A type of flash memory chip that replaces the floating gate with thin layers of material that "trap the charge." The charge trap is a sandwich of materials such as silicon-oxide-nitride-oxide-silicon (SONOS), metal-oxide-nitride-oxide-silicon (MONOS) and tantalum-aluminum oxide-nitride-oxide-silicon (TANOS), all of which are substantially smaller than the floating gate. See
flash memory and
future memory chips.