Data conditioning to improve flash memory reliability

摘要

Methods and apparatus for managing data storage in memory devices utilizing memory arrays of varying density memory cells. Data can be initially stored in lower density memory. Data can be further read, compacted, conditioned and written to higher density memory as background operations. Methods of data conditioning to improve data reliability during storage to higher density memory and methods for managing data across multiple memory arrays are also disclosed.

主权项

1. A method for managing data stored in a memory device, the method comprising:
reading user data from a first array of memory cells of the memory device having a first density; performing a data handling operation on the read user data to generate other data, wherein the data handling operation comprises changing a value of the read user data to generate the other data; and writing the other data to a second array of memory cells of the memory device, wherein the second array of memory cells stores the other data in a second density, and wherein the second density is different than the first density; wherein the value of the user data can be recovered from reading the other data from the second array of memory cells; wherein changing the value of the read user data to generate the other data comprises adjusting the value of the read user data for program disturb effects such that after the program disturb effects have taken place, the other data written to the second array of memory cells has the value of the read user data.