Enhanced MLC programming
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United States of America Patent
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Oct 10, 2017
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app pub date -
Apr 10, 2015
filing date -
Apr 10, 2015
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Abstract
Mechanisms or techniques for improving operations such as program or erase operations that are intended to set a state of one or more multi-level memory cells (MLC) to a selected or designated state. For example, a first voltage pulse can be applied to an MLC that is intended to set the MLC to a desired state. Thereafter, a sensing pulse can be applied to the MLC, and one or more suitable electrical characteristic (EC) such as resistance can be measured and reported. This measured EC can then be compared to thresholds that define the range of acceptable values for the EC in order for the MLC to be deemed to be in the selected state. If the measured EC is not within the suitable range threshold, then one or more additional voltage pulses can be applied in order to properly set the MLC to the designated state and these additional voltages pulses can have different characteristics than the first voltage pulse.
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