US 10,504,544 B2Granted

Magnetic head and magnetic recording and reproducing device

AssigneeKabushiki Kaisha Toshiba

InventorsMichinaga Yamagishi, Tazumi Nagasawa

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Abstract

According to one embodiment, a magnetic head includes a reproducing portion. The reproducing portion includes first to fourth magnetic portions and a stacked body. The third magnetic portion is provided between the first and second magnetic portions. The fourth magnetic portion is provided between the first and second magnetic portions. A second direction from the third magnetic portion toward the fourth magnetic portion crosses a first direction from the first magnetic portion toward the second magnetic portion. The stacked body is provided between the first and second magnetic portions in the first direction and between the third and fourth magnetic portions in the second direction. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the second magnetic portion in the first direction, and an intermediate layer provided between the first and second magnetic layers in the first direction.

Claims11

Dependent claims

A magnetic head, comprising a reproducing portion,

the reproducing portion including:
a first magnetic portion;
a second magnetic portion;
a third magnetic portion provided between the first magnetic portion and the second magnetic portion;
a fourth magnetic portion provided between the first magnetic portion and the second magnetic portion, a second direction from the third magnetic portion toward the fourth magnetic portion crossing a first direction from the first magnetic portion toward the second magnetic portion;
a stacked body provided between the first magnetic portion and the second magnetic portion in the first direction and between the third magnetic portion and the fourth magnetic portion in the second direction;
an insulating portion provided between the fourth magnetic portion and the first magnetic portion;
and
another insulating portion provided between the fourth magnetic portion and the second magnetic portion,
the stacked body including:
a first magnetic layer;
a second magnetic layer provided between the first magnetic layer and the second magnetic portion in the first direction;
and
an intermediate layer provided between the first magnetic layer and the second magnetic layer in the first direction, the intermediate layer being nonmagnetic,
the third magnetic portion contacting the first magnetic portion,
the fourth magnetic portion contacting the second magnetic portion.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/119,395Filed 31 Aug 2018
Priority: JP 2018-0364871 Mar 2018
Published: US 2019/0272849 A15 Sep 2019
Granted: 10 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G11B 5/3903
Using magneto-resistive devices or effects: using magnetic thin film layers or their effects, the films being part of integrated structures
G11B 5/3945
Details related to the use of magnetic thin film layers or to their effects: heads comprising more than one sensitive element
G11B 5/35
Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only:…
H01F 10/3286
Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer:…

Family

US 2019/0272849 A1Pre-grant publication · published 5 Sep 2019
US 10,504,544 B2This patent

From the US filing history. Foreign family members aren’t listed.

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