US 12,688,873 B1 · Heat-assisted magnetic recording heads with additional magnetic material

Abstract

Described are magnetic write heads for heat-assisted magnetic recording (HAMR) in which either or both of the heat sink disk or middle disk of the near field transducer are composed of magnetic materials. In addition, any diffusion barrier layers provided between the write pole and the heat sink or other components may include magnetic materials. Constructing write heads that include magnetic material containing components between the write pole and the near field transducer may result in increased areal density capability (ADC) due to lowering the magnetic field angle, decreasing the magnetic field rise time, and/or increasing the magnetic field strength.

Claims20

Dependent claims

A write head for recording on magnetic media positioned proximate to a media facing surface of the write head, the write head comprising:

a write pole extending proximate to the media facing surface;
a near field transducer disposed adjacent to the write pole, the near field transducer comprising an emitter disk disposed between a middle disk and a sunken disk, a peg extending from the emitter disk toward the media facing surface, and a waveguide configured to deliver electromagnetic radiation to the sunken disk for coupling into the emitter disk;
and
a heat sink disposed between the middle disk and the write pole,
wherein one or both of the heat sink and the middle disk is composed of a magnetic material.

2 more elements

Dependencies are inferred from the claim text.

Heat-assisted magnetic recording heads with additional magnetic material

Life of this patent

Heat-assisted magnetic recording heads with additional magnetic material

Life of this patent

Abstract

Claims20