1T-capacitorless bulk memory: Scalability and signal impact

Abstract

The 1-transistor floating body (1TFB) memory presents a possible solution for embedded memories, as it appears to scale, and does so with standard processing. This study investigates the signal limits of 1TFB memory as technology scales. It shows that although the signal DeltaVth remains nearly constant with scaling, the memory cells become susceptible to disturbance because the amount of stored charge decreases. In addition, the transistor mismatch increases with scaling, thus limiting the ability of conventional sensing methods to correctly read the memory.