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Imprint recovery for memory cells

A memory unit and memory technology, applied in static memory, digital memory information, information storage, etc., can solve problems such as lost state

Inactive Publication Date: 2021-04-09
MICRON TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Volatile memory devices such as DRAM can lose their stored state when disconnected from an external power source

Method used

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  • Imprint recovery for memory cells
  • Imprint recovery for memory cells
  • Imprint recovery for memory cells

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Experimental program
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Embodiment Construction

[0024] Memory devices may experience various conditions when used as part of electronic devices such as mobile devices, personal computers, wireless communication devices, servers, Internet of Things (IoT) devices, vehicles or vehicle components. In some cases, one or more memory cells of a memory device may be embossed, which may refer to where a memory cell of a memory device tends to store one logic state rather than another, is less likely to be written to a different logic state (e.g., a different logical state than that stored prior to the write operation) or various conditions in which both cases exist. The likelihood of a memory cell being imprinted with a logic state may be related to the length of uninterrupted (eg, continuous) time the logic state is stored, the temperature of the memory cell while the logic state is being stored, or other factors.

[0025] In one example, a memory device may be subjected to imprinting due to exposure to high temperatures for a sust...

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Abstract

Methods, systems, and devices for imprint recovery for memory cells are described. In some cases, memory cells may become imprinted, which may refer to conditions where a cell becomes predisposed toward storing one logic state over another, resistant to being written to a different logic state, or both. Imprinted memory cells may be recovered using a recovery or repair process that may be initiated according to various conditions, detections, or inferences. In some examples, a system may be configured to perform imprint recovery operations that are scaled or selected according to a characterized severity of imprint, an operational mode, environmental conditions, and other factors. Imprint management techniques may increase the robustness, accuracy, or efficiency with which a memory system, or components thereof, can operate in the presence of conditions associated with memory cell imprinting.

Description

[0001] cross reference [0002] This patent application claims priority to U.S. Patent Application Serial No. 16 / 580,972, filed September 24, 2019, by Harms et al., entitled "IMPRINT RECOVERY FOR MEMORY CELLS," This application is assigned to the present assignee and is expressly incorporated herein by reference in its entirety. technical field [0003] The technical field relates to footprint management for memory systems. Background technique [0004] Memory devices are widely used to store information in various electronic devices such as computers, wireless communication devices, cameras, digital displays, and the like. Information is stored by programming different states of the memory device. For example, binary devices most often store one of two states typically represented by a logic 1 or a logic 0. In other arrangements, more than two states may be stored. In order to access the stored information, a component of the device may read or sense at least one store...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
CPCG06F11/1438G11C11/221G11C11/2273G11C11/2275G11C11/2293G11C11/2295G11C11/2297G11C7/04G11C2029/5004G11C29/028G11C29/021G11C29/70G11C29/4401G11C29/08G11C29/52G11C29/50016G11C29/50004G11C2029/0409G11C2029/0411G11C11/2259
Inventor J·D·哈姆斯J·J·斯特兰德S·S·巴苏塔S·B·拉克什曼
Owner MICRON TECH INC