Patent ID: 8158519

Claim:
A method of manufacturing non-volatile memory using a self-aligned metal silicide, the method being performed on a silicon substrate having more than one memory cell, polysilicon gate, source, and drain, and comprising the following steps: performing a washing process to remove a native oxide from a surface of the silicon substrate and then, forming a metal layer on zones for the polysilicon gates, the sources, and the drains, and on other zones by way of at least one of sputtering and chemical vapor deposition and then, forming a single barrier layer directly on the metal layer for protecting the metal layer against external air when the metal layer reacts with the silicon substrate to form a metal silicide, wherein the single barrier layer is a layer of only titanium nitride and then, subjecting the metal layer and the single barrier layer to a first time thermal process, so that the metal layer reacts with the silicon substrate to form a metal silicide and then, using a wet etching process to remove portions of the metal layer that do not react with the silicon substrate in the first time thermal process and remove the single barrier layer, so as to form a self-aligned metal silicide layer and then, conducting a second time thermal process on the self-aligned metal silicide layer, so that the metal silicide is internally formed into a phase-inverted metal silicide structure.