Western Digital Technologies, Inc.

United States of America

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New (last 4 weeks) 12
2024 June (MTD) 12
2024 March 2
2024 February 1
2024 (YTD) 15
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IPC Class
G06F 3/06 - Digital input from, or digital output to, record carriers 6
G11B 25/04 - Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing using flat record carriers, e.g. disc, card 5
G11B 33/02 - Cabinets; Cases; Stands; Disposition of apparatus therein or thereon 5
G11B 33/12 - Disposition of constructional parts in the apparatus, e.g. of power supply, of modules 4
G11B 33/14 - Reducing influence of physical parameters, e.g. temperature change, moisture, dust 4
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Status
Pending 21
Registered / In Force 9
Found results for  patents

1.

Read Sensor With Ordered Heusler Alloy Free Layer and Semiconductor Barrier Layer

      
Application Number 18227537
Status Pending
Filing Date 2023-07-28
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Zheng, Yuankai
  • Okamura, Susumu
  • York, Brian R.
  • Diao, Zhitao
  • Freitag, James Mac

Abstract

Embodiments of the present disclosure generally relate to a read sensor utilized in a read head. The read sensor comprises an amorphous break layer disposed on a shield, a seed layer disposed on the amorphous break layer, a first ferromagnetic layer disposed on the seed layer, a barrier layer disposed on the first ferromagnetic layer, and a second ferromagnetic layer disposed on the barrier layer. The amorphous break layer comprises CoFeBTa, the seed layer comprises RuAl, and the barrier layer comprises a semiconductor material, such as ZnSe, ZnTe, ZnO, CuSe, or CuInGaSe. The semiconductor barrier layer reduces the resistance-area product of the read sensor. The amorphous break layer breaks the texture between the shield, which has a FCC texture, and the seed layer, which has a BCC texture. The BCC texture of the seed layer is then inherited by the remaining layers disposed over the seed layer.

IPC Classes  ?

  • G11B 5/31 - Structure or manufacture of heads, e.g. inductive using thin film
  • G11B 5/39 - Structure or manufacture of flux-sensitive heads using magneto-resistive devices

2.

MEMORY DEVICE AND METHOD OF ASSEMBLING SAME

      
Application Number 18356838
Status Pending
Filing Date 2023-07-21
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Wong, Chee Seng
  • Chin, Yoong Tatt
  • Teng, Wei Chiat

Abstract

Technology for a memory device having memory dies flip-chip bonded to one or more interposers that are mounted to a system board is disclosed. The memory device may be an SSD and the system board may be an M.2 board. A memory controller die may be bonded to one of the interposer boards. In one aspect, the memory controller die is flip-chip bonded to the interposer board. In one aspect, a heat sink is attached to a top surface of the flip-chip bonded controller die and to top surfaces of a group of the memory dies. Neither the memory dies nor the interposers are covered with a mold compound. Performance of the memory device is improved by, for example, lower inductance and improved heat dissipation.

IPC Classes  ?

  • H01L 23/367 - Cooling facilitated by shape of device
  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
  • H01L 23/498 - Leads on insulating substrates
  • H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
  • H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
  • H10B 80/00 - Assemblies of multiple devices comprising at least one memory device covered by this subclass

3.

RAISEABLE PROFILE-BASED ACCESS FOR MEDIA CONTENT

      
Application Number 18446442
Status Pending
Filing Date 2023-08-08
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Shukla, Arun Kumar
  • Muthiah, Ramanathan

Abstract

A media playback device is configured to control access to a plurality of files. The media playback device includes memory configured to store a plurality of files, the plurality of files including at least a first set of files and a second set of files, the second set of files having a higher security level the first set of files. The media playback device also includes control circuitry that can be configured to receive a first login from a user, determine that the first login is associated with a user profile associated with the first set of files and the second set of files, provide access to the first set of files in response to validating the first login while keeping the second set of files locked, receive a second login, and provide access to the second set of files in response to validating the second login.

IPC Classes  ?

  • G06F 21/32 - User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
  • G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules

4.

ERROR CORRECTION SYSTEMS AND METHODS FOR DNA STORAGE

      
Application Number 18356104
Status Pending
Filing Date 2023-07-20
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Avraham, David
  • Zamir, Ran
  • Bazarsky, Alexander

Abstract

A DNA-based storage system includes an error correction system operable to: (a) identify a DNA codeword from a DNA sequencing operation; (b) calculate an initial syndrome weight; (c) determine that the initial syndrome weight is greater than a predetermined threshold; (d) perform an alignment alteration in the information segment by: (i) selecting a skew point within the information segment; (ii) performing an indel operation on the information segment at the skew point; (iii) calculating a modified syndrome weight; (iv) comparing the initial syndrome weight with the modified syndrome weight; and (v) incorporating the indel operation into the information segment when the comparing indicates an improvement in the modified syndrome weight; (e) decode the modified codeword; and (f) transmit the contents of the output file to a computing device, the output file representing user data stored within the DNA molecule.

IPC Classes  ?

  • G06F 11/10 - Adding special bits or symbols to the coded information, e.g. parity check, casting out nines or elevens
  • G16B 30/00 - ICT specially adapted for sequence analysis involving nucleotides or amino acids
  • G16B 50/30 - Data warehousing; Computing architectures

5.

DE-FRAGMENTATION ACCELERATION USING OVERLAP TABLE

      
Application Number 18355097
Status Pending
Filing Date 2023-07-19
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Segev, Amir
  • Benisty, Shay

Abstract

The present disclosure generally relates to improved fragment processing while command fetching is on-going. Rather than stopping command fetching, the controller uses a short fragment list, while command fetching can continue, to add a fragment. The controller first adds new fragments to the short list with the fragment information. The information is then checked for size. If the fragment information is smaller than the short fragment list, then the fragment list is updated during command fetching. As a command arrives, the controller does a binary search of a sorted fragment list. The results are stored and later scanned by the controller for matches with the short fragment list. If there are no matches in the short list, then the controller uses the stored results to update the search result. If there is a match in the short list then the controller uses the new results to update the search list.

IPC Classes  ?

  • G06F 3/06 - Digital input from, or digital output to, record carriers

6.

DATA STORAGE DEVICE BACKUP

      
Application Number 18365017
Status Pending
Filing Date 2023-08-03
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Nayak, Dattatreya
  • Shukla, Arun

Abstract

This disclosure relates to systems, methods, and data storage devices, such as a data storage device comprising a data path and a controller. The data path comprises a data port to transmit data between a host computer system and the data storage device. The data storage device registers with the host computer system as a block data storage device. A non-volatile storage medium stores encrypted user content data. A cryptography engine is connected between the data port and the storage medium and uses cryptographic key data to encrypt and decrypt user content data. The controller is configured to send the encrypted user content data for back-up storage external to the data storage device as encrypted by the cryptographic key data, and communicate with a user device over a communication channel that is different from the data path, to send the cryptographic key data for decryption of the encrypted user content external to the data storage device.

IPC Classes  ?

7.

SEGREGATING LARGE DATA BLOCKS FOR DATA STORAGE SYSTEM

      
Application Number 18449428
Status Pending
Filing Date 2023-08-14
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Yang, Niles
  • Linnen, Daniel J.
  • Hahn, Judah Gamliel

Abstract

Methods and apparatus for efficiently handling large data files and their updates in NAND memory. In one example, provided is a data-storage system configured to reduce the frequency of data relocations by segregating a large data file into a plurality of subfiles. The size of such subfiles is appropriately selected to reduce the probability of occurrence for host-relocation conflicts and the magnitude of write amplification, thereby enabling the data-storage system to provide better quality of service while substantially maintaining acceptable levels of other pertinent performance characteristics. In some examples, a sequence of host read-modify-write commands is handled by generating a copy of implicated subfiles in a data buffer, applying subfile updates to the copy in the data buffer in accordance with the sequence, and relocating the implicated subfiles in the NAND memory using the updated versions thereof from the data buffer.

IPC Classes  ?

  • G06F 3/06 - Digital input from, or digital output to, record carriers

8.

SYSTEMS AND METHODS FOR IMPROVING FIND LAST GOOD PAGE PROCESSING IN MEMORY DEVICES

      
Application Number 18356693
Status Pending
Filing Date 2023-07-21
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Gueta, Asaf
  • Star, Arie
  • Fainzilber, Omer
  • Sharon, Eran

Abstract

A storage device includes a memory die and a controller. The controller identifies a dirty block that was subject to an interrupted I/O operation and performs a coarse inspection of the dirty block. Each iteration of the coarse inspection includes: requesting first bytes of a current page of the dirty block; receiving contents of the first bytes from the at least one memory die; and evaluating a state of the current page based on the contents of the first bytes. The controller also determines an initial last good page based on the coarse inspection and performs a fine inspection of at least one page based on a second number of bytes greater than the first number of bytes. The fine inspection validates the initial last good page and identifies the initial last good page as an actual last good page of the dirty block.

IPC Classes  ?

  • G06F 3/06 - Digital input from, or digital output to, record carriers

9.

MEMORY PREFETCH BASED ON MACHINE LEARNING

      
Application Number 18231730
Status Pending
Filing Date 2023-08-08
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Sun, Chao
  • Wang, Qingbo
  • Qin, Minghai
  • Hofmann, Jaco
  • Kulkarni, Anand
  • Vucinic, Dejan
  • Bandic, Zvonimir

Abstract

A memory device includes a first memory and a second memory that caches data stored in the first memory. At least one controller of the memory device receives page fault information from a host. The page fault information results from a request for data by the host that is stored in the first memory but is not cached in the second memory when requested by the host. The memory device uses the received page fault information for one or more inputs into a prefetch model trained by Machine Learning (ML) to generate at least one inference. Based at least in part on the at least one inference, prefetch data is cached in the second memory. In one aspect, the page fault information is used to train the prefetch model. In another aspect, the page fault information includes at least one virtual address used by the host for the requested data.

IPC Classes  ?

  • G06F 12/0862 - Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches with prefetch
  • G06N 20/00 - Machine learning

10.

STORAGE OF CONTROL DATA INFORMATION

      
Application Number 18447774
Status Pending
Filing Date 2023-08-10
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Swami, Maharudra Nagnath
  • Divya, G K
  • Menezes, Naveen
  • Jain, Nitin

Abstract

Methods for storing control information for memory operations within spare physical blocks. During formatting of a data storage device, spare memory blocks may be identified within memory dies and placed into a spare block pool. Upon initiation of a block exchange event for a control block, a controller determines whether a spare block is available in the spare block pool. When a spare block is available, data from the control block is copied to the spare block to generate a debug block. The control block may be a MasterIndexPage block. When a spare block is not available, the controller may erase information stored in an oldest debug memory block and copy data from the control block to the oldest debug memory block.

IPC Classes  ?

  • G06F 3/06 - Digital input from, or digital output to, record carriers

11.

VALLEY SEARCH SCAN BIT LINE SELECTION METHOD TO ADDRESS MEMORY HOLE AND STRING PROCESS VARIATION

      
Application Number 18219456
Status Pending
Filing Date 2023-07-07
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Chen, Chin-Yi
  • Kumar, Ravi
  • Dutta, Deepanshu

Abstract

A memory apparatus and operating method are provided. The apparatus includes memory cells connected to one of a plurality of word lines and disposed in memory holes coupled to bit lines. The memory cells are configured to retain a threshold voltage corresponding to one of a plurality of data states. A control means is coupled to the plurality of word lines and the bit lines and for a group of the memory cells divided into a plurality of subsets, is configured to determine whether comparatively fewer read errors of the memory cells arise while pre-charging ones of the bit lines associated with each of the plurality of subsets. The control means is also configured to pre-charge ones of the bit lines associated with one the plurality of subsets with comparatively fewer read errors and read the memory cells associated therewith during a scan operation.

IPC Classes  ?

  • G11C 29/12 - Built-in arrangements for testing, e.g. built-in self testing [BIST]

12.

PIVOT-TO-ENCLOSURE FASTENING FOR REDUCING TORSIONAL VIBRATION OF ACTUATOR COIL IN HARD DISK DRIVE

      
Application Number 18128862
Status Pending
Filing Date 2023-03-30
First Publication Date 2024-06-13
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Takabayashi, Ko
  • Eguchi, Hajime
  • Sumiya, Takeji

Abstract

A hard disk drive includes a rotary actuator installed about a pivot having a hollow pivot shaft having a pivot shaft length, a base having a pivot boss shaft including an internal threaded portion and disposed within the pivot shaft, and a screw coupled with the threaded portion of the pivot boss shaft through a cover, where the screw has a fastening depth at which center threads of the threaded portion of the pivot boss shaft are coupled with screw threads at 66% or more of the pivot shaft length. Thus, the thermal expansion of the pivot boss shaft at high temperatures is inhibited and the corresponding axial fastening force of the screw is maintained, thereby inhibiting increasing coil torsion mode gain and lowering of the actuator main resonance frequency and consequent closer coupling with the coil torsion mode at high temperatures.

IPC Classes  ?

  • G11B 5/48 - Disposition or mounting of heads relative to record carriers
  • G11B 25/04 - Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing using flat record carriers, e.g. disc, card

13.

CENTER STRUCTURE HAVING ATTACHMENT SUPPORT FOR AN ACTUATOR IN A MULTI-ACTUATOR HARD DISK DRIVE

      
Application Number 18226584
Status Pending
Filing Date 2023-07-26
First Publication Date 2024-03-28
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Park, Jung-Seo
  • Hitchner, Thomas J.
  • Mcnab, Robert
  • Sakhalkar, Siddhesh Vivek

Abstract

A multi-actuator hard disk drive includes a lower actuator with a corresponding voice coil motor assembly (VCMA), a coaxial upper actuator with a corresponding VCMA, and a central support plate positioned between the upper and lower VCMAs and to which the upper VCMA is fastened. Use of a central support plate enables some control over the direct and coupled plant transfer functions, while effectively providing a base support structure for the upper VCMA and enabling use of conventionally-sized fasteners.

IPC Classes  ?

  • G11B 5/55 - Track change, selection, or acquisition by displacement of the head
  • G11B 33/02 - Cabinets; Cases; Stands; Disposition of apparatus therein or thereon

14.

DC AND SYNCHRONIZED ENERGY ASSISTED PERPENDICULAR MAGNETIC RECORDING (EPMR) DRIVER CIRCUIT FOR HARD DISK DRIVE (HDD)

      
Application Number 18467045
Status Pending
Filing Date 2023-09-14
First Publication Date 2024-03-28
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Poss, Joey M.
  • Ding, Yunfei
  • Contreras, John T.

Abstract

Various illustrative aspects are directed to a data storage device comprising a storage medium and a head configured to access the storage medium. The head comprises a first write assist element and a second write assist element. Control circuitry for driving the head is configured to apply a first write assist current Im that is synchronized to a write data current Iw to the first write assist element; and to apply a second DC write assist current Imdc to the second write assist element.

IPC Classes  ?

  • G11B 5/02 - Recording, reproducing or erasing methods; Read, write or erase circuits therefor

15.

FLEXIBLE PRINTED CIRCUIT FINGER LAYOUT FOR LOW CROSSTALK

      
Application Number 18379587
Status Pending
Filing Date 2023-10-12
First Publication Date 2024-02-01
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Kishimoto, Masahiro
  • Contreras, John
  • Nagaoka, Kazuhiro
  • Nakamura, Satoshi

Abstract

A flexible printed circuit (FPC) for a hard disk drive includes a plurality of electrical traces, whereby aggressor traces are isolated from victim traces to avoid crosstalk that could degrade signals. Aggressor traces may be positioned together at one of the edges of each of the top wiring layer and the bottom wiring layer, physically isolated from victim traces. Aggressor traces may be grouped together at either the top wiring layer or the bottom wiring layer, with the victim traces positioned on the layer opposing the aggressor traces. With aggressor and victim traces routed on the same wiring layer, aggressor traces may be routed away from the victim traces with multi-layer routing, by way of vias.

IPC Classes  ?

16.

COAL-BASED SOLID WASTE TRANSPORT AND FILLING INTEGRATED MACHINE MINING SYSTEM AND METHOD

      
Application Number 18227411
Status Pending
Filing Date 2023-07-28
First Publication Date 2023-11-30
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Feng, Feisheng
  • Wang, Min
  • Zhang, Jiqiang
  • Zhang, Tong
  • Tu, Qingyi
  • Chen, Qisheng

Abstract

The present invention provides a coal-based solid waste transport and filling integrated machine mining system, comprising a filling hydraulic support (6) and a coal winning machine (7), said filling hydraulic support (6) comprises a hydraulic top plate and a base (601), said hydraulic top plate comprises a hinged front top beam (602) and a rear top beam (603), with a front probe beam (604) attached to front end of said front top beam (602) and a telescopic slide rod (1) connected to rear end of said rear top beam (603), a double transport and single filling non-stop equipment is fixed on the telescopic slide rod (1). The apparatus and method of the present invention weaken the impact of groundwater pollution on mine production and mine ecology, bring good economic and environmental benefits to the mine and promoting safe and green coal mining.

IPC Classes  ?

  • E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
  • E21F 15/06 - Filling-up mechanically
  • E21F 15/00 - Methods or devices for placing filling-up materials in underground workings
  • E21F 13/00 - Transport specially adapted to underground conditions
  • C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
  • C04B 18/14 - Waste materials; Refuse from metallurgical processes
  • C04B 18/24 - Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper

17.

METHOD OF MAKING A THREE-DIMENSIONAL MEMORY DEVICE USING COMPOSITE HARD MASKS FOR FORMATION OF DEEP VIA OPENINGS

      
Application Number 17657521
Status Pending
Filing Date 2022-03-31
First Publication Date 2022-07-14
Owner
  • WESTERN DIGITAL TECHNOLOGIES, INC., (USA)
  • INC., WESTERN DIGITAL TECHNOLOGIES (USA)
Inventor
  • Tirukkonda, Roshan Jayakhar
  • Titus, Monica
  • Kanakamedala, Senaka
  • Makala, Raghuveer S.
  • Sharangpani, Rahul
  • Rajashekar, Adarsh

Abstract

A method of forming a structure includes forming an alternating stack of first material layers and second material layers over a substrate, forming a mask layer over the alternating stack, forming a cavity in the mask layer, forming a first cladding liner on a sidewall of the cavity in the mask layer, and forming a via opening the alternating stack by performing an anisotropic etch process that transfers a pattern of the cavity in the mask layer through the alternating stack using a combination of the first cladding liner and the mask layer as an etch mask.

IPC Classes  ?

  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • H01L 21/306 - Chemical or electrical treatment, e.g. electrolytic etching

18.

METHOD OF MAKING A THREE-DIMENSIONAL MEMORY DEVICE USING COMPOSITE HARD MASKS FOR FORMATION OF DEEP VIA OPENINGS

      
Application Number 17590278
Status Pending
Filing Date 2022-02-01
First Publication Date 2022-06-30
Owner
  • WESTERN DIGITAL TECHNOLOGIES, INC., (USA)
  • INC., WESTERN DIGITAL TECHNOLOGIES (USA)
Inventor
  • Titus, Monica
  • Tirukkonda, Roshan Jayakhar
  • Kanakamedala, Senaka
  • Makala, Raghuveer S.

Abstract

A method includes forming an alternating stack of first and second layers, forming a composite hard mask layer over the alternating stack, forming openings in the hard mask, and forming via openings through the alternating stack by performing an anisotropic etch process that transfers a pattern of the openings in the composite hard mask layer through the alternating stack. The compositing hard mask includes a first cladding material layer which has higher etch resistance than upper and lower patterning films of the composite hard mask.

IPC Classes  ?

  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout

19.

METHOD OF MAKING A THREE-DIMENSIONAL MEMORY DEVICE USING COMPOSITE HARD MASKS FOR FORMATION OF DEEP VIA OPENINGS

      
Application Number 17494114
Status Pending
Filing Date 2021-10-05
First Publication Date 2022-06-30
Owner
  • WESTERN DIGITAL TECHNOLOGIES, INC., (USA)
  • INC., WESTERN DIGITAL TECHNOLOGIES (USA)
Inventor
  • Okamoto, Katsufumi
  • Titus, Monica

Abstract

An alternating stack of first material layers and second material layers is formed over a substrate. A hard mask layer is formed over the alternating stack and cavities are formed in the hard mask layer. A cladding liner is formed on sidewalls of the cavities in the hard mask layer. Via openings are formed through each layer within the alternating stack by performing an anisotropic etch process that transfers a pattern of the cavities through the alternating stack.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

20.

METHOD OF MAKING A THREE-DIMENSIONAL MEMORY DEVICE USING COMPOSITE HARD MASKS FOR FORMATION OF DEEP VIA OPENINGS

      
Application Number 17508036
Status Pending
Filing Date 2021-10-22
First Publication Date 2022-06-30
Owner
  • WESTERN DIGITAL TECHNOLOGIES, INC., (USA)
  • INC., WESTERN DIGITAL TECHNOLOGIES (USA)
Inventor
  • Tirukkonda, Roshan Jayakhar
  • Kanakamedala, Senaka
  • Makala, Raghuveer S.
  • Sharangpani, Rahul
  • Titus, Monica
  • Rajashekhar, Adarsh

Abstract

A source-level semiconductor layer and an alternating stack of first material layers and second material layers is formed above a substrate. A hard mask layer is formed over the alternating stack, and is subsequently patterned to provide a pattern of cavities therethrough. Via openings are formed through the alternating stack by performing an anisotropic etch process. A cladding liner is formed on sidewalls of the cavities in the hard mask layer and on a top surface of the hard mask layer. The via openings are vertically extended at least through the source-level semiconductor layer by performing a second anisotropic etch process employing a combination of the cladding liner and the hard mask layer as an etch mask.

IPC Classes  ?

  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • H01L 21/306 - Chemical or electrical treatment, e.g. electrolytic etching
  • H01L 21/308 - Chemical or electrical treatment, e.g. electrolytic etching using masks

21.

Interface adjustment processes for a data storage device

      
Application Number 16160496
Grant Number 10635131
Status In Force
Filing Date 2018-10-15
First Publication Date 2019-02-14
Grant Date 2020-04-28
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor Tzafrir, Yonatan

Abstract

A data storage device includes a controller and a memory die. The controller includes a host interface and a memory interface. A method includes receiving a message from a host device via the host interface. The message indicates that the host device is to perform a first adjustment process associated with the host interface. The method further includes performing a second adjustment process associated with the memory interface in response to receiving the message indicating that the host device is to perform the first adjustment process.

IPC Classes  ?

  • G06F 1/12 - Synchronisation of different clock signals
  • G06F 1/04 - Generating or distributing clock signals or signals derived directly therefrom
  • G06F 13/16 - Handling requests for interconnection or transfer for access to memory bus
  • G06F 13/42 - Bus transfer protocol, e.g. handshake; Synchronisation
  • H03M 13/05 - Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
  • G11C 29/02 - Detection or location of defective auxiliary circuits, e.g. defective refresh counters

22.

Base unit and disk drive apparatus

      
Application Number 16104585
Grant Number 10347301
Status In Force
Filing Date 2018-08-17
First Publication Date 2018-12-27
Grant Date 2019-07-09
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor
  • Akagi, Masahiro
  • Ohiro, Takeshi
  • Yoneda, Tomohiro
  • Yudate, Akihiro
  • Ishino, Takayuki
  • Nakamura, Sho

Abstract

A base member includes a recessed portion extending in radial directions and recessed upward from a lower surface of the base member and a hole extending through the recessed portion in the vertical direction. The recessed portion includes a recessed portion loop-shaped surface defining a loop-shaped surface in the radial direction. A connector is located on a lower side of the recessed portion to cover the hole portion. An adhesive is located between the connector and the recessed portion. A minimum value of a gap distance in the radial direction between an outer end of the connector and an inner end of the recessed portion in which the outer end of the connector and the inner end of the recessed portion are opposed to each other with the adhesive therebetween is greater than a minimum value of a gap in the vertical direction distance between an upper surface of the connector and the recessed portion loop-shaped surface, in which the upper surface of the connector and the recessed portion loop-shaped surface are opposed to each other with the adhesive therebetween. The adhesive includes an inorganic filler.

IPC Classes  ?

  • G11B 33/12 - Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
  • G11B 33/14 - Reducing influence of physical parameters, e.g. temperature change, moisture, dust
  • G11B 25/04 - Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing using flat record carriers, e.g. disc, card
  • G11B 33/02 - Cabinets; Cases; Stands; Disposition of apparatus therein or thereon

23.

BASE UNIT AND DISK DRIVE APPARATUS

      
Application Number 16019362
Status Pending
Filing Date 2018-06-26
First Publication Date 2018-10-25
Owner Western Digital Technologies, Inc. (USA)
Inventor
  • Kaneko, Jiro
  • Hayakawa, Takako
  • Sudo, Kimihiko
  • Onobu, Yuta

Abstract

A base member includes a recessed portion arranged to extend in radial directions and recessed upward from a lower surface of the base member, the radial directions being directions perpendicular to a vertical direction or directions parallel to these directions; and a hole portion arranged to pass through the recessed portion in the vertical direction. The recessed portion includes a recessed portion loop-shaped surface being a loop-shaped surface perpendicular to the vertical direction. A connector is arranged on a lower side of the recessed portion to cover the hole portion. An adhesive is arranged between the connector and the recessed portion. A minimum value of a gap distance between an outer end of the connector and an inner end of the recessed portion in a radial direction in which the outer end of the connector and the inner end of the recessed portion are opposed to each other with the adhesive therebetween is greater than a minimum value of a gap distance between an upper surface of the connector and the recessed portion loop-shaped surface in the vertical direction, in which the upper surface of the connector and the recessed portion loop-shaped surface are opposed to each other with the adhesive therebetween.

IPC Classes  ?

  • G11B 33/14 - Reducing influence of physical parameters, e.g. temperature change, moisture, dust
  • G11B 25/04 - Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing using flat record carriers, e.g. disc, card
  • G11B 33/02 - Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
  • G11B 33/12 - Disposition of constructional parts in the apparatus, e.g. of power supply, of modules

24.

Memory die temperature adjustment based on aging condition

      
Application Number 15876330
Grant Number 10289343
Status In Force
Filing Date 2018-01-22
First Publication Date 2018-05-24
Grant Date 2019-05-14
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor
  • Yadav, Preeti
  • Rao, Prasanna Desai Sudhir
  • Aggarwal, Smita
  • Lee, Dana

Abstract

A device includes a memory device and a controller. The controller is coupled to the memory device. The controller is configured to, in response to receiving a request to perform a memory access at the memory device, determine that the memory device has a characteristic indicative of a temperature crossing. The controller is also configured to, in response to the determination, increase a temperature of the memory device by performing memory operations on the memory device until detecting a condition related to the temperature.

IPC Classes  ?

  • G11C 7/04 - Arrangements for writing information into, or reading information out from, a digital store with means for avoiding disturbances due to temperature effects
  • G06F 3/06 - Digital input from, or digital output to, record carriers
  • G11C 16/26 - Sensing or reading circuits; Data output circuits
  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention

25.

Systems and methods for applying electric fields during ultraviolet exposure of lubricant layers for hard disk media

      
Application Number 14147739
Grant Number 09953665
Status In Force
Filing Date 2014-01-06
First Publication Date 2018-04-24
Grant Date 2018-04-24
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor
  • Sakane, Yasuo
  • Tani, Hiroshi

Abstract

Systems and methods for applying electric fields during ultraviolet exposure of lubricant layers for hard disk media. One such method involves inserting a magnetic medium into a chamber, the magnetic medium including a lubricant on an outer surface thereof, and applying an electric field and an ultraviolet radiation to the lubricant within the chamber. Another such method involves inserting a magnetic medium into a chamber, depositing a lubricant on the medium within the chamber, and applying an electric field and an ultraviolet radiation to the lubricant within the chamber.

IPC Classes  ?

  • G11B 5/40 - Protective measures on heads, e.g. against excessive temperature
  • C23C 16/00 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition (CVD) processes
  • C23C 16/458 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition (CVD) processes characterised by the method of coating characterised by the method used for supporting substrates in the reaction chamber

26.

Base unit and disk drive apparatus

      
Application Number 15783128
Grant Number 10068622
Status In Force
Filing Date 2017-10-13
First Publication Date 2018-02-22
Grant Date 2018-09-04
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor
  • Akagi, Masahiro
  • Ohiro, Takeshi
  • Yoneda, Tomohiro
  • Yudate, Akihiro
  • Ishino, Takayuki
  • Nakamura, Sho

Abstract

A base member includes a recessed portion arranged to extend in radial directions and recessed upward from a lower surface of the base member, the radial directions being directions perpendicular to a vertical direction; and a hole portion arranged to pass through the recessed portion in the vertical direction. The recessed portion includes a recessed portion loop-shaped surface being a loop-shaped surface perpendicular to the vertical direction. A connector is arranged on a lower side of the recessed portion to cover the hole portion. An adhesive is arranged between the connector and the recessed portion. A minimum value of a gap distance between an outer end of the connector and an inner end of the recessed portion in a radial direction in which the outer end of the connector and the inner end of the recessed portion are opposed to each other with the adhesive therebetween is greater than a minimum value of a gap distance between an upper surface of the connector and the recessed portion loop-shaped surface in the vertical direction, in which the upper surface of the connector and the recessed portion loop-shaped surface are opposed to each other with the adhesive therebetween.

IPC Classes  ?

  • G11B 33/14 - Reducing influence of physical parameters, e.g. temperature change, moisture, dust
  • G11B 33/02 - Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
  • G11B 33/12 - Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
  • G11B 25/04 - Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing using flat record carriers, e.g. disc, card

27.

Base unit and disk drive apparatus

      
Application Number 15376797
Grant Number 09886984
Status In Force
Filing Date 2016-12-13
First Publication Date 2017-06-29
Grant Date 2018-02-06
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor
  • Akagi, Masahiro
  • Ohiro, Takeshi
  • Yoneda, Tomohiro
  • Yudate, Akihiro
  • Ishino, Takayuki
  • Nakamura, Sho

Abstract

A base member includes a recessed portion arranged to extend in radial directions and recessed upward from a lower surface of the base member, the radial directions being directions perpendicular to a vertical direction or directions parallel to these directions; and a hole portion arranged to pass through the recessed portion in the vertical direction. The recessed portion includes a recessed portion loop-shaped surface being a loop-shaped surface perpendicular to the vertical direction. A connector is arranged on a lower side of the recessed portion to cover the hole portion. An adhesive is arranged between the connector and the recessed portion. A minimum value of a gap distance between an outer end of the connector and an inner end of the recessed portion in a radial direction in which the outer end of the connector and the inner end of the recessed portion are opposed to each other with the adhesive therebetween is greater than a minimum value of a gap distance between an upper surface of the connector and the recessed portion loop-shaped surface in the vertical direction, in which the upper surface of the connector and the recessed portion loop-shaped surface are opposed to each other with the adhesive therebetween.

IPC Classes  ?

  • G11B 33/14 - Reducing influence of physical parameters, e.g. temperature change, moisture, dust
  • G11B 33/02 - Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
  • G11B 33/12 - Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
  • G11B 25/04 - Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing using flat record carriers, e.g. disc, card

28.

Device and method to store predicted data at a host memory

      
Application Number 14330710
Grant Number 10824335
Status In Force
Filing Date 2014-07-14
First Publication Date 2016-01-14
Grant Date 2020-11-03
Owner WESTERN DIGITAL TECHNOLOGIES, Inc. (USA)
Inventor
  • Rostoker, Tal
  • Marcu, Alon
  • Sela, Rotem

Abstract

A data storage device may be configured to direct access to at least a portion of a host memory of a host device. For example, the data storage device may store data at the host memory, such as data predicted to be subject to a read request from the host device. When the data storage device receives a read request from the host device to read the data, the data storage device may send an indication to the host device to enable the host device to read the data directly from the host memory.

IPC Classes  ?

  • G06F 3/06 - Digital input from, or digital output to, record carriers
  • G06F 12/02 - Addressing or allocation; Relocation

29.

Wireless power transmission apparatus

      
Application Number 13357759
Grant Number 09312700
Status In Force
Filing Date 2012-01-25
First Publication Date 2013-07-04
Grant Date 2016-04-12
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor
  • Jung, Chun-Kil
  • Shon, Soo-Dong

Abstract

Provided is a wireless power transmission apparatus for wirelessly transmitting the power to portable electronic appliances using power or batteries charging power and supplying operation power to the portable electronic appliances. The wireless power transmission apparatus includes first and second source resonators, which are included inside a plurality of resonator bodies and which generates and wirelessly transmits the resonant power to a target resonator. The resonator bodies are formed to be folded to each other on an axis of a hinge.

IPC Classes  ?

  • H02J 17/00 - Systems for supplying or distributing electric power by electromagnetic waves
  • H02J 5/00 - Circuit arrangements for transfer of electric power between ac networks and dc networks
  • H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
  • H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

30.

Storing parity information for data recovery

      
Application Number 10925825
Grant Number 07516354
Status In Force
Filing Date 2004-08-25
First Publication Date 2006-03-02
Grant Date 2009-04-07
Owner WESTERN DIGITAL TECHNOLOGIES, INC. (USA)
Inventor
  • Nguyen, Lu
  • Cherian, Neena A.

Abstract

Provided is a method in which data is received at the first storage unit. A first information unit, a second information unit, and a third information unit are generated, wherein the first information unit, the second information unit, and the third information unit each include a portion of the received data and computed parity data. The first information unit is stored in the first storage unit at the first site. The second information unit is distributed to the second storage unit at the second site for storage. The third information unit is distributed to the third storage unit at the third site for storage.

IPC Classes  ?

  • G06F 11/00 - Error detection; Error correction; Monitoring
  • G06F 11/10 - Adding special bits or symbols to the coded information, e.g. parity check, casting out nines or elevens