Patent ID: 8902647
Filing Date: 2014-12-02
Classification: G11C

Abstract:
1. A method of operating a three-dimensional nonvolatile memory formed in a plurality of physical levels of charge-trapping memory cells disposed above a substrate comprising: receiving a portion of data to be stored in the three-dimensional nonvolatile memory; determining whether the portion of data is likely to be affected by charge migration between charge-trapping memory cells; and if the portion of data is determined likely to be affected by charge migration between charge-trapping memory cells then storing a first copy of the portion of data along a first word line, storing a second copy of the portion of data along a second word line, and storing a third copy of the portion of data along a third word line, the first word line lying immediately above the second word line and the third word line lying immediately below the second word line, the first, second, and third copies of the portion of data aligned so that each memory cell along the second word line stores the same charge as a neighboring memory cell of the first word line above and the same charge as a neighboring memory cell of the third word line below.