How Vacuum Tubes, New Technology Might Save Moore's Law 183
MojoKid (1002251) writes The transistor is one of the most profound innovations in all of human existence. First discovered in 1947, it has scaled like no advance in human history; we can pack billions of transistors into complicated processors smaller than your thumbnail. After decades of innovation, however, the transistor has faltered. Clock speeds stalled in 2005 and the 20nm process node is set to be more expensive than the 28nm node was for the first time ever. Now, researchers at NASA believe they may have discovered a way to kickstart transistors again — by using technology from the earliest days of computing: The vacuum tube. It turns out that when you shrink a Vacuum transistor to absolutely tiny dimensions, you can recover some of the benefits of a vacuum tube and dodge the negatives that characterized their usage. According to a report, vacuum transistors can draw electrons across the gate without needing a physical connection between them. Make the vacuum area small enough, and reduce the voltage sufficiently, and the field emission effect allows the transistor to fire electrons across the gap without containing enough energy to energize the helium inside the nominal "vacuum" transistor. According to researchers, they've managed to build a successful transistor operating at 460GHz — well into the so-called Terahertz Gap, which sits between microwaves and infrared energy.
That would be handy for radio astronomy too (Score:5, Interesting)
Re:The problem is not switch speed (Score:5, Interesting)
Asynchronous designs are faster (~3x) and consume less energy (~2x) but need an overhaul of the production process who is deemed too costly. Perhaps this technology could make it interesting again. (Source [columbia.edu])
transistors held back by manufactures.. (Score:-1, Interesting)
If you calculate Moore's law from 2000 to 2014 you find it to have been held back and not honored. Manufactures basically capped consumer level processors at 1 billion and quad cores and refused to push it hardly any further except in military technology. In 2000 the Athlon Thunderbird had 34 million transistors and after applying Moore's law in 2014 our desktop rigs should have at least 30 billion. Instead they have 1 billion.
Also the first 1 billion transistor CPU was an Intel Itanium.. Built in 2006 on 90nm year 2002 fab technology showing you what could have been done in 2002 but took till 2006 due to laziness and bad product designs being used for the consumer level market.
I think the military plays a role in all this because theoretically they would be designing transistor based applications without these limitations perhaps including single CPUs 512 times faster than the consumer level counterparts. Making me think the old adage about the military being up to 30 years ahead of the civilian technology is true. It is certainly true when their quantum level remote brain reading / manipulation technology gets looked at; nothing compares or even does a part of it in the consumer market but it does exist. Why would the military hold the technology back or deliberately cripple the consumer level stuff? Engineering profits is one factor of the manufactures but another issue is to keep weapons out of the civilian populations hands, and also to give the exclusive upper hand to the military. Previously DOD would claim even the PS2 was a weapon and this is the logic I apply to all computer technology as either weapons can be designed faster or new electronic weapons automated and engineered using the held back technologies .. Many technologies are legit being held back and have been held back for decades as a result of these policies.
More details at http://www.obamasweapon.com/ [obamasweapon.com]
Re:That would be handy for radio astronomy too (Score:5, Interesting)
I just noticed another disingenuous aspect to their claim - they say that because this operates at "atmospheric" pressure it will be more reliable than vacuum tubes of yore.
But these vacuum FETs are filled with 1 atmosphere of helium, so the partial pressure difference with the outside world for all other gases will still be the same as though it was operating with a full vacuum, and this device would require the same long-term hermetic packaging as a vacuum tube. It relies on helium to extend the mean free path of the electrons, though to be fair as dimensions are scaled down further from the current 100nm to say 20nm perhaps neither helium nor vacuum would be required. Still it seems to be a very misleading claim.
Ahead of schedule. (Score:5, Interesting)
"It was a nice feeling to have a Microvac of your own and Jerrodd was glad he was part of his generation and no other. In his father's youth, the only computers had been tremendous machines taking up a hundred square miles of land. There was only one to a planet. Planetary ACs they were called. They had been growing in size steadily for a thousand years and then, all at once, came refinement. In place of transistors had come molecular valves so that even the largest Planetary AC could be put into a space only half the volume of a spaceship."
- Issac Asimov, The Last Question, 1956.
Ideal technology for high radiation/space (Score:4, Interesting)
This looks like the ideal technology for electronics that have to work in extremes of temperatures or high radiation environments. I'm surprised the military and aerospace industries aren't jumping all over this.