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sputtering simulation(hot topic)

Posted 13 févr. 2012, 01:53 UTC−5 6 Replies

Khan Salman
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had anyone done a simulation on sputtering?...mainly the magnetron sputtering?....any idea how do i start?....thanks
6 Replies Last Post 10 déc. 2015, 08:08 UTC−5
Daniel Smith COMSOL Employee

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Posted: 1 decade ago 13 févr. 2012, 09:01 UTC−5
Hi, it is not really possible to model a magnetron in COMSOL. This is because COMSOL uses a fluid model for the transport of electrons and ions. The ratio of the parallel field to cross field to electron mobility is very high, 10^8 or higher. Fluid models can't really handle such extreme anisotropy. Therefore, I don't think it will be possible to model a magnetron using COMSOL.
Hi, it is not really possible to model a magnetron in COMSOL. This is because COMSOL uses a fluid model for the transport of electrons and ions. The ratio of the parallel field to cross field to electron mobility is very high, 10^8 or higher. Fluid models can't really handle such extreme anisotropy. Therefore, I don't think it will be possible to model a magnetron using COMSOL.
Edgar Kaiser
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Posted: 1 decade ago 13 févr. 2012, 09:31 UTC−5
Daniel,

so the magnetic confinement of electrons is one difficulty in this case. But let's assume we look at a sputtering process that is not magnetically enhanced.
How would we approach the sputtering process itself, i.e. a fast ion crashing onto the cathode and kicking out atoms, molecules or clusters?

Could this be done by COMSOL some way? Or are we restricted to just modeling the discharge.

Cheers
Edgar

Daniel, so the magnetic confinement of electrons is one difficulty in this case. But let's assume we look at a sputtering process that is not magnetically enhanced. How would we approach the sputtering process itself, i.e. a fast ion crashing onto the cathode and kicking out atoms, molecules or clusters? Could this be done by COMSOL some way? Or are we restricted to just modeling the discharge. Cheers Edgar
Daniel Smith COMSOL Employee

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Posted: 1 decade ago 14 févr. 2012, 08:57 UTC−5
Hi, you can model the sputtering process without the magnetic enhancement by supplying an appropriate surface chemical mechanism. This model does this for a deposition process:

www.comsol.com/showroom/gallery/9663/

Sputtering would be the opposite, in the sense that material is being removed from the surface rather than deposited, but the model could be set up in the same way.
Hi, you can model the sputtering process without the magnetic enhancement by supplying an appropriate surface chemical mechanism. This model does this for a deposition process: http://www.comsol.com/showroom/gallery/9663/ Sputtering would be the opposite, in the sense that material is being removed from the surface rather than deposited, but the model could be set up in the same way.
Khan Salman
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Posted: 1 decade ago 14 févr. 2012, 22:49 UTC−5
Hi.

So it seems only CVD kind of process is possible to perform the simulation....all i want to observe is the sputtering uniformity on the target, which i understand is highly dependent on strength and shape of the field. Is there any other alternative?

Sorry i am new in this field.
Hi. So it seems only CVD kind of process is possible to perform the simulation....all i want to observe is the sputtering uniformity on the target, which i understand is highly dependent on strength and shape of the field. Is there any other alternative? Sorry i am new in this field.
Khan Salman
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Posted: 1 decade ago 15 févr. 2012, 02:24 UTC−5
Just wanna add....i am very excited about this simulation :)

Correct me if i'm wrong..but from my understanding using the built in function in comsol we can obtain the density and energy of electrons in mag. field....(thinking about Lorentz, Hall effect and Larmor radius)...thus energy of ions formed to the target can be predicted...

Using Yamamura or Sigmund equation we can obtain the sputtering yield...and their trajectory for deposition.

Or it is not as easy as it seems?...
Just wanna add....i am very excited about this simulation :) Correct me if i'm wrong..but from my understanding using the built in function in comsol we can obtain the density and energy of electrons in mag. field....(thinking about Lorentz, Hall effect and Larmor radius)...thus energy of ions formed to the target can be predicted... Using Yamamura or Sigmund equation we can obtain the sputtering yield...and their trajectory for deposition. Or it is not as easy as it seems?...
Lukas Alberts
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Posted: 9 years ago 10 déc. 2015, 08:08 UTC−5
Hello,

any update on this topic?

I feel we need also some more stringent formulation of secondary electrons in the normal DC plasma?

greetings from germany
lukas
Hello, any update on this topic? I feel we need also some more stringent formulation of secondary electrons in the normal DC plasma? greetings from germany lukas

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