Patent ID: 9269425
Filing Date: 2016-02-23
CPC Classification: G11C,H01L

Claim Text:
1. A non-volatile storage system, comprising: a substrate; a monolithic three dimensional array of non-volatile storage elements positioned above and not in the substrate, the non-volatile storage elements include reversible resistance switching material; word lines connected to the non-volatile storage elements; bit lines connected to the non-volatile storage elements; a plurality of select devices that are connected to the bit lines; and a plurality of select lines connected to the select devices; wherein the non-volatile storage elements can be set to a low resistance state during operation by biasing the word lines and bit lines to apply a set voltage to the non-volatile storage elements, the non-volatile storage elements can be reset to a high resistance state during operation by biasing the word lines and bit lines to apply a reset voltage to the non-volatile storage elements, prior to operation the non-volatile storage elements undergo a forming process, during the forming process the word lines and bit lines are biased to apply a forming voltage to the non-volatile storage elements with a polarity such that a higher voltage is applied to anodes and a lower voltage to cathodes for the non-volatile storage elements, the cathodes have a lower electron injection energy barrier to the reversible resistance switching material than the anodes, during the forming process an intermediate voltage is driven on the select lines so that the select devices are partially on and are limiting the current through the bit lines, the intermediate voltage is less than a selected voltage during operation and more than an unselected voltage during operation.