Patent ID: 7910407

Claim:
A method of making a semiconductor device, comprising: forming a conductor layer; forming a resistivity switching storage element layer over the conductor layer; forming at least one first layer of a diode steering element over the resistivity switching storage element layer; patterning the conductor layer, the resistivity switching storage element layer and the at least one first layer using a first mask to form a plurality of patterns, each pattern comprising a portion of the conductor layer, a portion of the resistivity switching storage element layer and a portion of the at least one first layer; filling spaces between adjacent patterns with a gap fill insulating material; forming at least one second layer of the diode steering element over the patterns and over the gap fill insulating material such that the at least one second layer contacts portions of the at least one first layer in the plurality patterns; and patterning the at least one second layer, the portions of the at least one first layer, and portions of the resistivity switching storage element layer using a second mask to form a plurality of diodes each comprising one portion of the second layer, at least three portions of the first layer separated from each other by the gap fill insulating layer and at least three resistivity switching storage elements separated from each other by the gap fill insulating layer, wherein each of the at least three portions of the first layer contacts one of the at least three resistivity switching storage elements.