公开(公告)号：US20190392862A1

公开(公告)日：2019-12-26

申请号：US16524544

申请日：2019-07-29

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Lihong Zhang ,  PengBoon Khoo

IPC: G11B5/596 ,  G11B20/10

Abstract: A magnetic recording medium includes a recording surface comprising a first recording layer having a first ferromagnetic resonant frequency and a second recording layer having a second ferromagnetic resonant frequency. The first recording layer is configured for storing user data and the second recording layer configured for storing servo data. A recording head arrangement is configured for microwave-assisted magnetic recording (MAMR) and writing user data to the first recording layer. The recording head arrangement comprises a write pole configured to generate a write magnetic field, and a write-assist arrangement proximate the write pole. The write-assist arrangement is configured to generate a radiofrequency assist magnetic field at a frequency that corresponds to the first ferromagnetic resonant frequency. A reader of the recording head arrangement is configured to read combined signals from the first and second recording layers.

公开(公告)号：US11352528B1

公开(公告)日：2022-06-07

申请号：US16299604

申请日：2019-03-12

Applicant: Seagate Technology LLC

Inventor： PengBoon Khoo ,  Li Hong Zhang ,  Swee Chuan Gan ,  Xiong Liu

IPC: C09J9/02 ,  C09J11/04 ,  C09J133/08 ,  C09J133/10 ,  C09J163/00 ,  G11B33/02 ,  C09J183/04 ,  C08K3/04 ,  C09J7/22 ,  C09J7/40 ,  G11B7/24024

Abstract: Described are adhesive compositions that contain adhesive polymer and carbon nanotubes; devices (e.g., electronic devices and electronic device enclosures) and compositions that include one of these adhesive compositions; and uses of such adhesive compositions as part of an electronic device.

公开(公告)号：US10482912B1

公开(公告)日：2019-11-19

申请号：US16249438

申请日：2019-01-16

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Lihong Zhang ,  PengBoon Khoo

IPC: G11B5/09 ,  G11B5/596 ,  G11B20/10 ,  G11B5/00

Abstract: A magnetic recording medium includes a recording surface comprising a first recording layer having a first ferromagnetic resonant frequency and a second recording layer having a second ferromagnetic resonant frequency. The first recording layer is configured for storing user data and the second recording layer configured for storing servo data. A recording head arrangement is configured for microwave-assisted magnetic recording (MAMR) and writing user data to the first recording layer. The recording head arrangement comprises a write pole configured to generate a write magnetic field, and a write-assist arrangement proximate the write pole. The write-assist arrangement is configured to generate a radiofrequency assist magnetic field at a frequency that corresponds to the first ferromagnetic resonant frequency. A reader of the recording head arrangement is configured to read combined signals from the first and second recording layers.

公开(公告)号：US10755736B2

公开(公告)日：2020-08-25

申请号：US16524544

申请日：2019-07-29

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Lihong Zhang ,  PengBoon Khoo

IPC: G11B5/00 ,  G11B5/596 ,  G11B20/10 ,  G11B20/12 ,  G11B5/66

Abstract: A magnetic recording medium includes a recording surface comprising a first recording layer having a first ferromagnetic resonant frequency and a second recording layer having a second ferromagnetic resonant frequency. The first recording layer is configured for storing user data and the second recording layer configured for storing servo data. A recording head arrangement is configured for microwave-assisted magnetic recording (MAMR) and writing user data to the first recording layer. The recording head arrangement comprises a write pole configured to generate a write magnetic field, and a write-assist arrangement proximate the write pole. The write-assist arrangement is configured to generate a radiofrequency assist magnetic field at a frequency that corresponds to the first ferromagnetic resonant frequency. A reader of the recording head arrangement is configured to read combined signals from the first and second recording layers.

公开(公告)号：US10249332B1

公开(公告)日：2019-04-02

申请号：US16013193

申请日：2018-06-20

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Lihong Zhang ,  PengBoon Khoo

IPC: G11B5/09 ,  G11B5/596 ,  G11B20/10 ,  G11B5/00

Abstract: A magnetic recording medium includes a recording surface comprising a first recording layer having a first ferromagnetic resonant frequency and a second recording layer having a second ferromagnetic resonant frequency. The first recording layer is configured for storing user data and the second recording layer configured for storing servo data. A recording head arrangement is configured for microwave-assisted magnetic recording (MAMR) and writing user data to the first recording layer. The recording head arrangement comprises a write pole configured to generate a write magnetic field, and a write-assist arrangement proximate the write pole. The write-assist arrangement is configured to generate a radiofrequency assist magnetic field at a frequency that corresponds to the first ferromagnetic resonant frequency. A reader of the recording head arrangement is configured to read combined signals from the first and second recording layers.