Storage devices based on resonant tunneling
The present invention discloses a resonant tunneling device. Further, the present invention discloses a memory storage device utilizing a resonant tunneling barrier. Moreover, the present invention teaches an SRAM circuit utilizing a resonant tunneling device. Additionally, the present invention teaches an NROM and NAND device utilizing a resonant tunneling barrier.
1 . A storage device comprising:
a source,
a resonant tunneling barrier coupled to said source,
a drain coupled to said resonant tunneling barrier,
a floating gate,
a blocking layer, and
a gate electrode,
wherein said floating gate is sandwiched between said blocking layer and said resonant tunneling barrier, and said blocking layer is sandwiched between said floating gate and said gate electrode.
2 . The storage device as claimed in claim 1 wherein said resonant tunneling barrier comprises:
a first bandgap,
a second bandgap, and
a third bandgap sandwiched between said first bandgap and said second bandgap;
wherein said first bandgap and said second bandgap are larger than said third bandgap.
3 . The device as claimed in claim 2 wherein said first bandgap consists essentially of one of SiO 2 and Al 3 O 4 .
4 . The device as claimed in claim 2 wherein said second bandgap consists essentially of one of SiO 2 and Al 3 O 4 .
5 . The device as claimed in claim 2 wherein said third bandgap consists essentially of one of poly-crystalline silicon, crystalline silicon, Pt, Ir, Ni, Ge, Be, Re, TaO, TaN, BaTiO, BaZrO, ZrO, HfO, TiN, Ti, ZrN, WN, Mo, MoN, and MoSi.
6 . The device as claimed in claim 3 wherein said second bandgap consists essentially of one of SiO 2 and Al 3 O 4 .
7 . The device as claimed in claim 6 wherein said third bandgap consists essentially of one of poly-crystalline silicon, crystalline silicon, Pt, Ir, Ni, Ge, Be, Re, TaO, TaN, BaTiO, BaZrO, ZrO, HfO, TiN, Ti, ZrN, WN, Mo, MoN, and MoSi.
8 . The storage device as claimed in claim 1 wherein said blocking layer is a thin oxide film.
9 . The storage device as claimed in claim 1 wherein said device consists essentially of one of a flash memory cell, NAND, NOR, NROM, and MirrorBit.