US Patent 8064253 - CNT multi-valued memory

http://www.freepatentsonline.com/8064253.html

This patent from Toshiba teaches a way to create more reliable multiple bit memory transistors using carbon nanotubes or nanowires. Claim 1 reads:

1. A multivalued memory device comprising:

a first multivalued memory transistor and a second multivalued memory transistor,

wherein the first multivalued transistor has a channel made from at least one carbon nanotube or nanowire, and

the second multivalued transistor has a channel made from at least two carbon nanotubes or nanowires,

wherein data is stored by varying the number of carbon nanotubes or nanowires used in each of the respective channels, wherein the channels are at least one carbon nanotube or nanowire which allows current to flow through it.