Options investigated in GOSSAMER Tunnel dielectric Trapping layer Blocking layer Gate material SiO2 (nitrided) Si3N4 Al2O3 Ta Standard TANOS Options investigated in GOSSAMER SiO2 different growth conditions Nitrided SiO2 different growth conditions BE dielectric (SiO2 /Si3N4/HTO or re-ox) Si3N4 different stochiometries HfO2 different deposition/thermal treatment ZrO2 different deposition/thermal treatment ZrAlO and ZrSiO nanolaminates LaAlO nanolaminates Al2O3 different deposition/thermal treatment “ “ with SiO2 buffer layers HfAlO, LaAlO DyScO, GdScO, TbO, TbSCO TiN TaN different deposition TaC technologies TaCN
1Gb TANOS demonstrator Numonyx inserted the Charge Trap cell into a 1Gbit 1.8V NAND device adapting cell pitch at row and column decoders thanks to an advanced copper metallization The device includes 1.8 billion cells but only 1 G is addressable due to the re-use of an existing cell design. 500Mbit array RAM Picture of 1Gbit NAND Charge Trap Flash Schematic layout ~40nm 2
22nm demonstration 4Mbit addressable array at 25nm In Self-Aligned structure, W narrowing increases P/E efficiency Down to 1x nm node we estimate no significant degradation of P/E windows
3-D architectures Multi-plane architecture Vertical SONOS Cell(imec) - Effect of floating body channel Effect of poly-silicon channel Effect of wrap-around SONOS cell 30nm 25nm OXIDE gate Program v.s. diameter programming voltage