Patent ID: 9647207
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A resistive random access memory (RRAM) cell comprising: a bottom electrode layer; a group-V oxide layer arranged over the bottom electrode layer; a hafnium oxide based layer arranged over and abutting the group-V oxide layer; a capping layer arranged over and abutting the hafnium oxide based layer; a top electrode layer arranged over the capping layer; and a fully or partially formed conductive filament arranged within the hafnium oxide and group-V oxide layers, and extending from the group-V oxide layer into the hafnium oxide based layer, wherein the conductive filament includes an upper region and a lower region demarcated by an interface between the hafnium oxide and group-V oxide layers, and wherein the lower region has a smaller footprint than the upper region.