[SI-LIST] Re: I have a question related package parasiticextraction.

From: "Patrick Zilaro" <pzilaro@xxxxxxxxxxxx>
To: realbalm <realbalm@xxxxxxxxx>, si-list@xxxxxxxxxxxxx
Date: Mon, 8 Dec 2003 20:16:11 -0800
Take a look at the following text for a more in-depth explanation:
Digital Signal Integrity Modeling and Simulation with Interconnects and
Packages,
Brian Young, Prentice Hall, 2001, pp. 197-198.

Hope this helps,

Patrick
  -----Original Message-----
  From: realbalm [mailto:realbalm@xxxxxxxxx]
  Sent: Monday, December 08, 2003 7:54 PM
  To: pzilaro@xxxxxxxxxxxx
  Subject: Fwd: RE: [SI-LIST] I have a question related package parasitic
extraction.


  Patrick,

  Sorry for my typo.
  Please let me know the helpful reference about that "This is because each
segment of the structure interacts with the rest of the segments.".

  Regards,

  Ki-Don

  realbalm <realbalm@xxxxxxxxx> wrote:
    Date: Mon, 8 Dec 2003 18:41:59 -0800 (PST)
    From: realbalm
    Subject: RE: [SI-LIST] I have a question related package parasitic
extraction.
    To: Patrick Zilaro


    Patrick,

    Thanks very much for your help.
    Because I have never heard "This is because each segment of the
structure interacts with the rest of the segments.", I'm glad to know the
helpful reference about that.

    Best Regards,

    Ki-Don

    Patrick Zilaro <pzilaro@xxxxxxxxxxxx> wrote:
      KD,

      There is nothing wrong with the commercial solver. Even if you were to
      simulate a planar structure such as a trace, you would see that the
"parts"
      do not add up to the "whole". For example, if you simulated a 5mm
trace and
      a 10mm trace using the exact same stack-up, etc. you would find the
      following:

      1) capacitance -> 2*5mm trace should be pretty equal to 10mm trace
      2) (ac) resistance -> 2*5mm trace should be less than the 10mm trace
      3) inductance -> 2*5mm trace should be even more less than the 10mm
trace

      This is because each segment of the structure interacts with the rest
of the
      segments. So be careful, when you break up a problem, especially since
you
      are introducing error on the optimistic side (where you usually would
prefer
      to be on the pessimistic side).

      Regards,

      Patrick

      -----Original Message-----
      From: si-list-bounce@xxxxxxxxxxxxx
      [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of KD KIM
      Sent: Monday, December 08, 2003 3:59 PM
      To: si-list@xxxxxxxxxxxxx
      Subject: [SI-LIST] I have a question related package parasitic
      extraction.


      Dear all,
      I have a question and be happy to write to you.

      I have simulation the structure composed of only one bonding wire and
one
      lead,
      using FEM commercial solver, Ansoft Spicelink like below for
extraction
      parasitic values,
      R, L, and C.

      I have simulated for below three cases.

      1. the structure contained only one bonding wire
      2. the structure contained only one lead
      3. the structure composed of one wire and one lead

      I think the value for case 3 equal to the values case 1 added case 2.
      But the result was not. The difference was about 16% for the
Resistance.
      Of course, other parasitic values also have some differences
considerably.
      Is this difference resulted from the defect of the FEM commercial
solver?
      I want to know that what do you think about it?
      Please reply to my e-mail.


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[SI-LIST] Re: I have a question related package parasiticextraction.

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