Absorption enhanced media for energy assisted magnetic recording
AssigneeWestern Digital (Fremont), LLC
InventorsHongXing Yuan, Shing Lee, Zhong Shi, Jinshan Li
Life of this patent
Estimating the term…
Abstract
A magnetic recording media is disclosed. The media comprises a substrate, a recording layer disposed over the substrate, and a metallic layer disposed between the recording layer and the substrate. The recording layer is configured to receive an electromagnetic radiation, absorb a first portion of the electromagnetic radiation, and transmit a second portion of the electromagnetic radiation. The metallic layer comprises a non-magnetic metal and configured to reflect at least some of the second portion of the electromagnetic radiation towards the recording layer.
Claims14
A magnetic recording media, comprising:
- a substrate;
- a recording layer disposed over the substrate and configured to:
- receive an electromagnetic radiation,
- absorb a first portion of the electromagnetic radiation, and
- transmit a second portion of the electromagnetic radiation;
- and
- a metallic layer disposed between the recording layer and the substrate, the metallic layer comprising a non-magnetic metal and configured to reflect at least some of the second portion of the electromagnetic radiation towards the recording layer,
- wherein a third portion of the reflected electromagnetic radiation is absorbed by a region of the recording layer.
A magnetic recording media, comprising:
- a substrate;
- a recording layer disposed over the substrate and configured to:
- receive an electromagnetic radiation,
- absorb a first portion of the electromagnetic radiation, and
- transmit a second portion of the electromagnetic radiation;
- and
- a metallic layer disposed between the recording layer and the substrate, the metallic layer comprising a non-magnetic metal and configured to reflect at least some of the second portion of the electromagnetic radiation towards the recording layer,
- wherein the electromagnetic radiation comprises electromagnetic energy from a near field transducer (NFT) of an energy assisted magnetic recording (EAMR) head disposed over the media,
- wherein the electromagnetic energy has a power in the range between about 0.1 to 0.5 mW and a wavelength in the range between about 600 to 1000 nm.
Dependencies are inferred from the claim text.