At 09:09 24/12/97 +0200, you wrote:

I think you may slightly confusing the meteological term ISOBAR as the
constant T curve. I would go along with the answer of an Isotherm being a
partly isolated thermal releif pad used on inner layer power and ground and
also seen on external layers.

Anyway, have a great Xmas and a happy new year.

>Not bad as an answer.
>
> A slightly more technical definition  would be: An isotherme is a curve
>along which the temperature T is constant. Kinetic gas theory describes it
>in more details for the amateur physicist.....
>
>Best wishes for a very peaceful Christmas to everybody on TN.
>J?rg
>
>Maybe you remember older wheather forecasts pictures. They showed
>isothermes, these funny shaped bananas...
>
>
>
>
>[log in to unmask] on 24-12-97 01:39:24 AM
>
>Please respond to [log in to unmask]; Please respond to [log in to unmask]
>
>To:   [log in to unmask]
>cc:    (bcc: Jorg Richstein/GENEVA/LECROY)
>Subject:  Re: [TN] heeelp - NON-THERMAL RELIEVED VIAS AND COPPER PLANES
>
>
>
>
>Since there probably aren't too many of us left on the `Net at this hour of
>the California day, I'll take a crack at it: An isotherm is another term
>for thermal relief.
>
>HAPPY HOLIDAYS TO ALL THOSE WHO HAVE KEPT US INFORMED OVER THE `97 YEAR!!
>LOOKING FORWARD TO MORE OF THE SAME IN `98!!
>
>
>
>
>
>
>[log in to unmask] on 12/23/97 04:37:27 PM
>
>Please respond to [log in to unmask]; Please respond to [log in to unmask]
>
>To:   [log in to unmask]
>cc:    (bcc: Tom Bresnan/Multek/DIIG)
>Subject:  Re: [TN] heeelp -  NON-THERMAL RELIEVED VIAS AND COPPER PLANES
>
>
>
>
>Can any one explain what is isotherm pattern and what are the advantages of
>having it on fab?
>Merry Christmas to all you and your family.
>re,
>ken patel
>At 09:25 PM 12/21/97 -0500, D. Rooke wrote:
>>In addition to Werner's comments, I would suggest that if your fracturing
>>occurs exclusively on the oxide side of your via to barrel interface, your
>>oxide process may not be optimum for this type of product design.
>>
>>Challenge your designer and inquire why no isotherm pattern is used.
>>
>>Dave Rooke
>>Viasystems Canada
>>
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>______________________________________________________
>Ken Patel                       Phone:  (408) 490-6804
>575 Cottonwood Dr.              Fax:    (408) 490-6859
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Look, I can wiggle my ears!
@
:-)
@

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