This invention concerns a non-volatile memory device with a polarizable
layer. The apparatus concerns a substrate, a buried oxide layer within
the substrate, and a polarizable layer within the substrate. The
polarizable layer is formed in a buried oxide layer of a
silicon-on-insulator substrate for the fabrication of non-volatile
memory. The process of creating the polarizable layer comprises
implanting, through the active silicon layer, Si ions into the buried
oxide layer at an ion implantation energy selected so that the implanted
ion has its peak concentration between 5 50 nm from the silicon/buried
oxide interface. The implantation step can occur while externally heating
the silicon-on-insulator substrate at a temperature between 25 300
degrees Celsius. An annealing step may be completed to repair any damage
the implantation may have created in the silicon-on-insulator substrate.