[SI-LIST] Re: DC Resistance calculation in 2.5D solver
- From: Cristian Gozzi <cristian.gozzi@xxxxxxxxx>
- To: emcesd@xxxxxxx
- Date: Wed, 16 May 2012 14:26:02 +0200
Dear Tesla
the most accurate one is the DC IR drop.
SIwave (and I guess also Sigrity PowerDC) use a 2D FEM Resistance solver
(including adaptive mesh based on Energy loss criteria):
it computes Resistance matrix for each plane, traces and optionally also on
VIAs (by defaults VIAs restistance are computed with a formula)
The AC solver (S-parameters) it is not optimized for DC and it extrapolates
DC value,
while IR DC solver computes it based on adaptive mesh and Energy error
criteria
If you wants more technical details insight these solver technology, please
contact your Ansys or Sigrity AE
Best Regards
Cristian Gozzi
Senior SI and PI Specialist
Technoprobe spa
2012/5/16 Tesla <emcesd@xxxxxxx>
> Hi, Experts
> In 2.5 field solver(eg: Sigrity or SIwave), if i want to get DC resistance
> of interconnect, i use the two method:
>
> 1 Use FEM to calcute from DC to Fmax Hz, use the DC s parameter to get the
> S parameter
>
> 2 Use IR drop in the analysis to get the DC resistance
>
> but the two method give two different DC resistance value, Which one i
> should trust?
>
> Thanks.
>
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