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A computer model of the silicon and strontium titanate compound shows how SrTiO3 molecules are squeezed into the area of each Si crystal, causing the compound to take on a ferroelectric property.  (Source: NIST)

An actual view of the constructed film. The compound has been shown to be able to hold a polarized charge without needing external power. The charge can be re-written or erased, enabling electronic memory capabilities.  (Source: NIST)
Further work provides proof of concept for instant-on computing material.

Last month, DailyTech reported on a novel breakthrough compound, a combination of silicon and strontium titanate which when manufactured in just such a way, causes both non-ferroelectric materials to become ferroelectric. Ferroelectrics are nothing new; you can find them in various memory and "smart" cards.

So what's the hoopla all about? As the Cornell University compound is based on silicon, the de facto semiconductor in just about every piece of modern electronics, it could lead to the creation of ferroelectric transistors.

Ferroelectric compounds are handy because they can be used to create non-volatile memory. Non-volatile memory doesn't need power to save its contents. While this is all well and good, non-volatile memory isn't exactly rare either. Now if you apply that to a transistor, or the millions of transistors that make up the processors in our electronics, you might have something interesting.

These new transistors, should they come into fruition, would enable a deluge of devices known as "instant-on computers." Without the need to let an operating system button itself up for powering down, a user could simply push the power button and the computer would turn off there and then. Assuming the computer's RAM, transistors, and data storage devices were all composed of ferroelectric materials, another push of the button would bring the computer back on virtually instantly, and start it out right where it stopped - even in the middle of processing something silly like digits in pi.

Unfortunately, instant-on computers wouldn't remove the need for a boot process - the operating system and applications must still be initialized at some point - but assuming no unforeseen crashes or bugs, you would never have to reboot the machine during normal use. Simply power it off while not in use, and power it back on when you feel like shooting zombies.

In a paper lead-authored by Maitri P. Warusawithana, a process known as molecular-beam epitaxy was shown to be able to create the theoretical compound of silicon and strontium titanate. Another group at the University of Pittsburgh was able to verify by measurement that the substance was exactly what they wanted it to be, which was a ferroelectric material on a semiconductor substrate. The paper was published in last April's issue 17 of the journal Science.

Now, a paper led by Joseph Woicik of the National Institute of Standards and Technology, also a co-author of Warusawathana's paper, is showing that the compound can be used for data retention. After creating a thin film from the silicon and strontium titanate only a few molecules thick, a Cornell group led by Darrell Schlom successfully wrote, read and erased "data" to the material by a process called piezoresponse force microscopy. Though the data in this case was simple polarized domains, it shows proof of concept for all the work involved.

While the fabled instant-on silicon ferroelectric transistor still does not exist, the work being done by this long list of academies and institutions has continuously nudged it closer to reality. Rather than postulating the feasibility of existence for instant-on electronics, it may be time to think about where they will be the most useful and welcome to consumers and government.

Contributors to Woicik's paper can be found not only at NIST, but the University of Pittsburgh, Pennsylvania State University, Northwestern University, Motorola, Ames Laboratory at the Department of Energy, Intel Corporation and Tricom Tech with data taken from the Advanced Photon Source at Argonne National Laboratory. The work has thus far been funded by the National Science Foundation and the Office of Naval Research.



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Cost?
By Spivonious on 5/11/2009 10:44:39 AM , Rating: 1
I'm assuming this is much cheaper to produce than existing SRAM modules, or it wouldn't be big news.




RE: Cost?
By HVAC on 5/11/2009 10:53:28 AM , Rating: 2
quote:
than existing SRAM modules,


Perhaps you meant to say "existing NVRAM modules"? SRAM still loses data in power off situations.


RE: Cost?
By Alexstarfire on 5/11/09, Rating: -1
RE: Cost?
By Spivonious on 5/11/2009 12:07:59 PM , Rating: 2
D'oh! Yes I got SRAM confused with NVRAM.

At the very least we won't need CMOS batteries any more.


RE: Cost?
By sprockkets on 5/11/2009 3:26:55 PM , Rating: 1
I think you still will. Something has to power the clock when the power goes out. As it stands, all your BIOS settings can be in say, flash, but the clock of course needs to keep going, so maybe that is why they never bothered saving it there.


orly?
By jrollins006 on 5/11/2009 9:15:47 AM , Rating: 1
quote:
a Cornell group led by Darrell Schlom successfully wrote, read and erased "data" to the material by a process called piezoresponse force microscopy. Though the data in this case was simple polarized domains, it shows proof of concept for all the work involved.


I would like to know what kind of data they wrote,read, and erased, was it like temp data (i.e RAM) or was it like the data we save to our HDD, if it was I'd like to know how much this material could potentially hold




RE: orly?
By LeviBeckerson (blog) on 5/11/2009 9:22:21 AM , Rating: 2
"Simple polarized domains" leads me to believe it was simply junk "data," or on/off, 1/0, however you want to look at it.

The reality is that the material could feasibly function as any of the examples you give. As the concept has just been proven, I haven't seen any speed or density data available, but I will endeavor to bring the numbers to light should I find them.


RE: orly?
By Alphafox78 on 5/11/09, Rating: -1
RE: orly?
By SublimeSimplicity on 5/11/2009 10:41:20 AM , Rating: 2
Never mind RAM and HDD... this article is talking about this being used everywhere (ie processor FIFOs and registers).

In other words from the OS's perspective it could be in the middle of scheduling a new thread or servicing an interrupt at 6pm when the power gets pulled and finish at 8am when power is restored :)


How many flops before it flops?
By Cr0nJ0b on 5/12/2009 5:16:10 PM , Rating: 2
I may be confused here, but don't most of these FE modules have a set number of flip-flops they can perform before they lose their reliability? I know that for an SD card you only get a set number of Reads and Writes to a block space before that block just goes bad. Wouldn't that be even worse for a processor that is continuously flipping states millions of times.

The idea sounds cool to me, if they get it to work. Personally, I never turn my system off anymore. It's Vista, so I reboot it once a week to clear out the cobwebs...but I use S3 for all my systems and I love it.

Instant on would be better, but the reliability question has me worried. I mean, if a state change happens in this FE transistor at the CPU core and the system comes back up...will that corrupt my process? Memory? crash? Oh, well...it's all future talk. I'll wait and see what they actually build.




umm...
By zaaf on 5/11/09, Rating: 0
"There is a single light of science, and to brighten it anywhere is to brighten it everywhere." -- Isaac Asimov














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