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    • 7. 发明授权
    • Bit line resistance compensation
    • 位线电阻补偿
    • US08908432B2
    • 2014-12-09
    • US13755905
    • 2013-01-31
    • Sandisk Technologies, Inc.
    • Teruhiko KameiSeungpil LeeSiu Lung ChanKwang Ho KimMan Lung Mui
    • G11C16/04G11C16/28
    • G11C16/28
    • Methods for compensating for variations in bit line resistance during sensing of memory cells are described. The variations in bit line resistance may occur die-to-die or plane-to-plane on the same die. In some embodiments, for each die or memory plane on a die, a plurality of bit line read voltages associated with a plurality of zones may be determined based on sensing criteria such as a number of fail bits. Each zone of the plurality of zones may be associated with a memory array region within a memory plane. Within each zone, different bit line read voltages may be applied to different bit line groupings in order to compensate for systematic variations in bit line resistance between neighboring bit lines due to the use of multiple patterning lithography techniques such as spacer-based double patterning.
    • 描述了用于补偿存储器单元感测期间位线电阻变化的方法。 位线电阻的变化可能会在同一芯片上面对芯片或平面到平面。 在一些实施例中,对于管芯上的每个管芯或存储器平面,可以基于诸如故障位数的感测标准来确定与多个区域相关联的多个位线读取电压。 多个区域中的每个区域可以与存储器平面内的存储器阵列区域相关联。 在每个区域内,可以将不同的位线读取电压施加到不同的位线分组,以便补偿相邻位线之间的位线电阻的系统变化,这是由于使用诸如基于间隔物的双重图案化的多重图案化光刻技术。