Patent ID: 9007810
Filing Date: 2015-04-14
Classification: G11C

Abstract:
1. A method of operating non-volatile storage having a plurality of word lines, each of the word lines is associated with a plurality of memory cells, each of the memory cells having a reversible resistivity-switching material, the method comprising: applying a FORMING voltage to a group of the memory cells that are associated with a first word line of the word lines; testing memory cells in the group after applying the FORMING voltage to determine whether a resistance of respective ones of the memory cells in the group is less than a first reference resistance that is associated with being FORMED; repeating the applying the FORMING voltage and the testing memory cells for the first reference resistance until FORMING of the group of the memory cells is complete; testing memory cells in the group after applying the last FORMING voltage to determine whether a resistance of respective ones of the memory cells in the group is less than a second reference resistance that is associated with being over FORMED, wherein the second reference resistance is significantly below the first reference resistance; and applying a voltage to memory cells in the group that have a resistance that is less than the second reference resistance to increase the resistance.