An integrated DRAM-NVRAM, multi-level memory cell is comprised of a vertical DRAM device with a shared vertical gate floating plate device. The floating plate device provides enhanced charge storage for the DRAM part of the cell through the shared floating body in a pillar between the two functions....http://www.google.com/patents/US7457159?utm_source=gb-gplus-sharePatent US7457159 - Integrated DRAM-NVRAM multi-level memory
