摘要:
Some embodiments include memory arrays. The memory arrays can have global bitlines extending along a first horizontal direction, vertical local bitlines extending perpendicularly from the global bitlines, and wordlines extending along a second horizontal direction which is perpendicular to the first horizontal direction. The global bitlines may be subdivided into a first series at a first elevational level, and a second series at a second elevational level which is different from the first elevational level. The global bitlines of the first series can alternate with the global bitlines of the second series. There can be memory cell material directly between the wordlines and the vertical local bitlines. The memory cell material may form a plurality of memory cells uniquely addressed by wordline/global bitline combinations. Some embodiments include cross-point memory cell units that have areas of about 2F2.
摘要:
PROBLEM TO BE SOLVED: To provide a nonvolatile memory device which enables programming operation to be executed without physically erasing a nonvolatile memory cell, a programming method and an operating method thereof, and a memory system including the same.SOLUTION: A method of operating a nonvolatile memory device includes a step of successively programming a nonvolatile memory cell without physically erasing the memory cell. Each successive programming of the memory cell uses a correspondingly expanded erase state region to indicate an erase state for the memory cell.