Method and apparatus for copying data with a memory array having redundant memory

摘要

A page copy operation such as copy back programming is performed between a source page of the memory array and a destination page of the memory array in different segments. The segments divide the columns of the main array and the set of redundant columns of the redundant array into, for example, sets of rows. The copy back programming transfers data from a part of the source page in the redundant array to a part of the destination page in the main array, and transfers data from a part of the source page in the main array to a part of the destination page in the redundant array.

主权项

1. A memory device comprising:
a memory array arranged into:
a main array divided into a plurality of segments, the main array having a quantity of main array columns; anda redundant array having a quantity of redundant array columns, the redundant array divided into the plurality of segments corresponding to the main array,wherein a set of defective positions in a particular segment of the main array is replaced by redundant memory in a corresponding particular segment of the redundant array, the set of defective positions positioned in a subset of the quantity of main array columns of the main array, the subset smaller than the quantity of redundant array columns; control circuitry supporting a page copy operation between a source page of the memory array and a destination page of the memory array in different segments of the plurality of segments, the source page located in the main array and the redundant array, the destination page located in the main array and the redundant array, the page copy operation transferring data from a part of the source page in the redundant array to a part of the destination page in the main array.