contact with the magnetic tape is used for a head element section comprising first and second insulating films provided between a pair of magnetic shielding films; the head element section is structured to be provided between a head substrate and a protective substrate electrically connected to the base metal via third and fourth insulating films; and at least one of the head substrate and the protective substrate are formed of a material comprising one of an NiZn ferrite and an MnZn ferrite with an electrical resistivity of 10 2 to 10 7 Ωcm and a Curie temperature of lower than −10° C.