公开(公告)号：US20220343942A1

公开(公告)日：2022-10-27

申请号：US17658475

申请日：2022-04-08

Applicant: SHOWA DENKO K.K.

Inventor： Yoshihito SUEOKA ,  Koji ITOKAZU ,  Noriya SEIKI ,  Michitaka TAKASAKI

IPC: G11B5/012 ,  G11B5/127

Abstract: A magnetic storage apparatus includes a disk-shaped magnetic recording medium, a motor which drives and rotates the magnetic recording medium, a magnetic head, including a first magnetic head element which reads information from the magnetic recording medium, and a second magnetic head element which writes information to the magnetic recording medium, and a bias circuit which supplies a predetermined bias voltage to the first magnetic head element. The magnetic recording medium has a laminated structure including a magnetic layer disposed above a substrate, and a carbon protective layer disposed above the magnetic layer. The bias circuit supplies to the first magnetic head element a voltage which is in a range of −0.2 V to −1.0 V with respect to a potential of the magnetic recording medium.

公开(公告)号：US20210335389A1

公开(公告)日：2021-10-28

申请号：US17305414

申请日：2021-07-07

Applicant: SHOWA DENKO K.K.

Inventor： Yoshihito SUEOKA ,  Masato FUKUSHIMA

IPC: G11B21/08 ,  G11B5/012

Abstract: A storage apparatus includes a disk-shaped recording medium having a surface, a motor configured to drive and rotate the recording medium, a head configured to read information from and write information to the recording medium, a ramp mechanism configured to move the head from a position above the surface of the recording medium to a head receded position, and a ramp retracting mechanism configured to move the ramp mechanism from a position above the surface of the recording medium to a ramp retracted position. Each of the head receded position and the ramp retracted position is outside a range of the recording medium in a plan view viewed from above the recording medium in a direction perpendicular to the surface of the recording medium.

公开(公告)号：US20210201951A1

公开(公告)日：2021-07-01

申请号：US17108275

申请日：2020-12-01

Applicant: SHOWA DENKO K.K.

Inventor： Yoshihito SUEOKA ,  Masato FUKUSHIMA

IPC: G11B21/08 ,  G11B5/012 ,  G11B19/20

Abstract: A storage apparatus includes a disk-shaped recording medium, a motor configured to drive and rotate the recording medium, a head configured to read information from and write information to the recording medium, and a support member configured to support the recording medium when the recording bends in response to external vibration or shock. The support member supports the recording medium by making contact with the recording medium only when the external vibration or shock is applied to the storage apparatus.

公开(公告)号：US20210166729A1

公开(公告)日：2021-06-03

申请号：US17095934

申请日：2020-11-12

Applicant: SHOWA DENKO K.K.

Inventor： Yoshihito SUEOKA ,  Masato FUKUSHIMA

IPC: G11B21/08 ,  G11B5/012

Abstract: A storage apparatus includes a disk-shaped recording medium having a surface, a motor configured to drive and rotate the recording medium, a head configured to read information from and write information to the recording medium, a ramp mechanism configured to move the head from a position above the surface of the recording medium to a head receded position, and a ramp retracting mechanism configured to move the ramp mechanism from a position above the surface of the recording medium to a ramp retracted position. Each of the head receded position and the ramp retracted position is outside a range of the recording medium in a plan view viewed from above the recording medium in a direction perpendicular to the surface of the recording medium.