Patent ID: 8699289
Filing Date: 2014-04-15
Classification: G11C

Abstract:
1. A method for performing disturbance recovery in a semiconductor memory device having a plurality of memory cells, the method comprising: performing a first read operation on a selected memory cell coupled to a selected word line; storing a data state detected in the selected memory cell in a local data sense amplifier coupled to the selected memory cell; transferring the data state detected in the selected memory cell from the local data sense amplifier to a global data sense amplifier; performing a second read operation on a previously unselected memory cell coupled to a previously unselected word line; storing a data state detected in the previously unselected memory cell in the local data sense amplifier coupled to the previously unselected memory cell; performing a write operation on the previously unselected memory cell, wherein the detected data state is written back to the previously unselected memory cell from the local data sense amplifier; transferring the data state detected in the selected memory cell from the global data sense amplifier back to the local data sense amplifier; and performing a write operation on the selected memory cell, wherein the detected data state is written back to the selected memory cell from the local data sense amplifier.