Patent ID: 8653496

Claim:
A memory cell, comprising: a multi-layer structure across a titanium-nitride-containing surface of an electrode; the multi-layer structure having a thickness in a range of from about 2 nanometers to about 30 nanometers; one of the layers of the multi-layer structure being a first layer and being directly against the first electrode; the first layer comprising TiO x N y , where x is in a range of from greater than 0 to about 2, and where y is in a range of from greater than or equal to 0 to about 1; a ratio of nitrogen to oxygen within the TiO x N y being configured as a gradient of decreasing nitrogen concentration with the highest nitrogen concentration being directly against the first electrode; another of the layers of the multi-layer structure being a second layer and consisting of TiO 2 ; and programmable material over the second layer.