Patent ID: 11869540
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 19:
20. A magnetic head, comprising:
a first magnetic pole;
a second magnetic pole;
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 first magnetic layer and the second magnetic pole,
a third magnetic layer provided between the second magnetic layer and the second magnetic pole,
a fourth magnetic layer provided between the third magnetic layer and the second magnetic pole,
a first nonmagnetic layer provided between the first magnetic pole and the first magnetic layer,
a second nonmagnetic layer provided between the first magnetic layer and the second magnetic layer and being in contact with the first magnetic layer and the second magnetic layer,
a third nonmagnetic layer provided between the second magnetic layer and the third magnetic layer,
a fourth nonmagnetic layer provided between the third magnetic layer and the fourth magnetic layer and being in contact with the third magnetic layer and the fourth magnetic layer, and
a fifth nonmagnetic layer provided between the fourth magnetic layer and the second magnetic pole;

a first terminal electrically connected to the first magnetic pole;
a second terminal electrically connected to the second magnetic pole; and
a third terminal electrically connected to the third nonmagnetic layer,
wherein
a first thickness of the first magnetic layer along a first direction from the first magnetic layer to the fourth magnetic layer is thicker than a second thickness of the second magnetic layer along the first direction, and thicker than a third thickness of the third magnetic layer along the first direction, and
a fourth thickness of the fourth magnetic layer along the first direction is thicker than the second thickness and thicker than the third thickness.