Patent ID: 9263673
Filing Date: 2016-02-16
CPC Classification: H01L

Claim Text:
1. A resistive memory device, comprising: a lower interconnection extending in a first direction; an upper interconnection extending in a second direction perpendicular to the first direction; and a memory cell disposed at a location at which the lower interconnection crosses the upper interconnection, wherein the memory cell comprises: a switching device; a lower electrode disposed on the switching device; a resistor disposed on the lower electrode; and an upper electrode disposed on the resistor, wherein the switching device comprises: a lower diode having a lower cathode; and an upper diode disposed on the lower diode, and having an upper cathode, and wherein each of the upper cathode and the lower cathode comprise at least one layer of doped material, and the average dopant concentration of the upper cathode is greater than the average dopant concentration of the lower cathode.