US 11,881,237 B1 · Cross track current design for energy assisted magnetic recording

Abstract

The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a current flow in a cross-track direction around a main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the main pole and the trailing shield. A hot seed layer is disposed between the trailing gap and the trailing shield. A first insulation layer is disposed between the hot seed layer and the trailing shield, where the first insulation layer contacts the side shields. A second insulation layer is disposed between the main pole and leading shield, where the second insulation layer contacts the side shields. The first and second insulation layers direct the current through the side shields and across the main pole in a cross-track direction.

Claims20

Dependent claims

A magnetic recording head, comprising:

a main pole;
a trailing gap disposed over a first surface of the main pole;
a hot seed layer disposed over the trailing gap, the trailing gap being disposed between the first surface of the main pole and the hot seed layer at a media facing surface, wherein the hot seed layer has a first length in a cross-track direction at the media facing surface;
a first side shield disposed adjacent to a second surface of the main pole;
a second side shield disposed adjacent to a third surface of the main pole;
a first insulation layer disposed over the hot seed layer, wherein the first insulation layer has a second length greater than or equal to the first length of the hot seed layer in the cross-track direction at the media facing surface;
a trailing shield disposed over the first insulation layer;
a second insulation layer disposed adjacent to the first side shield and the second side shield;
and
a leading shield disposed adjacent to the second insulation layer.

7 more elements

A magnetic recording head, comprising:

a main pole;
a blocker layer disposed in contact with a first surface of the main pole at a media facing surface;
a first side shield disposed adjacent to a second surface of the main pole;
a second side shield disposed adjacent to a third surface of the main pole;
a hot seed layer disposed over the blocker layer, the first side shield, and the second side shield at the media facing surface, wherein the hot seed layer comprises:
a first overhang portion extending in a cross-track direction over the first side shield;
and
a second overhang portion extending in the cross-track direction over the second side shield;
a first insulation layer disposed at the media facing surface, the first insulation layer comprising:
a first portion disposed adjacent to the first overhang portion;
and
a second portion disposed adjacent to the second overhang portion;
a trailing shield disposed over the hot seed layer and the first insulation layer;
a second insulation layer disposed adjacent to the first side shield and the second side shield, wherein the second insulation layer has a greater length than the first insulation layer;
and
a leading shield disposed adjacent to the second insulation layer.

13 more elements

Dependencies are inferred from the claim text.

Cross track current design for energy assisted magnetic recording

Life of this patent

Cross track current design for energy assisted magnetic recording

Life of this patent

Abstract

Claims20