An inverted PCRAM cell is formed by plating the bottom electrode, made of copper for example, with a conductive material, such as silver. Chalcogenide material is disposed over the plated electrode and subjected to a conversion process so that ions from the plated material diffuse into the chalcogenide...http://www.google.fr/patents/US7071021?utm_source=gb-gplus-shareBrevet US7071021 - PCRAM memory cell and method of making same
