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1. 发明授权

US09626289B2 Metalblock relinking to physical blocks of semiconductor memory in adaptive wear leveling based on health 有权
公开(公告)号：US09626289B2
公开(公告)日：2017-04-18
申请号：US14471465
申请日：2014-08-28
申请人： SanDisk Technologies Inc.
发明人： Lei Chen , Xinde Hu , Zhenlei Shen , Yiwei Song , Gautam Dusija
IPC分类号： G06F12/00 , G06F12/02
CPC分类号： G06F12/0246 , G06F12/0253 , G06F2212/1016 , G06F2212/7205 , G06F2212/7208 , G06F2212/7211
摘要： Systems and methods for metablock relinking may be provided. A first physical block of a first metablock may be determined to have a different health than a second physical block of a second metablock based on health indicators of the first and second physical blocks. Each of the health indicators may indicate an extent to which a respective one of the first and second physical blocks may be written to and/or erased before the respective one of the first and second physical blocks becomes defective. The first physical block of the first metablock may be replaced with the second physical block of the second metablock based on a determination that the health of the first physical block of the first metablock is different than the health of the second physical block of the second metablock.

2. 发明申请

US20160062881A1 METABLOCK RELINKING SCHEME IN ADAPTIVE WEAR LEVELING 有权
标题翻译：基于自适应磨耗的METABLOCK关联方案
公开(公告)号：US20160062881A1
公开(公告)日：2016-03-03
申请号：US14471465
申请日：2014-08-28
申请人： SanDisk Technologies Inc.
发明人： Lei Chen , Xinde Hu , Zhenlei Shen , Yiwei Song , Gautam Dusija
IPC分类号： G06F12/02
CPC分类号： G06F12/0246 , G06F12/0253 , G06F2212/1016 , G06F2212/7205 , G06F2212/7208 , G06F2212/7211
摘要： Systems and methods for metablock relinking may be provided. A first physical block of a first metablock may be determined to have a different health than a second physical block of a second metablock based on health indicators of the first and second physical blocks. Each of the health indicators may indicate an extent to which a respective one of the first and second physical blocks may be written to and/or erased before the respective one of the first and second physical blocks becomes defective. The first physical block of the first metablock may be replaced with the second physical block of the second metablock based on a determination that the health of the first physical block of the first metablock is different than the health of the second physical block of the second metablock.
摘要翻译：可以提供用于代表复位的系统和方法。基于第一和第二物理块的健康指示符，可以确定第一元区块的第一物理块具有与第二元区块的第二物理块不同的健康。每个健康指示符可以指示在第一和第二物理块中的相应一个变得有缺陷之前第一和第二物理块中的相应一个可被写入和/或擦除的程度。基于第一元区块的第一物理块的健康状况不同于第二元区块的第二物理块的健康状况的确定，第一元区块的第一物理块可以被第二元区块的第二物理块替换。

3. 发明申请

US20170084345A1 NON-VOLATILE MEMORY WITH SUPPLEMENTAL SELECT GATES 有权
公开(公告)号：US20170084345A1
公开(公告)日：2017-03-23
申请号：US14860224
申请日：2015-09-21
申请人： SANDISK TECHNOLOGIES INC.
发明人： Nian Niles Yang , Jim Fitzpatrick , Yiwei Song
IPC分类号： G11C16/34 , G11C16/26 , G11C16/04 , G11C16/14
CPC分类号： G11C16/34 , G11C16/0483 , G11C16/08 , G11C16/14 , G11C16/26 , G11C16/3459 , G11C29/02 , G11C29/024
摘要： A non-volatile memory system includes a plurality of groups of connected non-volatile memory cells (e.g., charge trapping memory cells), a select line, and a plurality of select gates connected to the select line. Each select gate is connected at an end (e.g. source end or drain side) of one of the groups of memory cells. The system includes one or more control circuits that are configured to determine whether the select gates are abnormal. If a select gate is determined to be abnormal, then one of the memory cells connected to the select gate is converted to operate as a select gate. The system will then perform memory operations by operating the converted memory cell as a select gate.

4. 发明申请

US20160188401A1 System and Method for Utilizing History Information in a Memory Device 审中-公开
标题翻译：利用历史信息在存储器件中的系统和方法
公开(公告)号：US20160188401A1
公开(公告)日：2016-06-30
申请号：US14584825
申请日：2014-12-29
申请人： SanDisk Technologies Inc.
发明人： Zhenlei Shen , Xinde Hu , Lei Chen , Yiwei Song
IPC分类号： G06F11/07
CPC分类号： G06F11/0751 , G06F11/0703 , G06F11/073
摘要： Systems and methods for controlling blocks in a memory device using a health indicator (such as the failed bit count) for the blocks are disclosed. However, the health indicator may exhibit noise, thereby resulting in an unreliable indicator of the health of the blocks in the memory device. In order to filter out the noise, a rolling average of the health indicator may be determined, and compared to the current health indicator. The comparison with the rolling average may indicate whether the current health indicator is an outlier, and thus should not be used. The health indicator may also be used to predict a future health indicator for different blocks in the memory device. Using the predicted future health indicator, the use of the blocks may be changed in order to more evenly wear the blocks.
摘要翻译：公开了用于使用健康指示器（诸如故障位计数）来控制块的存储器件中的块的系统和方法。然而，健康指示器可能表现出噪音，从而导致存储器装置中块的健康状况的不可靠指示。为了滤除噪声，可以确定健康指标的滚动平均值，并与当前健康指标进行比较。与滚动平均值的比较可以指示当前健康指标是否是离群值，因此不应该使用。健康指示器还可以用于预测存储器设备中不同块的未来健康指示符。使用预测的未来健康指示器，可以改变块的使用以便更均匀地佩戴块。

5. 发明申请

US20160098215A1 Method and System for Adaptively Assigning Logical Block Address Read Counters Using a Tree Structure 有权
标题翻译：使用树结构自适应地分配逻辑块地址读取计数器的方法和系统
公开(公告)号：US20160098215A1
公开(公告)日：2016-04-07
申请号：US14506147
申请日：2014-10-03
申请人： SanDisk Technologies, Inc.
发明人： Yiwei Song , Xinde Hu , Daniel Tuers
IPC分类号： G06F3/06
CPC分类号： G06F3/0619 , G06F3/064 , G06F3/0653 , G06F3/0679 , G06F12/0246 , G06F12/0646 , G06F2212/7201 , G06F2212/7202 , G06F2212/7206 , G06F2212/7207
摘要： Systems, apparatuses, and methods are provided that dynamically reassign counters (or other memory monitors) in a memory. A plurality of counters may be assigned to different address ranges within an overall address range of a memory. The value of the counter may be indicative of activity, such as reads, within a respective assigned address range. Depending on the value of the counter, the respective address range of the counter may be dynamically changed. For example, a counter with a high value (indicating higher activity within the address range) may have its respective address range divided, with two counters being assigned to each of the divided address ranges. Likewise, counters with low values (indicating less activity within the address ranges) may have their respective address ranges combined, with a single counter being assigned to the combined address ranges. Thus, in subdividing and combining address ranges, the number of counters assigned may remain the same, while still monitoring the activity with the overall address range.
摘要翻译：提供了在存储器中动态重新分配计数器（或其他存储器监视器）的系统，装置和方法。可以将多个计数器分配给存储器的整个地址范围内的不同地址范围。计数器的值可以指示在相应的分配的地址范围内的活动，例如读取。根据计数器的值，可以动态地改变计数器的相应地址范围。例如，具有高值的计数器（指示地址范围内的更高的活动度）可以将其各自的地址范围划分，其中两个计数器被分配给每个划分的地址范围。类似地，具有低值的计数器（在地址范围内指示较少的活动）可以具有其各自的地址范围的组合，其中单个计数器被分配给组合的地址范围。因此，在细分和组合地址范围时，分配的计数器数量可能保持不变，同时仍然以整体地址范围监视活动。

6. 发明授权

US10108471B2 System and method for utilizing history information in a memory device 有权
公开(公告)号：US10108471B2
公开(公告)日：2018-10-23
申请号：US14584825
申请日：2014-12-29
申请人： SanDisk Technologies Inc.
发明人： Zhenlei Shen , Xinde Hu , Lei Chen , Yiwei Song
IPC分类号： G06F11/00 , G06F11/07
摘要： Systems and methods for controlling blocks in a memory device using a health indicator (such as the failed bit count) for the blocks are disclosed. However, the health indicator may exhibit noise, thereby resulting in an unreliable indicator of the health of the blocks in the memory device. In order to filter out the noise, a rolling average of the health indicator may be determined, and compared to the current health indicator. The comparison with the rolling average may indicate whether the current health indicator is an outlier, and thus should not be used. The health indicator may also be used to predict a future health indicator for different blocks in the memory device. Using the predicted future health indicator, the use of the blocks may be changed in order to more evenly wear the blocks.

7. 发明授权

US09715938B2 Non-volatile memory with supplemental select gates 有权
公开(公告)号：US09715938B2
公开(公告)日：2017-07-25
申请号：US14860224
申请日：2015-09-21
申请人： SANDISK TECHNOLOGIES INC.
发明人： Nian Niles Yang , Jim Fitzpatrick , Yiwei Song
IPC分类号： G11C16/34 , G11C16/26 , G11C16/04 , G11C16/14
CPC分类号： G11C16/34 , G11C16/0483 , G11C16/08 , G11C16/14 , G11C16/26 , G11C16/3459 , G11C29/02 , G11C29/024
摘要： A non-volatile memory system includes a plurality of groups of connected non-volatile memory cells (e.g., charge trapping memory cells), a select line, and a plurality of select gates connected to the select line. Each select gate is connected at an end (e.g. source end or drain side) of one of the groups of memory cells. The system includes one or more control circuits that are configured to determine whether the select gates are abnormal. If a select gate is determined to be abnormal, then one of the memory cells connected to the select gate is converted to operate as a select gate. The system will then perform memory operations by operating the converted memory cell as a select gate.

8. 发明授权

US09423971B2 Method and system for adaptively assigning logical block address read counters using a tree structure 有权
标题翻译：使用树结构自适应地分配逻辑块地址读取计数器的方法和系统
公开(公告)号：US09423971B2
公开(公告)日：2016-08-23
申请号：US14506147
申请日：2014-10-03
申请人： SanDisk Technologies, Inc.
发明人： Yiwei Song , Xinde Hu , Daniel Tuers
IPC分类号： G06F3/06 , G06F12/06
CPC分类号： G06F3/0619 , G06F3/064 , G06F3/0653 , G06F3/0679 , G06F12/0246 , G06F12/0646 , G06F2212/7201 , G06F2212/7202 , G06F2212/7206 , G06F2212/7207
摘要： Systems, apparatuses, and methods are provided that dynamically reassign counters (or other memory monitors) in a memory. A plurality of counters may be assigned to different address ranges within an overall address range of a memory. The value of the counter may be indicative of activity, such as reads, within a respective assigned address range. Depending on the value of the counter, the respective address range of the counter may be dynamically changed. For example, a counter with a high value (indicating higher activity within the address range) may have its respective address range divided, with two counters being assigned to each of the divided address ranges. Likewise, counters with low values (indicating less activity within the address ranges) may have their respective address ranges combined, with a single counter being assigned to the combined address ranges. Thus, in subdividing and combining address ranges, the number of counters assigned may remain the same, while still monitoring the activity with the overall address range.
摘要翻译：提供了在存储器中动态重新分配计数器（或其他存储器监视器）的系统，装置和方法。可以将多个计数器分配给存储器的整个地址范围内的不同地址范围。计数器的值可以指示在相应的分配的地址范围内的活动，例如读取。根据计数器的值，可以动态地改变计数器的相应地址范围。例如，具有高值的计数器（指示地址范围内的更高的活动度）可以将其各自的地址范围划分，其中两个计数器被分配给每个划分的地址范围。类似地，具有低值的计数器（在地址范围内指示较少的活动）可以具有其各自的地址范围的组合，其中单个计数器被分配给组合的地址范围。因此，在细分和组合地址范围时，分配的计数器数量可能保持不变，同时仍然以整体地址范围监视活动。

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