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Friday, May 07, 2004

Storing Three Bits In One Spot
Increasing storage density by packing more than 0 or 1 in a single memory cell is an appealing idea. Now, "researchers from the University of Southern California and NASA have built a prototype molecular memory device that stores three bits in the same spot." Each memory cell is a field-effect transistor (FET) made from a 10-nanometer-diameter indium oxide wire. By applying current to a gate electrode, the nanowire can have eight discrete levels of electrical conductance, therefore representing the eight combinations of 3 bits.

The prototype can retain data for 600 hours and provides a data density of 40 gigabits per square centimeter. The researchers think they can reach a density of 400 gigabits per square centimeter within 5 to 10 years. More details and references are available in this overview.
:: posted by Roland Piquepaille, 1:33 PM

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