A Greener Chip Manufacturing Process 68
gardenermike writes "A new chip manufacturing process has been developed which uses UV light instead of high temperatures to prepare the silicon. This could lead to cheaper chips and greener factories if it pans out. Apparently the main problem is defects in the material, which are currently 'ironed out' as a side-effect of the extreme temperatures used."
Seems Ideal for nanotechnology (Score:1, Insightful)
for custom fabricating nanocircuitry for nanomachines this seems like an awesome idea.
so how long till we have a swarm of replicators based on this technology
Re:Seems Ideal for nanotechnology (Score:1)
Well, first this technology would have to produce Reese [wikipedia.org] so we won't have to worry too much...
In reality, though, Replicator-like situations [wikipedia.org] are infeasible on planets which already have lifeforms(like humans or Asgard). That isn't to say, though, that nanotechnology wouldn't be a very deadly weapon, for example nanobots designed to destroy one's nervous system.
Re:Seems Ideal for nanotechnology (Score:2)
still, I wouldn't worry too much, as self reproducing nanotech still wouldn't realistically be able to wipe out organic life. they could easily consume all the technological resources of a world, but the cost of wiping out organic life would likely be a dead giveaway that eith
Re:Seems Ideal for nanotechnology (Score:1)
Re:Seems Ideal for nanotechnology (Score:2)
and i spent 28 GAME YEARS forging a chaos blade
Greener Chips? (Score:2, Funny)
Re:Greener Chips? (Score:1)
Re:Old news... (Score:2)
Greener Chips... (Score:2, Funny)
Re:I'm disappointed. (Score:1)
Let me be the first to say, "Cool process, man!"
OK, it's not much better.
What were you expecting? (Score:2)
Let's face it...there just really ain't many good jokes about green chips!
Side-effect my @$$ (Score:5, Insightful)
I'd hardly call it a side-effect to have a process that minimizes defects. I'd rather call that an essential-effect.
Re:Side-effect my @$$ (Score:3)
Re:Side-effect my @$$ (Score:2)
Re:Side-effect my @$$ (Score:1)
>>out' as a side-effect of the extreme temperatures used.
>I'd hardly call it a side-effect to have a process that minimizes defects. I'd rather
> call that an essential-effect.
Actually, the truth of the matter is that semiconductors NEED defects. Implanting phosphorus atoms (or whatever dopant you choose to use) induces defects - the atoms are injected into the silicon wafers at very high energies,
Re:Side-effect my @$$ (Score:2)
Typcially dopants are called "impurities," not defects.
Re:Side-effect my @$$ (Score:2)
the former is a problem the latter is essential. Unfotunately the most controlled processes for adding impurities also give a lot of lattice defects needing an annealing step to repair the lattice. Annealing however has problems of its own (lots of heat needed and it tends to cause diffusion between regions).
Just in time to be obsolete (Score:5, Interesting)
Re:Just in time to be obsolete (Score:5, Insightful)
SiO2 will still be used in non-critical layers and in less-than-leading-edge technology, which there is a lot of, and will be for a long time to come. Not all chips are CPUs. In fact, most aren't. It's worth a look.
TFA also said it might allow manufacturing semiconductors on substrates (other than Si) which heretofore wouldn't be possible due to their inability to withstand the high temperatures.
Re:Just in time to be obsolete (Score:2)
I imagine that this process could cut costs for flash memory. The amount that will be manufactured in the near future will be measured in square kilometers.
Re:Just in time to be obsolete (Score:2, Funny)
Ah Pentiums, gotcha...
Low temp substrates (Score:2)
It's kind of funny to see stuff like this because it reminds me how industry folks tend to think about near term (5-10 years) and academic types tend to think long term (>10 years). Dr. Shanefield was definitely an industry guy.
Re:Just in time to be obsolete (Score:3, Informative)
Solar power applications? (Score:4, Interesting)
Re:Solar power applications? (Score:2)
Re:Solar power applications? (Score:2)
In simple terms - glue for good nanotech material (Score:3, Interesting)
The reason I mentioned this is because zone refining of silicon to ultimately make large diameter single crystal wafers is an expensive and highly energy intensive process and i
Re:Solar power applications? (Score:1)
Would this process also be useful for making silicon based solar cells?
Doubtful. Silicon solar cells generally don't use any silicon dioxide layers, so a low-temperature method for forming silicon dioxide isn't much help. Not to mention that most of the cost of a solar cell is in the silicon wafer itself, not anything you do to the silicon after wafer production.
Re:Solar power applications? (Score:2)
And silicon wafers are in tight supply (Score:2)
Green Chips (Score:4, Funny)
Green Chips (Score:2)
Green chips are supposed to be eaten ala "Soylent Green [imdb.com] .
FalconRe:Green Chips (Score:1)
I tried some soymilk once, I learned to stay away (Score:1, Offtopic)
I used to drink soymilk as well but stopped because it's high in carbohydrates. Tell the truth I prefer real milk anyway.
FalconRe:I tried some soymilk once, I learned to stay aw (Score:2)
have you tried almond milk? (Score:2)
If it's warm, it tastes horrible, so drink it cold.
Yes, I rather liked almond milk, then again I like almonds though I prefer amaretto and pistachios. However I don't, er didn't drink it plain, I used it when making espresso.
FalconRe:have you tried almond milk? (Score:2)
Green SoyMilk (was:I tried some soymilk once) (Score:2)
OH MY GOD!!! SoyMilk Green is made of
Alright, so it just doesn't have the same impact as "people!", does it?
Re:I don't care. (Score:3, Interesting)
I won't even bother to address your "I'm not paying for it so I don't care" jackass attitude toward the environment.
Re:I don't care. (Score:4, Interesting)
you compute probably uses around 1KWh every6 hours.(probably more like 4 hours)
let's se you pay12cents a KWh
thats 48 cents a day. about 15 bucks a month.
figure half of that is the amount of time that you would be using the computer anyway.
extra 7.5 bucks a month.
If you use AC, then it costs you even more.
90, 65, 45, 32 nm--where do these #s come from? (Score:4, Interesting)
Re:90, 65, 45, 32 nm--where do these #s come from? (Score:2, Informative)
The semiconductor companies get together and publish a roadmap called ITRS [itrs.net] that says we should all try to get to X nm by 20xx, and here are the challenges, etc.
Now someday we're going to get to one of these technology nodes, as they're called, and find out there really is a fundamental phyiscal limitation that keeps us
Re:90, 65, 45, 32 nm--where do these #s come from? (Score:2)
http://www.itrs.net/Common/2005ITRS/Litho2005.pdf [itrs.net]
http://public.itrs.net/Files/2002Update/2002Updat
Re:90, 65, 45, 32 nm--where do these #s come from? (Score:5, Informative)
Half generations: 1000, 500, 250, 130, 65, 32, 16
Whole generations: 650, 350, 180, 90, 45, 22
The precise digits are chosen for convenience and actual processes vary a bit up and down for a given technology node. Each node requires new equipment. By moving from node to node together, manufacturers share some of the cost of development. Still, odd ball nodes do exist. DRAM's are often manufactured at intermediate dimentions and 150nm is used by some foundaries.
Many fabless chip makers will skip half generations. I know a lot of manufacturers went straight from 350 to 180. Still, the choice to skip or not is mostly economic. If a node lands durring a recession, fabless chip makers are likely to hold off until the node that follows. The fabs don't really have a choice. They have to produce each generation in sequence, at least at small scale, or they will not have the technological base to start work on the nodes that follow.
Re:90, 65, 45, 32 nm--where do these #s come from? (Score:5, Informative)
square root of 2. (Score:3, Informative)
The reason for this is that if you decrease the feature size by the square root of 2 on each side, the feature shrinks to half size (since they are 2D features).
You can see this by squaring them all
180^2 = 32,400
130^2 = 16,900
90^2 = 8,100
65^2 = 4,225
45^2 = 2,025
32^2 = 1,024
22^2 = 484
16^2 = 256
See how each is half the size of the previous?
I guess doubling the number of things (transistors) makes sense to humans. It sure makes it easy to calculate how many
Re:square root of 2. (Score:2)
Basically the goal of each node is for the circuits to be twice as dense, so hopefully each design rule scales by 0.707.
This is greenish, not green (Score:2, Insightful)
"could reduce the prices of electronic devices for consumers and, of course, create a positive environmental impact"
Seems wrong: Isn't production only a small part of actual environmental impact?
Of course any "greener" pruduction method helps, but when I think about green chips, I think about chips like the efficeon chip from Transmeta [transmeta.com].
Re:This is greenish, not green (Score:1)
Heat capacity of Si at 25 C: 19.789 J/(mol*K)
Too lazy to look up the heat capacity at other temperatures right now, so let's estimate it to be twice that much at 1000 C.
Mass of Si: 28g/mol
So that's up to 1.4 J/(g*K).
Heating by 1000 K is an estimated 1400 J/g (max).
How much does you average CPU die weigh? 1g? 2g? Let's assume 10
A Greener Chip Manufacturing Process (Score:2)
While the new process may not use as much energy in the manufacture of ICs, chips, the article says nothing about water usage. As it is now ic fabs use prodigious amounts of deionized water.
FalconRe: A Greener Chip Manufacturing Process (Score:3, Insightful)
Re: A Greener Chip Manufacturing Process (Score:2)
Not only that, but there are a lot of harsh chemicals that are used in manufacturing semiconductors, and this is a concern on many levels (exposure by humans, contamination of things such as water supplies, etc.). When I saw "greener" chip manufacturing process, I was initially thinking and hoping that this was what they were referring to, but lower power usage is obviously a nice benefit as well.
I was hoping for the same thing. One thing I heard years ago was how some chemical processes can use substit
slightest change- and you are novel ! (Score:5, Insightful)
Semiconductors, especially devices in nanometer scaling need to be extremely pure. Their lattice structure -hence their electrical effects- can easily be distorted or failed by very little deviations, say, in dopant concentrations random dopant fluctuations. This is shortly called , RDF.
RDF has become a major concern especially for the newcoming generations because basically when you scale down the channel length, the channel lengths are becoming so narrow (and small) that only about 100 hundred dopant atoms fall inside the channel volume. This , obviously, increases the sensitivity and failure rate of these transistors, let alone their variations (like threshold voltages) in a single die.
From a mass production point of view, we want to get as uniform parameters as we can from a complete die. The ratio of successful ( uniform and working ) transistors to the total die area divided by a single transistor area ( which means the total number of transistors we wanted to harvest from that die ) gives us the `yield`.
Now, taking into account the fact that even a failure of a single transistor, could lead to the failure of an entire word line of an SRAM , the yield strongly influences the SRAM or chip reliability.
And for the companies, it does not matter whether you prepare the chip at room temperature but in a more sloppy way, because ultimately it is going to cost more !
Of course the need for extreme purity in nanoscale devices is not realized completely. The reason is that we have not produced those chips yet. However, these issues ( especially RDF and process variations- you can google these and see yourself) are very hot topics in LOW POWER VLSI design.
The people who work in these fields are surely aware of the need for an accurate fabrication and will just ignore this kind of work. There are some papers that try to reduce these effects only to succeed in a relatively low way.
In modern research, you can easily publish a paper by changing the slightest detail of a published paper or you can slightly vary this known application and claim that you have come up with a totally novel ida.
This is a draw-back.
In short, they are not going to make anything green, UNLESS of course, they find a better and reliable method satisfying the needs of the upcoming nanoscale devices.
Then I would shut up
green? (Score:1)
Sort it out, BBC (Score:2)
How about we go with the complexity of integrated circuits, with respect to minimum component cost, doubles every 24 months.
Bit of a difference. Doesn't have a huge impact on the story, but come on - anyone who reports on tech issues should at least have a better grasp of the basics than your average Digg-er.
Re:Energy (Score:2)
A more important question is if this process produce the useless (for chips) low quality silicon that the old methods did. The solar power industry is currently heavily constraine
Progress! (Score:1)