Patent classifications
G11C16/107
Determining threshold values for voltage distribution metrics
Systems and methods are disclosed including a memory device and a processing device operatively coupled to the memory device. The processing device can perform operations including determining a value of a data state metric associated with data stored in a part of a block of the memory device; responsive to determining that the value of the data state metric satisfies a first threshold criterion, determining a first value reflecting a voltage distribution metric associated with at least the part of the block; determining a second value reflecting at least one of a deterioration slope indicative of a data deterioration rate associated with a first portion of the memory device or an error rate associated with a second portion of the memory device; feeding the first value and the second value to a neural network; and receiving, from the neural network, an instruction to perform a media management operation.
NON-VOLATILE MEMORY WITH CONCURRENT SUB-BLOCK PROGRAMMING
A non-volatile memory system includes a control circuit connected to non-volatile memory cells. The control circuit is configured to concurrently program memory cells connected to different word lines that are in different sub-blocks of different blocks in different planes of a die.
ADJUSTING A PREPROGRAM VOLTAGE BASED ON USE OF A MEMORY DEVICE
A method is described that includes determining a number of program and erase cycles associated with a block of pages of a memory device and determining a preprogram voltage based on the number of program and erase cycles to apply to the block of pages prior to an erase operation. The method further includes applying the preprogram voltage to the block of pages and performing an erase operation on the block of pages following application of the preprogram voltage to the block of pages.
DETERMINING THRESHOLD VALUES FOR VOLTAGE DISTRIBUTION METRICS
Systems and methods are disclosed including a memory device and a processing device operatively coupled to the memory device. The processing device can perform operations including determining a value of a data state metric associated with data stored in a part of a block of the memory device; responsive to determining that the value of the data state metric satisfies a first threshold criterion, determining a first value reflecting a voltage distribution metric associated with at least the part of the block; determining a second value reflecting at least one of a deterioration slope indicative of a data deterioration rate associated with a first portion of the memory device or an error rate associated with a second portion of the memory device; feeding the first value and the second value to a neural network; and receiving, from the neural network, an instruction to perform a media management operation.
Memory controller, memory device and storage device
A memory controller includes an interface and a control module. The interface interfaces with a memory device which includes a plurality of dies that each include a plurality of blocks. The control module groups a plurality of blocks included in different dies and manages the plurality of blocks as a super block. The control module performs scheduling to alternately perform a program on a part of an Nth super block, wherein N is a natural number, and a phased erase on an N+1st super block, and the control module completes the program on the Nth super block and the erase on the Nth super block before the program on the N+1st super block starts.
Fast interval read setup for 3D NAND flash
A memory having a plurality of blocks is coupled with control circuits having logic to execute a read setup operation, the read setup operation comprising simultaneously applying a read setup bias to a plurality of memory cells of a selected block of the plurality of blocks. Logic to traverse the blocks in the plurality of blocks can apply the read setup operation to the plurality of blocks. The blocks in the plurality of blocks can include respectively a plurality of sub-blocks, The read setup operation can traverse sub-blocks in a block to simultaneously apply the read setup bias to more than one individual sub-block of the selected block. A block status table can be used to identify stale blocks for the read setup operation. Also, the blocks can be traversed as a background operation independent of read commands addressing the blocks.
ULTRA-PRECISE TUNING OF NEURAL MEMORY CELLS
Examples for ultra-precise tuning of a selected memory cell are disclosed. In one example, a method of programming a first memory cell in a neural memory to a target value is disclosed, the method comprising programming a second memory cell by applying programming voltages to terminals of the second memory cell; and determining if an output of the first memory cell has reached the target value.
Adjusting a preprogram voltage based on use of a memory device
A method is described that includes determining a number of program and erase cycles associated with a block of pages of a memory device and determining a preprogram voltage based on the number of program and erase cycles to apply to the block of pages prior to an erase operation. The method further includes applying the preprogram voltage to the block of pages and performing an erase operation on the block of pages following application of the preprogram voltage to the block of pages.
MEMORY SYSTEM
According to one embodiment, a memory system includes a semiconductor memory and a controller. The semiconductor memory includes blocks each containing memory cells. The controller is configured to instruct the semiconductor memory to execute a first operation and a second operation. In the first operation and the second operation, the semiconductor memory selects at least one of the blocks, and applies at least one voltage to all memory cells contained in said selected blocks. A number of blocks to which said voltage is applied per unit time in the second operation is larger than that in the first operation.
High-voltage shifter with reduced transistor degradation
Discussed herein are systems and methods for protecting against transistor degradation in a high-voltage (HV) shifter to transfer an input voltage to an access line, such as a global wordline. An embodiment of a memory device comprises memory cells and a HV shifter circuit that includes a signal transfer circuit, and first and second HV control circuits. The signal transfer circuit includes a P-channel transistor to transfer a high-voltage input to an access line. The first HV control circuit couples a bias voltage to the P-channel transistor for a first time period, and the second HV control circuit couples a stress-relief signal to the P-channel transistor for a second time period, after the first time period, to reduce degradation of the P-channel transistor. The transferred high voltage can be used to charge the access line to selectively read, program, or erase memory cells.