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Regarding CNTFET's

J

jay496

New member
Hi, I have few doubts regarding CNTFET could anyone please clarify them... Is CNTFET a existing technology..??? What are companies & products which using this CNTFET technology.?? Thanks, jay
 
jay496 said:
Hi, I have few doubts regarding CNTFET could anyone please clarify them... Is CNTFET a existing technology..??? What are companies & products which using this CNTFET technology.?? Thanks, jay
Click to expand...

AFAIK CNTFET is still in research phase and far from production stage.
 
Google has a lot to say about CNTFET but I have seen or heard nothing about it from the foundries as of yet. It is not on the road map which includes 7nm.
 
jay496 said:
@Staf_verhaegan Ohhh... its still in research. Thank you ... :)
Click to expand...

But it is fascinating though...
First of the problems is to get the CNT at the places you need them. Second problem is that not all CNTs are acting as semiconductors and some are just metallic. So they are developing techniques to literally burn away the metallic CNTs that don't act as transistors. etc.
When I was still in technology a few years ago here at imec they were more focusing on using CNT for low resistance interconnects then for transistors.
 
CNTFETs have multiple issues:

1. Problems aligning the transistors
2. Separating semiconducting vs. metallic nanotubes
3. Controlling the diameter of nanotubes
4. Making a gate all-around structure for nanotubes
5. Good source drain contacts to the tubes (Schottky barriers at S/D cause a lot of problems)

Based on transistor requirements for the next 5-10 years, nanotubes do not seem to be a very good option. Comparitively FinFETs, high mobility fins, nanowires etc. seem to do a much better job. I highly doubt that they'll ever be used as transistor channel material.
 
I thought it was evident, but no. CNTFET (correcting my earlier typo where I'd written FinFETs) transistors are not in production and its highly unlikely that they will be used in the near future. They are being considered for other applications (like interconnects, mentioned before).
 
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saurabhr8here said:
I thought it was evident, but no. FinFET transistors are not in production and its highly unlikely that they will be used in the near future. They are being considered for other applications (like interconnects, mentioned before).
Click to expand...

Don't know, if I missunderstand saurabhr8here. But FinFETs are in every i3, i5, i7 (ivy bridge) CPU right now.
Silicon FinFET Technology aka trigate Technology (intel): Intel® 22nm Technology
Simulation results: Gold Standard Simulations Ltd. :: Simulation analysis of the Intel 22nm FinFET
 
That was a very silly typo :(, I meant CNTFETs and not FinFETs. FinFETs are being used in all Intel products and most of their competitors are working on introducing them at 16/14nm node. Apologies!!!
 
@all, Thanks everyone for clearing my queires...
@Daniel Thanks a lot for semiwiki.. I learnt lot of stuff from this...
 
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