Floating Body Cell with Independently-Controlled Double Gates for High Density Memory

An aggressively scaled, self-aligned, independently controlled double-gate floating body cell (IDG FBC) is reported. This structure eases the scaling constraints of other FBC memory devices proposed to date. Enhanced memory performance has been demonstrated owing to the independent back gate with thin oxide and thin Si fin. Memory devices with 85-nm Lg and 30-nm fin widths (Z) have been shown to exhibit better memory characteristics at a lower voltage than alternative FBC structures at comparable dimensions. Design, fabrication, operation, and scalability of IDG FBC devices are discussed