Dual floating gate unified memory MOSFET with simultaneous dynamic and non-volatile operation

Dual floating gate flash memory has been fabricated and characterized to show dynamic operation, non-volatile operation, and simultaneous dynamic and non-volatile operation. The gate stack consists of a thin dielectric separating two floating gates sandwiched between a tunnel dielectric and interpoly dielectric. The quality of the thin dielectric that separates the floating gates is of utmost importance to retain dynamic operation. In this letter, we investigate a dual floating gate memory transistor and show its potential to combine DRAM and flash functionality in the same device.