Also found in: Dictionary, Thesaurus, Acronyms.


(NanoRAM) A non-volatile, random access memory technology from Nantero, Inc., Woburn, MA ( that is being developed to initially replace flash memory and ultimately DRAM and SRAM memories. NRAM uses carbon nanotubes for the bit cells, and the 0 or 1 is determined by the tube's physical state: up with high resistance, or down and grounded.

NRAM is expected to be faster and denser than DRAM and also very scalable; able to handle 5 nm bit cells whenever CMOS fabrication advances to that level. It is also very stable in its 0 or 1 state. Using standard CMOS fabrication facilities, Nantero licensed NRAM to companies for commercial production. See future memory chips.

Spin Coat the Tubes onto the Wafer
Making NRAM cells is quite fascinating. A solution of purified carbon nanotubes is placed onto a wafer with predefined round electrodes and spun at centrifugal force to spread the fluid. The tubes wind up in random polarizations, spread evenly across the wafer and over the electrodes. Subsequent steps remove the extraneous tubes and add the interconnects. Each electrode with its carbon tubes becomes a memory cell (see below).

The Bits Are Nanotubes
An NRAM 0 or 1 bit is determined by whether the tubes are straight up or bent down. Changing the charge on the electrode changes the data state (0 or 1) by attracting or repelling the positively charged nanotube. When straight up, the tubes have high resistance; when bent down, they have low resistance. The distance between up and down is 1/10,000 of a human hair.

Making the NRAM Cells
Only two cells are shown here to illustrate the concept; however, billions of cells are created on a wafer, and many, many more tubes land over each electrode.
References in periodicals archive ?
We attempted to contact NRAM for a comment but no-one was available.
Signaling a new era in memory, Nantero's NRAM has already been installed in multiple production fabs and is currently being designed into innovative new electronic products that require increased storage, low power consumption, high speed, reliability, and high endurance.
NRAM clawed its way out of the red in the first half, with underlying pre-tax profits of pounds 167.
PRODUCT OVERVIEW II-8 Nanotechnology: Breaking Conventional Size Barriers II-8 Volatile and Non-Volatile Memory II-8 Nanomemory: An Introduction II-9 Select Nanomemory Types - Features, and Applications II-9 Comparison of Select Nanomemory Technologies- FRAM, MRAM, and Ovonic Unified Memory II-10 FRAM II-10 MRAM II-11 Ovonic Unified Memory II-11 Holographic Memory II-12 NRAM II-13 Molecular Memory II-13 Polymer Memory II-13
UKAR has also completed the sale of the NRAM standalone unsecured personal loan book for PS0.
This latest round of funding comes at a significant juncture as the company transitions from development to commercialization of its next-generation memory, NRAM (TM), and licensees begin to bring Nantero's technology to market.
NRAM was the socalled "bad bank" part of Northern Rock when the two were split apart by the Government.
4m pre-tax loss for 2010 and said this week it is axing 680 more jobs, NRAM is permanently shut to new lending.
Catherine Argent, formerly at Northern Rock and latterly the head of the litigation team at NRAM, leads the new financial institution disputes team at Muckle LLP.
In addition to its work developing NRAM, Nantero is actively licensing its intellectual property portfolio to both startups and established companies for the development of other products that incorporate carbon nanotubes.
As the financial crisis unfolded Northern Rock was split into two businesses and during 2011 she became head of the NRAM litigation team, taking them through the initial stages of integration with Bradford & Bingley.