Patent ID: 11881234
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 18:
19. A magnetic head, comprising:
a first magnetic pole;
a second magnetic pole; and
a stacked body provided between the first magnetic pole and the second magnetic pole,
the stacked body including
a first magnetic layer,
a second magnetic layer provided between the second magnetic pole and the first magnetic layer,
a third magnetic layer provided between the second magnetic pole and the second magnetic layer,
a fourth magnetic layer provided between the second magnetic pole and the third magnetic layer,
a first non-magnetic layer provided between the first magnetic layer and the first magnetic pole,
a second non-magnetic layer provided between the second magnetic layer and the first magnetic layer,
a third non-magnetic layer provided between the third magnetic layer and the second magnetic layer,
a fourth non-magnetic layer provided between the fourth magnetic layer and the third magnetic layer,
a fifth non-magnetic layer provided between the second magnetic pole and the fourth magnetic layer,

the second non-magnetic layer being in contact with the second magnetic layer and the first magnetic layer,
the third non-magnetic layer being in contact with the third magnetic layer and the second magnetic layer,
the fourth non-magnetic layer being in contact with the fourth magnetic layer and the third magnetic laver,
a fourth thickness of the fourth magnetic layer along a first direction from the first magnetic pole to the second magnetic pole being not less than 0.5 times and not more than 1.6 times a first thickness of the first magnetic layer along the first direction,
a second thickness of the second magnetic layer along the first direction being less than the first thickness, and
the second thickness being not more than 0.6 times the fourth thickness.