Magnetic reproducing head having a structure to inhibit electrostatic discharge damage to a recording tape

A head drum apparatus to write or read a signal on or from magnetic tape, comprising:

• a rotating drum having conductivity to be a ground potential, 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 102 to 107 Ωcm and a Curie temperature of lower than −10° C.

A magnetic recording-reproducing apparatus to record and reproduce a signal using magnetic tape, comprising:

• a rotating drum having conductivity to be a ground potential, 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 102 to 107 Ωcm and a Curie temperature of lower than −10° C.