Patent ID: 9218886
Filing Date: 2015-12-22
Classification: G06F,G11C

Abstract:
1. A three dimensional nonvolatile memory comprising: a block that comprises a plurality of zones, each zone containing at least one separately selectable set of strings, corresponding word lines of all sets of strings in the block formed from a continuous conductive body; a first reference set of strings in a first zone, the first reference set of strings providing first characterization data that is used to configure a first set of operating parameters for the first zone, the first set of operating parameters including parameters applied to memory cells of the first zone during programming, reading, or erasing; a second reference set of strings in a second zone that is adjacent to the first zone, the second reference set of strings providing second characterization data that is used to configure a second set of operating parameters for the second zone, the second set of operating parameters including parameters applied to memory cells of the second zone during programming, reading, or erasing that are different to the first set of operating parameters; and memory access circuits that are configured to access memory cells of the first zone using the first set of operating parameters and to access memory cells of the second zone using the second set of operating parameters.