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US 11,636,874 B1Granted
Magnetic recording head having a magnetic pole and a write shield
AssigneeTDK Corporation
InventorZhenyao Tang
Life of this patent
Estimating the term…
Abstract
This magnetic recording head includes a main magnetic pole, a write shield, and an oscillation element. The oscillation element has a first oscillation portion, a second oscillation portion, and a non-magnetic conductive layer provided therebetween. The oscillation element has a first current path connecting the main magnetic pole and the non-magnetic conductive layer to each other, and a second current path connecting the write shield and the non-magnetic conductive layer to each other.
Claims17
A magnetic recording head comprising:
- a main magnetic pole that extends toward an air bearing surface and generates a recording magnetic field;
- a write shield disposed on a lateral side of the main magnetic pole when viewed from the air bearing surface;
- a side shield disposed on a lateral side of the main magnetic pole when viewed from the air bearing surface;
- an insulation layer disposed between the side shield and the main magnetic pole, and between the side shield and the write shield;
- and
- an element disposed in a gap between the main magnetic pole and the write shield, the element having:
- a first portion including:
- a first ferromagnetic layer;
- and
- a first non-magnetic layer disposed between the first ferromagnetic layer and the main magnetic pole;
- a second portion including:
- a second ferromagnetic layer;
- and
- a second non-magnetic layer disposed between the second ferromagnetic layer and the write shield;
- a non-magnetic conductive layer disposed between the first portion and the second portion, the non-magnetic conductive layer being electrically connected to the side shield;
- a first current path connecting the main magnetic pole and the non-magnetic conductive layer to each other;
- and
- a second current path connecting the write shield and the non-magnetic conductive layer to each other,
- wherein the first portion is disposed between the main magnetic pole and the non-magnetic conductive layer, and
- the second portion is disposed between the write shield and the non-magnetic conductive layer.
17 more elements
A magnetic recording head comprising:
- a main magnetic pole that extends toward an air bearing surface and generates a recording magnetic field;
- a write shield disposed on a lateral side of the main magnetic pole when viewed from the air bearing surface;
- and
- an element disposed in a gap between the main magnetic pole and the write shield, the element having:
- a first portion including:
- a first ferromagnetic layer;
- and
- a first non-magnetic layer disposed between the first ferromagnetic layer and the main magnetic pole;
- a second portion including:
- a second ferromagnetic layer;
- and
- a second non-magnetic layer disposed between the second ferromagnetic layer and the write shield;
- a non-magnetic conductive layer disposed between the first portion and the second portion;
- a first current path connecting the main magnetic pole and the non-magnetic conductive layer to each other;
- and
- a second current path connecting the write shield and the non-magnetic conductive layer to each other,
- wherein the first portion is disposed between the main magnetic pole and the non-magnetic conductive layer,
- the second portion is disposed between the write shield and the non-magnetic conductive layer, and
- a width of the non-magnetic conductive layer in a direction orthogonal to a first direction perpendicular to the air bearing surface and a gap direction toward the write shield from the main magnetic pole when viewed from the air bearing surface to the first direction is larger than that of the first portion and that of the second portion.
16 more elements
Dependencies are inferred from the claim text.