公开(公告)号：US20240233763A9

公开(公告)日：2024-07-11

申请号：US18226026

申请日：2023-07-25

Applicant: Western Digital Technologies, Inc.

Inventor： Asif Bashir ,  Pierre-Olivier Jubert ,  Antony Ajan ,  Paul Christopher Dorsey

IPC: G11B5/73

CPC classification number: G11B5/7375 ,  G11B5/7369 ,  G11B2005/0021

Abstract: Various apparatuses, systems, methods, and media are disclosed for heat-assisted magnetic recording (HAMR) that, in some examples, provide a HAMR medium with two soft underlayers (SULs) on opposing sides of a single heatsink layer. For example, a magnetic recording medium is provided that includes a lower SUL on a substrate. The lower SUL is configured and positioned within the medium to provide a first return path for magnetic flux from a magnetic recording head during a write operation. The medium also includes a heatsink layer on the lower SUL and an upper SUL on the heatsink layer. The upper SUL is configured and positioned within the medium to provide a second return path for magnetic flux from the magnetic recording head. A magnetic recording layer is provided on the upper SUL to store information during the write operation. Additional layers or films may be provided as well.

公开(公告)号：US20240135969A1

公开(公告)日：2024-04-25

申请号：US18226026

申请日：2023-07-24

Applicant: Western Digital Technologies, Inc.

Inventor： Asif Bashir ,  Pierre-Olivier Jubert ,  Antony Ajan ,  Paul Christopher Dorsey

IPC: G11B5/73

CPC classification number: G11B5/7375 ,  G11B5/7369 ,  G11B2005/0021

Abstract: Various apparatuses, systems, methods, and media are disclosed for heat-assisted magnetic recording (HAMR) that, in some examples, provide a HAMR medium with two soft underlayers (SULs) on opposing sides of a single heatsink layer. For example, a magnetic recording medium is provided that includes a lower SUL on a substrate. The lower SUL is configured and positioned within the medium to provide a first return path for magnetic flux from a magnetic recording head during a write operation. The medium also includes a heatsink layer on the lower SUL and an upper SUL on the heatsink layer. The upper SUL is configured and positioned within the medium to provide a second return path for magnetic flux from the magnetic recording head. A magnetic recording layer is provided on the upper SUL to store information during the write operation. Additional layers or films may be provided as well.

公开(公告)号：US12087339B2

公开(公告)日：2024-09-10

申请号：US18226026

申请日：2023-07-25

Applicant: Western Digital Technologies, Inc.

Inventor： Asif Bashir ,  Pierre-Olivier Jubert ,  Antony Ajan ,  Paul Christopher Dorsey

IPC: G11B5/66 ,  G11B5/00 ,  G11B5/73 ,  G11B5/78

CPC classification number: G11B5/7375 ,  G11B5/7369 ,  G11B2005/0021

Abstract: Various apparatuses, systems, methods, and media are disclosed for heat-assisted magnetic recording (HAMR) that, in some examples, provide a HAMR medium with two soft underlayers (SULs) on opposing sides of a single heatsink layer. For example, a magnetic recording medium is provided that includes a lower SUL on a substrate. The lower SUL is configured and positioned within the medium to provide a first return path for magnetic flux from a magnetic recording head during a write operation. The medium also includes a heatsink layer on the lower SUL and an upper SUL on the heatsink layer. The upper SUL is configured and positioned within the medium to provide a second return path for magnetic flux from the magnetic recording head. A magnetic recording layer is provided on the upper SUL to store information during the write operation. Additional layers or films may be provided as well.