Resistivity vs Temperature

N

Naveen Kumar

Guest
Hello group,

I would like to simulate resistivity of a metal wire of a particular
length with temperature and see how it actually varies. I was just
wondering how to go about doing with this simulation.

Does cadence have this resistivity option at all? Can I just simulate
a metal wire in the layout editor?

Thanks for your time,
Naveen
 
Naveen Kumar wrote:
Hello group,

I would like to simulate resistivity of a metal wire of a particular
length with temperature and see how it actually varies. I was just
wondering how to go about doing with this simulation.
Click to expand...
Surely the simulation will just give you whatever thermal coefficient of
resistivity is programmed into the simulator for the material you are
using. If the simulator isn't very sophisticated then that's likely to
be just a single number and may not bear much resemblance to reality
if the material has a TCR that varies with temperature itself.

Stewart
 
Thankyou very much for the reply Stewart. I was just wondering if
spectre/eldo can possibly simulate resistivity of a metal wire (Metal6/
metal7 Cu wire at 65nm technology node from a particular vendor) with
respect to temperature. Since resistivity varies with temperature I
believe spectre should have those equations with in through which it
should do that. But I am not sure, how to go about doing this. Can any
noble soul throw some light on this.

Thanks,
Naveen.

On Jun 11, 2:39 pm, Stewart Smith <nos...@ee.ed.ac.uk> wrote:
Naveen Kumar wrote:
Hello group,

I would like to simulate resistivity of a metal wire of a particular
length with temperature and see how it actually varies. I was just
wondering how to go about doing with this simulation.

Surely the simulation will just give you whatever thermal coefficient of
resistivity is programmed into the simulator for the material you are
using.  If the simulator isn't very sophisticated then that's likely to
  be just a single number and may not bear much resemblance to reality
if the material has a TCR that varies with temperature itself.

Stewart
Click to expand...
 
On Jun 17, 4:50 am, Naveen Kumar <solidrepell...@gmail.com> wrote:
Thankyou very much for the reply Stewart. I was just wondering if
spectre/eldo can possibly simulate resistivity of a metal wire (Metal6/
metal7 Cu wire at 65nm technology node from a particular vendor) with
respect to temperature. Since resistivity varies with temperature I
believe spectre should have those equations with in through which it
should do that. But I am not sure, how to go about doing this. Can any
noble soul throw some light on this.

Thanks,
Naveen.

On Jun 11, 2:39 pm, Stewart Smith <nos...@ee.ed.ac.uk> wrote:

Naveen Kumar wrote:
Hello group,

I would like to simulate resistivity of a metal wire of a particular
length with temperature and see how it actually varies. I was just
wondering how to go about doing with this simulation.

Surely the simulation will just give you whatever thermal coefficient of
resistivity is programmed into the simulator for the material you are
using.  If the simulator isn't very sophisticated then that's likely to
  be just a single number and may not bear much resemblance to reality
if the material has a TCR that varies with temperature itself.

Stewart
Click to expand...
Stewart answered your question. Spectre can simulate a resistor with
constant TC for a given material at a given temperature or for a
temperature sweep (interval) . Your piece of metal is then more or
less "idealized" resistor. Look at the spectre's "physical resistor"
model. This model assumes static/balanced temperature steady state. I
don't think that any self-heating effects are simulated. If you need a
material simulation (temperature field or gradient), you don't need a
circuit simulator but MatLab or other similar tool.
 
Hi naveen,
I would suggest you to look into the tech files provided by the fab
vendor...
Dont believe the tool(after all it is a software written by humans)..
I hope you can find all the details about the process in the
technology document/....
Regards,
lokesh rajendran.


On Jun 21, 5:02 am, momchil <M.Mi...@gmail.com> wrote:
On Jun 17, 4:50 am, Naveen Kumar <solidrepell...@gmail.com> wrote:



Thankyou very much for the reply Stewart. I was just wondering if
spectre/eldo can possibly simulate resistivity of a metal wire (Metal6/
metal7 Cu wire at 65nm technology node from a particular vendor) with
respect to temperature. Since resistivity varies with temperature I
believe spectre should have those equations with in through which it
should do that. But I am not sure, how to go about doing this. Can any
noble soul throw some light on this.

Thanks,
Naveen.

On Jun 11, 2:39 pm, Stewart Smith <nos...@ee.ed.ac.uk> wrote:

Naveen Kumar wrote:
Hello group,

I would like to simulate resistivity of a metal wire of a particular
length with temperature and see how it actually varies. I was just
wondering how to go about doing with this simulation.

Surely the simulation will just give you whatever thermal coefficient of
resistivity is programmed into the simulator for the material you are
using. If the simulator isn't very sophisticated then that's likely to
be just a single number and may not bear much resemblance to reality
if the material has a TCR that varies with temperature itself.

Stewart

Stewart answered your question. Spectre can simulate a resistor with
constant TC for a given material at a given temperature or for a
temperature sweep (interval) . Your piece of metal is then more or
less "idealized" resistor. Look at the spectre's "physical resistor"
model. This model assumes static/balanced temperature steady state. I
don't think that any self-heating effects are simulated. If you need a
material simulation (temperature field or gradient), you don't need a
circuit simulator but MatLab or other similar tool.
Click to expand...
 
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