A method to maintain phase-change memory pre-coding data retention after high temperature solder bonding process in embedded systems

Abstract

For the first time we demonstrate that a Phase Change Memory (PCM) packaged chip can hold pre-coded data after an industrial standard lead free solder bonding reflow process. Good "0" and "1" state distributions are retained in a 90nm 128Mb PCM chip after the soldering process. Furthermore, the tested chip endures more than 10 million write cycles after the pre-coding and high temperature process. © 2011 JSAP (Japan Society of Applied Physi.