公开(公告)号：US20180254061A1

公开(公告)日：2018-09-06

申请号：US15448514

申请日：2017-03-02

Applicant: Seagate Technology LLC

Inventor： Bin LU ,  Jan-Ulrich THIELE ,  Ganping JU ,  Xiaoding MA ,  YingGuo PENG ,  YinFeng DING

IPC: G11B5/66 ,  G11B5/65

CPC classification number: G11B5/66 ,  B32B15/04 ,  G11B5/65 ,  G11B2005/0021

Abstract: Provided herein is an apparatus including a layer stack. A first granular metal layer overlies the layer stack, wherein the first granular metal layer includes first metal grains separated by voids. A first granular non-metal layer overlies the first granular metal layer, wherein the first granular non-metal layer includes first non-metal grains separated by a first segregant. A second granular non-metal layer overlies the first granular non-metal layer, wherein the second granular non-metal layer includes second non-metal grains separated by a second segregant. A second granular metal layer overlies the second granular non-metal layer, wherein the second granular metal layer includes second metal grains separated by a third segregant.

公开(公告)号：US20180286441A1

公开(公告)日：2018-10-04

申请号：US15472089

申请日：2017-03-28

Applicant: Seagate Technology LLC

Inventor： Bin LU

IPC: G11B5/65 ,  G11B5/82

Abstract: An apparatus is disclosed. The apparatus includes a storage layer, an exchange tuning layer, and a write layer. The storage layer is magnetic. The exchange tuning layer is disposed over the storage layer. The exchange tuning layer is weakly magnetic. The write layer is disposed over the exchange tuning layer. The write layer is magnetic and the exchange tuning layer magnetically weakens magnetic coupling between the storage layer and the write layer.

公开(公告)号：US20180218752A1

公开(公告)日：2018-08-02

申请号：US15422379

申请日：2017-02-01

Applicant: Seagate Technology LLC

Inventor： Bin LU ,  Yingguo PENG ,  Jan-Ulrich THIELE

IPC: G11B5/73 ,  G11B5/84 ,  G11B5/851 ,  G11B5/667

CPC classification number: G11B5/7325 ,  G11B5/66

Abstract: Provided herein is a method including depositing an amorphous magnetic soft underlayer (SUL) over a substrate. A first portion of a heatsink layer is deposited over the SUL, wherein the first portion includes first heat conductive grains that are separated by first grain boundaries. A second portion of the heatsink layer is deposited over the first portion, wherein the second portion includes second heat conductive grains that are separated by second grain boundaries. The second grain boundaries are thicker than the first grain boundaries. A third portion of the heatsink layer is deposited over the second portion, wherein the third portion includes third heat conductive grains that are separated by third grain boundaries. The third grain boundaries are thicker than the second grain boundaries. A granular recording layer is deposited over the heatsink layer.

公开(公告)号：US20170338829A1

公开(公告)日：2017-11-23

申请号：US15276802

申请日：2016-09-27

Applicant: Seagate Technology LLC

Inventor： Bin LU

IPC: H03L7/26

CPC classification number: H03B5/00 ,  G01R33/0213 ,  G01R33/093 ,  H03B15/006 ,  H03B2200/0076 ,  H03L7/26

Abstract: An apparatus includes a spin torque oscillator, a sensor, and a processing unit. The spin torque oscillator is configured to receive a current and to generate a microwave output signal. The sensor is configured to detect the microwave output signal and to detect changes to frequency of the detected microwave output signal responsive to changes in an external magnetic field. The processing unit is configured to receive a sensed signal from the sensor. The processing unit is further configured to process the sensed signal and the changes to the frequency to determine magnitude and direction associated with the external magnetic field.