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fatslob-:O on 22 September 2013
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TheJimbo1234 said:
fatslob-:O said:
TheJimbo1234 said:
fatslob-:O said:
TheJimbo1234 said:

Yes, that is right, but when the trans double, normally the proc power doubles at the same time. Graphene would demolish this as you could have a chip with less transistors still utterly outstrip a current proc. making Moores Law useless.

Graphene requires far less power and is highly resistant to heat, also you don't need mass power to clock at that speed as you are not looking at fermi levels to overcome (uses "negative resistance").

Basically using this negative resiatance, they made something that works essentially the same as a XOR gate, but takes up far less room than a current XOR and they only needed 3 of these negative resistance transistors to make one.

http://www.extremetech.com/extreme/164301-graphene-transistors-based-on-negative-resistance-could-spell-the-end-of-silicon-and-semiconductors

Essentially, we are all going to have to go back to uni to relearn fundemental circuit or proc design when these bad boys come out.

A couple of things to keep note about graphene cricuits is that they don't provide enough bandgaps for digital signals.


And that is the key - you don't use the bandgap as graphene is not a semiconductor .

  This was the problem they had with graphene as it either conducts really well, or really really well and no doping could solve it. The breakthrough is the negative resistance. You use that instead of you standard bandgap semiconductor method. The result is something which has logic output due to a large enough potential difference at the output. 

I thought negative resistors were theoretical ?

What happens if they don't find a real solution to the bandgap ? (Well there's bilayer graphene to do it to solve the bandgap issue.)

Read the link ^^. ANd it is not "negative resistors" but negative resistance, plus it has actually been made and works. Now all they need to do is work out how to mass produce it and make a prototype cpu.

The issue with resonant-tunneling diodes is that they need to have a lower energy potential well than the electrons otherwise it starts acting like a normal diode again.