Patent ID: 9019770
Filing Date: 2015-04-28
Classification: G11C

Abstract:
1. A memory read method for a rewritable non-volatile memory module, wherein the rewritable non-volatile memory module has a plurality of memory cells, a plurality of word lines and a plurality of bit lines, each of the memory cells electrically connected to one of the word lines and one of the bit lines, each of the memory cells stores at least one bit data, each of the bit data is identified as a first state or a second state according to a voltage, and the memory cells constitute a plurality of physical pages, the memory read method comprising: applying a test voltage to a first word line among the word lines to read a plurality of verification bit data, wherein a threshold voltage set is set with a first read voltage value set and assigned to the first word line; calculating a variation of bit data identified as the first state among the verification bit data; obtaining a second read voltage value set according to the variation; updating the threshold voltage set with the second read voltage value set; and using the threshold voltage set updated with the second read voltage value set to read data from a first physical page among the physical pages, wherein memory cells constituting the first physical page among the memory cells are electrically connected to the first word line.