Patent ID: 8759807

Claim:
A memory cell, comprising: a first conductive structure having an upper surface; an opening within a single electrically insulative material and over the first conductive structure, the opening having a lower area and a wider upper area having sidewalls consisting of the single electrically insulative material; a first portion of a multi-portion programmable material over the first conductive structure directly against the upper surface of the first conductive structure and within the opening, the first portion filling the lower area of the opening and lining the sidewalls in direct physical contact with the single electrically insulative material, the first portion being configured as a container structure over a pedestal, the pedestal having a bottom width along a cross-section, the container structure having a second width which is greater than the bottom width; a second portion of the multi-portion programmable material within the container structure; a second conductive structure over the second portion; and wherein one of the first and second portions comprises an ion source region and the other of the first and second portions comprises a switching region.