More fancy new memory, STT-RAM from Avalanche

Subject: General Tech | July 2, 2015 - 01:31 PM |
Tagged: STT-MRAM, Avalanche, pram, RRAM, non-volatile RAM, NRAM

STT-MRAM, Spin Transfer Torque Magnetic Random Access Memory, actually uses the spin of an electron to record a 1 or 0 making it quite scalable, though Avalanche's current proof of concept is built on a 55nm process.  Avalanche is hoping that their use of the common Serial Peripheral Interface bus and standard CMOS 300mm process will make this type of RAM easier to adopt than some of the other types of non-volatile RAM being developed such as RRAM, NRAM and Toshiba's STT-MRAM.  STT-MRAM can be incredibly fast, scale down well below 10nm and will not need multiple layers, which will reduce the heat produced even in extremely high densities.  Check out more on how they have designed their version of STT-MRAM over at The Register.

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"Startup Avalanche is sampling an STT-RAM chip offering DRAM/SRAM speed, persistent storage, unlimited endurance and scalability beyond 10nm."

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Source: The Register

NRAM research gets a financial boost

Subject: General Tech | June 15, 2015 - 01:42 PM |
Tagged: non-volatile RAM, Nantero, NRAM, STT-MRAM, RRAM, memristor, hp, Panasonic, toshiba

Non-volatile memory technology is now at a turning point where we find out which technology will be doomed to be BETAMAX and which will carry on to become the VHS equivalent; hopefully that analogy is not too accurate as VHS was not the better of the two.  Allyn discussed the reasons why the market is looking for a new technology back in 2012 and his predictions that NAND still had some life in it have been proven over the past few years but we are seeing new limitations with the current technology.

In the past we have covered HP's Resistive RAM, also called a Memrisitor, which has been in development for many years but has finally appeared in some Panasonic microcomputers which control sensors.  STT-MRAM, spin transfer torque magnetoresistive random access memory, is Toshiba's project and while we still haven't seen any product it has been in development for more than 3 years and news of prototypes should arrive soon.  Lastly is NRAM, nano-RAM so named for the use of carbon based nanotubes in its design which is being developed by Nantero.

It is Nantero which is in the news today, having secured $31.5 million in funding this year, triple what they have seen in previous years according to the numbers The Inquirer has.  This particular technology offers densities in the terabytes per chip, storage which requires no active power source once written to and data retention of over 1,000 years at 85 degrees Celsius.  The speeds should match those expected from STT-RAM but at a fabrication price closer to the much lower cost RRAM; don't hold off buying your next SSD but do not think that market is going to get boring any time soon.

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"It got $31.5m in an over-subscribed round to continue developing its nanotube-based non-volatile RAM (NRAM) semiconductor technology, which it says has DRAM read/write speed and is ultra-high density – think terabits."

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Source: Slashdot

Nanotubes will make fast non-volitile memory even if they are slow out of the gate

Subject: General Tech | November 7, 2012 - 03:29 PM |
Tagged: graphene, nanotubes, NRAM, non-volitle RAM, Van der Waals, Nantero

Nantero promised us that their nanotube based flash memory would be available in 2009 and disappointed us by failing to reach that goal but The Register has some great news, they currently have 4Mbit arrays of NRAM up and running in their labs.  These arrays are writing data as fast as 3 nanoseconds while producing reasonable heat and consuming what is described as low power.  Perhaps even more important in a market which is currently quite worried about the lifetime of flash memory, this nanotube based RAM has no write limit whatsoever and if it makes it into SSDs it will assuage the fears many users currently have.  The memory works based on resistance, when the tubes are not touching they are in a state of high resistance which represents a 0 and when touching they have low resistance and represent a 1.  The stiffness of the nanotubes keeps them in a separated state until close enough that the Van der Waals force keeps them touching ensures that this will be non-volatile RAM and will retain data without an external power source.  Hopefully we will be seeing more on this soon.

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"Carbon nanotubes (CNTs) are cylindrical carbon allotropes, molecules up to a millimetre long but just a nanometer thick, and have a length-to-diameter of up to 132,000,000:1. Their walls are made up of single-atom-thick carbon sheets - graphene. CNTs are members of the fullerene family and their properties include the ability to conduct electricity as well as copper, while being stronger than steel and as hard as diamond."

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Source: The Register