Enhancing Number of Bits Via Mini-Energy Band Transitions Using Si Quantum Dot Channel (QDC) and Ge Quantum Dot Gate (QDG) FETs and NVRAMs

This paper presents multi-state QDC-QDG FET structures that has the potential to introduce additional states (8 or 16) by utilizing additional mini-energy sub-bands. Mini-energy bands are formed in Si quantum dot channel (QDC) comprising two silicon oxide cladded Si quantum dots (QDs). Quantum simulations are presented to show more states when additional two germanium oxide cladded Ge dots are added on top of two Si QD layers in the gate region. With the addition of a control gate oxide layer, we transform the QDC-QDG-FET into a quantum dot (QD) nonvolatile random access memory (NVRAM). Quantum simulations are presented.