Cell performance recovery using cycling techniques
AssigneeMicron Technology, Inc.
InventorsAlessandro Calderoni, Durai Vishak Nirmal Ramaswamy
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Abstract
Methods, systems, and devices for memory array operation are described. A series of pulses may be applied to a fatigued memory cell to improve performance of memory cell. For example, a ferroelectric memory cell may enter a fatigue state after a number of access operations are performed at an access rate. After the number of access operations have been performed at the access rate, a fatigue state of the ferroelectric memory cell may be identified and the series of pulses may be applied to the ferroelectric capacitor at a different (e.g., higher) rate. For instance, a delay between pulses of the series of pulses may be shorter than the delay between access operations of the ferroelectric memory cell.
Claims20
A method, comprising:
- applying a plurality of access pulses to a memory cell in an operation state;
- monitoring a remnant polarization of the memory cell based at least in part on applying the plurality of access pulses, wherein the remnant polarization corresponds to an amount of charge capable of being stored by the memory cell;
- and
- determining a first peak magnitude in the remnant polarization of the memory cell as a function of a number of the applied access pulses based at least in part on monitoring the remnant polarization of the memory cell.
A method of operating a memory array, comprising:
- applying a plurality of access pulses to a memory cell of the memory array;
- determining a first peak magnitude of a remnant polarization of the memory cell as a function of a number of the applied plurality of access pulses
- configuring a plurality of recovery pulses based at least in part on the first peak magnitude;
- applying the configured plurality of recovery pulses to the memory cell;
- determining a second peak magnitude of the remnant polarization of the memory cell;
- and
- terminating the application of the plurality of recovery pulses based at least in part on determining the second peak magnitude.
An electronic memory apparatus, comprising:
- a memory cell;
- and
- a controller in electronic communication with the memory cell, wherein the controller is operable to:
- apply a plurality of access pulses to the memory cell;
- determine a first peak magnitude of a remnant polarization of the memory cell;
- apply a plurality of recovery pulses to the memory cell based at least in part on the determined first peak magnitude;
- and
- terminate application of the plurality of recovery pulses based at least in part on a second peak magnitude of the remnant polarization of the memory cell.
Dependencies are inferred from the claim text.