公开(公告)号：US09960618B1

公开(公告)日：2018-05-01

申请号：US14608175

申请日：2015-01-28

Applicant: SEAGATE TECHNOLOGY, LLC

Inventor： Ashutosh Razdan ,  Philip Yin ,  Felix Markhovsky

IPC: H02J7/00

CPC classification number: H02J7/0052 ,  H02J7/0044 ,  H02J7/007

Abstract: Devices having battery charge control circuits are disclosed. Such devices can include power control circuits operable to receive electrical power at a connector, and provide power to electrical components, including a charge current for a rechargeable battery; and a controller circuit configured to determine and store a maximum charge current setting based on whether a voltage at the connector falls below a predetermined limit as the charge current is increased. Corresponding methods are also disclosed.

公开(公告)号：US09960570B1

公开(公告)日：2018-05-01

申请号：US15601024

申请日：2017-05-22

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Mark Anthony Gubbins ,  Michael James Hardy ,  Kelly Elizabeth Hamilton

IPC: G11B11/00 ,  H01S5/14 ,  H01S5/042 ,  G11B5/48 ,  G11B5/00 ,  G11B7/126 ,  G11B5/60

CPC classification number: H01S5/14 ,  G11B5/4866 ,  G11B5/6088 ,  G11B7/126 ,  G11B2005/0021 ,  H01S3/08045 ,  H01S3/0805 ,  H01S3/08068

Abstract: A slider includes a slot waveguide configured to receive energy from an input surface. The slot waveguide has first and second high-index regions surrounding a middle region that extends along a light propagation direction. The middle region has a refractive index less than that of the first and second high index regions. A near-field transducer is at an output portion of the middle region at media-facing surface. The near-field transducer has first and second plates parallel to the media-facing surface with a gap therebetween. An active laser region has a front facet optically coupled to the input surface of the slider. A reflective back facet of the laser and the near-field transducer define a single optical resonator.

公开(公告)号：US20180114542A1

公开(公告)日：2018-04-26

申请号：US15671262

申请日：2017-08-08

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Edward Charles Gage ,  Joshua Ward Christensen ,  Todd Michael Lammers

IPC: G11B7/1263 ,  H01S5/0683 ,  G11B5/012 ,  H01S5/042 ,  G11B5/00

CPC classification number: G11B5/012 ,  G11B2005/0021 ,  H01S5/0427 ,  H01S5/0683

Abstract: Before writing to a heat-assisted magnetic recording medium, a DC signal modulated with an AC signal is applied to a laser of a read/write head. A modulation level of an optical power sensor is measured, the optical power sensor being coupled to detect optical output of the laser in response to the modulated current. A target value of the DC signal that causes the modulation levels to reach a predetermined value between zero and a maximum value is determined and used to set a bias current for subsequent activation of the laser based.

公开(公告)号：US09955596B2

公开(公告)日：2018-04-24

申请号：US15233410

申请日：2016-08-10

Applicant: Seagate Technology LLC

Inventor： William Gunther Voss ,  Donald R. Bloyer ,  Nathan Loren Lester

IPC: H05K5/03 ,  H05K5/00 ,  H05K1/02 ,  H05K1/14 ,  H05K3/36 ,  H05K5/02

CPC classification number: H05K5/0069 ,  G11C5/06 ,  H05K1/0201 ,  H05K1/142 ,  H05K1/144 ,  H05K1/147 ,  H05K3/361 ,  H05K3/368 ,  H05K5/0217 ,  H05K5/03 ,  H05K2201/042 ,  H05K2201/10159 ,  H05K2201/10409

Abstract: A memory cartridge for use during assembly of a storage drive apparatus. The memory cartridge includes a first memory printed circuit board (PCB). The memory cartridge also includes a second memory PCB, where the second memory PCB is operatively coupled to the first memory PCB by a first flexible connection. The memory cartridge also includes a chassis configured to fasten to the first memory PCB and to the second memory PCB such that the first and second memory PCBs have a spaced relationship to each other, and where the spaced relationship defines a gap.

公开(公告)号：US09954537B1

公开(公告)日：2018-04-24

申请号：US15390453

申请日：2016-12-23

Applicant: Seagate Technology LLC

Inventor： Marcus Marrow ,  Kenneth John Evans ,  Jason Vincent Bellorado

IPC: H03L7/081 ,  H03L7/08 ,  H03L7/18 ,  H03K5/135

CPC classification number: H03L7/08 ,  G06F1/022 ,  H03K5/135 ,  H03L7/0814

Abstract: In certain embodiments, an apparatus may comprise a circuit configured to scale a phase control value from an external phase control resolution of an external clock frequency to an internal phase control resolution of an internal clock frequency to generate a target phase control value. The circuit may also determine a difference between a current phase control value and the target phase control value and determine a phase step value based on the difference. Further, the circuit may modify a current phase control value based on the phase step value and generate a phase controlled clock signal at the internal clock frequency using the modified phase control value. Additionally, the circuit may divide the phase controlled clock signal at the internal clock frequency to generate a phase controlled clock signal at the external clock frequency.

公开(公告)号：US09952794B2

公开(公告)日：2018-04-24

申请号：US15194179

申请日：2016-06-27

Applicant: Seagate Technology LLC

Inventor： Andrew Michael Kowles

IPC: G06F3/06 ,  G06F12/0802

CPC classification number: G06F3/0638 ,  G06F3/0604 ,  G06F3/061 ,  G06F3/0656 ,  G06F3/0673 ,  G06F12/0802 ,  G06F2212/60

Abstract: A storage device or storage system includes a transient compression layer that is established based on a level of finishedness of the capacity of the storage device or storage system. Data may be compressed and written to the transient compression layer until the capacity is sufficiently finished, after which the compressed data may be destaged and written to the capacity. The transient compression layer may be established on a hard disc media of the storage system or in a SSD of the storage system.

公开(公告)号：US09947349B2

公开(公告)日：2018-04-17

申请号：US14863096

申请日：2015-09-23

Applicant: Seagate Technology LLC

Inventor： Chubing Peng

IPC: G02B6/26 ,  G11B5/48 ,  G02B6/122 ,  G02B6/12 ,  G11B5/00

CPC classification number: G11B5/4866 ,  G02B6/12002 ,  G02B6/1228 ,  G02B2006/12038 ,  G02B2006/12147 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

Abstract: An apparatus includes a waveguide extending along a light-propagation direction between a light source and a media-facing surface. An assistant layer is configured to receive light from a light source, the assistant layer has a terminating end with a first taper that narrows toward the media-facing surface. A core layer has a coupling end configured to receive light from the assistant layer, the coupling end having a second taper that widens toward the media-facing surface. A middle cladding layer is disposed between the core layer and the assistant layer. A near field transducer is disposed proximate the media-facing surface and configured to receive the light from the core layer.

公开(公告)号：US20180102137A1

公开(公告)日：2018-04-12

申请号：US15837423

申请日：2017-12-11

Applicant: SEAGATE TECHNOLOGY LLC.

Inventor： Yuhang Cheng ,  Sami Antrazi ,  Michael Seigler ,  Scott Franzen ,  Philip G. Pitcher ,  Edwin F. Rejda ,  Kurt W. Wierman

IPC: G11B5/31 ,  G11B5/00

Abstract: Methods that include forming at least a portion of a near field transducer (NFT) structure; depositing a material onto at least one surface of the portion of the NFT to form a metal containing layer; and subjecting the metal containing layer to conditions that cause diffusion of at least a portion of the material into the at least one surface of the portion of the NFT; and devices formed thereby.

公开(公告)号：US20180100968A1

公开(公告)日：2018-04-12

申请号：US15840152

申请日：2017-12-13

Applicant: Seagate Technology LLC

Inventor： Richard C.A. Pitwon

IPC: G02B6/138 ,  G02B6/125 ,  G02B6/122

CPC classification number: G02B6/138 ,  G02B6/1221 ,  G02B6/125

Abstract: A waveguide includes a segment with a substantially uniform cure profile and related methods and systems for making and using the same. The waveguide is formed by modifying a laser beam used to write the waveguide to provide a substantially uniform cure profile in the waveguide. A marker characteristic of laser writing may be present in the waveguide. A method or system modifies an intensity profile or a shape profile of a laser beam to proactively compensate for exposure convolution based on the characteristics of the laser beam spot profile. A convolution compensator is positioned in the path of the laser beam to modify the beam spot profile during writing to form the one or more segments of the waveguide in a photo-curable layer.

公开(公告)号：US09941901B2

公开(公告)日：2018-04-10

申请号：US15055006

申请日：2016-02-26

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Zhengang Chen ,  Yunxiang Wu ,  Erich F. Haratsch

IPC: H03M13/11 ,  G06F11/10 ,  G11C29/52

CPC classification number: H03M13/1111 ,  G06F11/1008 ,  G06F11/1012 ,  G06F11/1072 ,  G11C29/52 ,  H03M13/1154

Abstract: Systems and method relating generally to solid state memory, and more particularly to systems and methods for generated data from a solid state memory. A data processing system includes a solid state memory device, a soft data generation circuit operable to receive multiple instances of an element of a read data set accessed from the solid state memory device, and access a scramble compensating extended look up table using the multiple instances of the element to receive corresponding soft data, and a data decoder circuit operable to yield a decoded output from the soft data.