Sandisk Technologies Assigned Twelve Patents

Making 3D memory device using composite hard masks for formation of deep via openings
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12245434) developed by Titus; Monica, Santa Clara, CA, Tirukkonda; Roshan Jayakhar, Milpitas, CA, Kanakamedala; Senaka, San Jose, CA, and Makala; Raghuveer S., Campbell, CA, for a “method of making a three-dimensional memory device using composite hard masks for formation of deep via openings.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “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.”

The patent application was filed on 2022-02-01 (17/590278).

3D memory device containing resonant tunneling barrier and high mobility channel and method of making
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12245425) developed by Rabkin; Peter, and Higashitani; Masaaki, Cupertino, CA, for “three dimensional memory device containing resonant tunneling barrier and high mobility channel and method of making thereof.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A three-dimensional memory device containing a plurality of levels of memory elements includes a memory film containing a layer stack that includes a resonant tunneling barrier stack, a semiconductor barrier layer, and a memory material layer located between the resonant tunneling barrier stack and the semiconductor barrier layer, a semiconductor channel, and a control gate electrode.”

The patent application was filed on 2022-02-16 (17/673137).

Low power read method and memory device capable thereof
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12243593) developed by Yang; Xiang, Santa Clara, CA, Dutta; Deepanshu, Fremont, CA, Kwon; Ohwon, Milpitas, CA, Kai; James, Fremont, CA, and Mizutani; Yuki, Milpitas, CA, for “low power read method and a memory device capable thereof.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The memory device includes a chip with circuitry, a plurality of memory blocks, and a plurality of bit lines. The memory blocks include an array of memory cells, and the circuitry either overlies or underlies the array of memory cells. The bit lines are divided into two portions that are electrically connected with one another via at least one transistor so that at least one portion of each bit line can be charged independently of the other portion of the same bit line.”

The patent application was filed on 2022-03-03 (17/685613).

Integrated circuit chip storage container
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12243793) developed by Tsur; Nadav, Bet Herut, Israel, and Sommer; Yair, Even Yehuda, Israel, for an “integrated circuit chip storage container.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “An integrated circuit (IC) device container/carrier includes a cartridge having a plurality of faces and a device housing slot recessed from one or more of the faces, where each slot is configured to house at least one IC device. The container further includes a lid rotatably coupled with the cartridge, the lid having a window recess configured to align with each device housing slot for accessing corresponding IC devices. At least one of the cartridge faces may be configured as a lock face without a corresponding device housing slot recessed from this lock face.”

The patent application was filed on 2022-05-20 (17/750026).

Data storage device management system
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12242378) developed by Muthiah; Ramanathan, and Venkataramanan; Balaji Thraksha, Bangalore, India, for a “data storage device management system.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Devices and techniques are disclosed wherein an end user can remotely trigger direct data management activities of a data storage device (DSD), such as creating a data snapshot, resetting a snapshot, and setting permissions at the DSD via a remote mobile device app interface.”

The patent application was filed on 2022-06-27 (17/850483).

Performance indicator on data storage device
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12242752) developed by Muthiah; Ramanathan, Bangalore, India, for a “performance indicator on a data storage device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A data storage device comprising a non-volatile storage medium configured to store user data, a data port configured to transmit data between a host computer system and the data storage device, a display system, and a controller. The controller is configured to receive and execute one or more commands from the host computer system to cause a data transfer between the host computer system and the storage medium of the data storage device. The controller generates performance data representing the performance of the data storage device, wherein the performance data includes an efficiency ratio value representing a relative utilization of an operational capability of the data storage device in conducting the data transfer. The controller generates one or more control signals to cause the display system to visually indicate at least the efficiency ratio value of the performance data.”

The patent application was filed on 2022-06-29 (17/853589).

Storage system and method for proactive die retirement by fatal wordline leakage detection
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12243605) developed by Tian; Xuan, Li; Liang, Yi; Dandan, Xing; Jojo, Yin; Vincent, Sun; Yongke, Shanghai, China, and Bennett; Alan, Edinburgh, Great Britain, for “storage system and method for proactive die retirement by fatal wordline leakage detection.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “In some situations, a leak on a wordline may be a localized problem that causes data loss in a block that contains the wordline. In other situations, such as when the leak occurs near a peripheral wordline routing area, the leak can affect the entire memory die. The storage system provided herein has a fatal wordline leak detector that determines the type of leak and, accordingly, whether just the block should be retired or whether related blocks should be retired.”

The patent application was filed on 2022-07-01 (17/856073).

Automatic data erase from data storage device
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12242754) developed by Hamo; Eyal, Naharia, Israel, Taragan; Sagi, Ramat Ishay, Israel, and Lemberg; Alexander, Netanya, Israel, for an “automatic data erase from data storage device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “IA data storage device comprising a non-volatile storage medium configured to store user data, a data port configured to receive and transmit data between a host computer system and the data storage device, and a controller. The controller is configured to receive, via the data port, a write command comprising a read restriction indication, receive, via the data port, data and write the data to an address of the non-volatile storage medium. The controller is further configured to determine an occurrence of a read restriction event, and in response to the occurrence of the read restriction event and in response to the read restriction indication, erase the data from the address of the non-volatile storage medium.”

The patent application was filed on 2022-06-29 (17/852363).

In-place write techniques without erase in memory device
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12243591) developed by Yang; Xiang, Santa Clara, CA, Guo; Jiacen, Cupertino, CA, and Inoue; Takayuki, Fujisawa, Japan, for “in-place write techniques without erase in a memory device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The memory device includes a plurality of memory blocks, each including a plurality of memory cells arranged in a plurality of word lines. Control circuitry is in communication with the plurality of memory blocks. In operation, the control circuitry receives a data write instruction and programs the memory cells of the memory blocks to a one bit per memory cell (SLC) format. In response to the data programmed to the memory cells of the memory blocks in the SLC format reaching an SLC limit prior to completion of the data write instruction, without erasing the memory cells programmed to the SLC format, the control circuitry programs the memory cells of at least some of the plurality of memory blocks from the SLC format to a two bits per memory cell (MLC) format.”

The patent application was filed on 2022-08-26 (17/896587).

Storage device and method for host-assisted efficient handling of multiple versions of data
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12242751) developed by Agarwal; Dinesh Kumar, Bangalore, India, and Sharma; Amit, Bengaluru, India, for “data storage device and method for host-assisted efficient handling of multiple versions of data.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A data storage device and method for host-assisted efficient handling of multiple versions of data are provided. In one embodiment, a data storage device is provided comprising a memory and a controller. The controller is configured to receive, from a host, identification of different versions of data that are to deleted together, store the different versions of the data in areas of the memory that are erasable in parallel; receive, from the host, a command to erase the different versions of the data; and erase the different versions of the data in parallel. Other embodiments are provided.”

The patent application was filed on 2023-07-18 (18/223133).

Storage device and method for hiding tweak generation latency
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12242740) developed by Branstad; Mark, Rochester, MN, Lueker-Boden; Martin, Fremont, CA, and Zhang; Lunkai, Portland, OR, for “data storage device and method for hiding tweak generation latency.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A data storage device has a controller, a decryption engine, and a memory storing encrypted data. Instead of using the decryption engine to generate a tweak value needed to decrypt the encrypted data, the tweak value is generated by the controller while the controller is waiting for the encrypted data to be read from the memory. This hides the latency to compute the tweak value in the latency to read the encrypted data from the memory.”

The patent application was filed on 2023-07-19 (18/223662).

Storage device and method for accident-mode storage of vehicle information
Sandisk Technologies, Inc., Milpitas, CA, has been assigned a patent (12242737) developed by Cohen; Nisiel, Rosh Haain, Israel, Kahlon; Orel, Netanya,Israel, Jazcilevich; Roi, Givatayim, Israel, and Bleyer; Aki, Even Yehuda, Israel, for “data storage device and method for accident-mode storage of vehicle information.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A data storage device and method for accident-mode storage of vehicle information are disclosed. In one embodiment, a data storage device is provided comprising a memory and one or more processors. The memory comprises single-level cell (SLC) memory and multi-level cell (MLC) memory. The one or more processors, individually or in combination, are configured to: receive a command from a vehicle to enter accident mode; and in response to receiving the command from the vehicle to enter accident mode, relocate vehicle information stored in the MLC memory to the SLC memory. Other embodiments are disclosed.”

The patent application was filed on 2024-02-07 (18/434976).