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1. 发明授权

US08386883B2 Lengthening life of a limited life memory 有权
标题翻译：延长生命有限的生活记忆
公开(公告)号：US08386883B2
公开(公告)日：2013-02-26
申请号：US12391547
申请日：2009-02-24
申请人： Michele Franceschini , John Peter Karidis , Luis A Lastras-Montano , Thomas Mittelholzer , Mark N Wegman
发明人： Michele Franceschini , John Peter Karidis , Luis A Lastras-Montano , Thomas Mittelholzer , Mark N Wegman
IPC分类号： G11C29/00 , H01L29/04 , H01L29/10 , H01L31/036 , H01L31/00 , H01L21/70
CPC分类号： G11C13/0069 , G06F11/1012 , G11C13/0002 , G11C2207/104
摘要： A phase-change memory (PCM) includes a matrix of storage cells, including at least a first group with at least one cell. Each cell includes a phase change material having at least a first resistance value and a second resistance value, such that the first group can have an identical message encoded therein in at least a first way and a second way. The memory also includes a controller configured to encode the identical message in the at least first group the first or second way, based on which way causes the least amount of writing cost, given current levels of the group. Another embodiment of memory includes a matrix of storage cells, including at least a first group with at least one cell. Each of the storage cells has at least two levels, such that each of the storage cells can have an identical message encoded therein in at least a first way and a second way (the cells can be PCM or another technology). Each one of the storage cells is arbitrarily individually changeable among the at least two levels, and each of the cells is cost-asymmetric. A controller encodes the identical message in the at least first group using the first way or the second way, based on which way incurs a least cost when writing the message into the at least one cell of the at least first group, given current levels of the at least first group.
摘要翻译：相变存储器（PCM）包括存储单元矩阵，至少包括具有至少一个单元的第一组。每个单元包括具有至少第一电阻值和第二电阻值的相变材料，使得第一组可以以至少第一种方式和第二种方式在其中编码相同的消息。所述存储器还包括控制器，所述控制器被配置为在所述至少第一组中对所述第一或第二方式的相同消息进行编码，基于哪种方式，给出所述组的当前级别的最小写入成本量。存储器的另一实施例包括存储单元的矩阵，包括至少一个具有至少一个单元的第一组。每个存储单元具有至少两个级别，使得每个存储单元可以以至少第一种方式和第二种方式在其中编码相同的消息（该单元可以是PCM或另一种技术）。存储单元中的每一个在至少两个级别中可任意地单独变化，并且每个单元是成本不对称的。控制器使用第一种方法或第二种方式在至少第一组中编码相同的消息，基于哪种方式在将消息写入至少第一组的至少一个小区时产生最低成本，给定当前级别至少第一组。

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