Editing Nano-RAM (section)

==Characteristics==
NRAM has a density, at least in theory, similar to that of DRAM.  DRAM includes capacitors, which are essentially two small metal plates with a thin insulator between them. NRAM has terminals and electrodes roughly the same size as the plates in a DRAM, the nanotubes between them being so much smaller they add nothing to the overall size. However it seems there is a minimum size at which a DRAM can be built, below which there is simply not enough charge being stored on the plates. NRAM appears to be limited only by [[lithography]]{{Citation needed|date=November 2018}}. This means that NRAM may be able to become much denser than DRAM, perhaps also less expensive.  Unlike DRAM, NRAM does not require power to "refresh" it, and will retain its memory even after power is removed. Thus the power needed to write and retain the memory state of the device is much lower than DRAM, which has to build up charge on the cell plates. This means that NRAM might compete with DRAM in terms of cost, but also require less power, and as a result also be much faster because write performance is largely determined by the total charge needed. NRAM can theoretically reach performance similar to SRAM, which is faster than DRAM but much less dense, and thus much more expensive.