公开(公告)号：US20220406332A1

公开(公告)日：2022-12-22

申请号：US17878362

申请日：2022-08-01

Applicant: Seagate Technology LLC

Inventor： Yichao Ma ,  Xiong Liu

IPC: G11B5/48

Abstract: A data storage device includes a stack of data storage disks mounted on a spindle, a first arm and a second arm. The stack comprises a first plurality of upper disks and second plurality of lower disks. The first arm is movably attached to an actuator shaft, the first arm having a first head end that supports a first head, the first arm configured to move along a first portion of the actuator shaft to enable the first head to interact with data storage surfaces of the first plurality of upper disks. The second arm has a second head end that supports a second head, the second arm attached to and configured to move along a second portion of the actuator shaft, independently of the first arm, to enable the second head to interact with data storage surfaces of the second plurality of lower disks.

公开(公告)号：US11900965B2

公开(公告)日：2024-02-13

申请号：US17670627

申请日：2022-02-14

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Choon Kiat Lim ,  June Christian Ang ,  Yichao Ma

IPC: G11B21/24

CPC classification number: G11B21/24

Abstract: A data storage device includes a disc, an actuator arm assembly, a servo clock, and a feedback and control system. The disc includes a top and bottom surfaces and a servo wedge. The servo wedge includes a top surface boundary and a bottom surface boundary. The actuator arm assembly supports a head pair configured for interaction with the top and bottom surfaces. The servo clock is configured to determine a top time at which the head pair encounters the top surface boundary and a bottom time at which the head pair encounters the bottom surface boundary during a disc read/write interaction. The feedback and control system is configured to determine an operation time difference; compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and move the actuator arm assembly to the target vertical position.

公开(公告)号：US10998009B1

公开(公告)日：2021-05-04

申请号：US16676091

申请日：2019-11-06

Applicant: Seagate Technology LLC

Inventor： Yichao Ma ,  Yimin Niu ,  Xiong Liu ,  Lionel Young

IPC: G11B33/14 ,  G11B25/04

Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.

公开(公告)号：US20230260547A1

公开(公告)日：2023-08-17

申请号：US17670627

申请日：2022-02-14

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Choon Kiat Lim ,  June Christian Ang ,  Yichao Ma

IPC: G11B21/24

CPC classification number: G11B21/24

Abstract: A data storage device includes a disc, an actuator arm assembly, a servo clock, and a feedback and control system. The disc includes a top and bottom surfaces and a servo wedge. The servo wedge includes a top surface boundary and a bottom surface boundary. The actuator arm assembly supports a head pair configured for interaction with the top and bottom surfaces. The servo clock is configured to determine a top time at which the head pair encounters the top surface boundary and a bottom time at which the head pair encounters the bottom surface boundary during a disc read/write interaction. The feedback and control system is configured to determine an operation time difference; compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and move the actuator arm assembly to the target vertical position.

公开(公告)号：US11468909B1

公开(公告)日：2022-10-11

申请号：US17517061

申请日：2021-11-02

Applicant: Seagate Technology LLC

Inventor： Cho Kok Liang ,  Xiong Liu ,  Than Zaw Myint ,  Yichao Ma

IPC: G11B5/48

Abstract: A data storage device includes a base, a data storage disk, an actuator arm, a suspension, and a piezoelectric actuator. The data storage disk is attached to the base and has a read/write surface defining an x-y plane. The actuator arm is attached to the base at a first pivot point to rotate parallel to the x-y plane. The suspension is attached to the actuator arm at a second pivot point, the suspension having a first end comprising a curved edge surface, and a second end supporting a head that is configured to interact with the read/write surface. The piezoelectric actuator is disposed on the actuator arm and comprises a biasing finger configured to contact the curved edge surface to rotate the suspension parallel to the x-y plane about the second pivot point. An actuator arm assembly and a method of use are also described.

公开(公告)号：US11443763B1

公开(公告)日：2022-09-13

申请号：US17351804

申请日：2021-06-18

Applicant: Seagate Technology LLC

Inventor： Yichao Ma ,  Xiong Liu

IPC: G11B5/48

Abstract: A data storage device includes a stack of data storage disks mounted on a spindle, a first arm and a second arm. The stack comprises a first plurality of upper disks and second plurality of lower disks. The first arm is movably attached to an actuator shaft, the first arm having a first head end that supports a first head, the first arm configured to move along a first portion of the actuator shaft to enable the first head to interact with data storage surfaces of the first plurality of upper disks. The second arm has a second head end that supports a second head, the second arm attached to and configured to move along a second portion of the actuator shaft, independently of the first arm, to enable the second head to interact with data storage surfaces of the second plurality of lower disks.

公开(公告)号：US20210134331A1

公开(公告)日：2021-05-06

申请号：US16676091

申请日：2019-11-06

Applicant: Seagate Technology LLC

Inventor： Yichao Ma ,  Yimin Niu ,  Xiong Liu ,  Lionel Young

IPC: G11B33/14 ,  G11B25/04

Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.