Re: [SI-LIST] : Plane short

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From: Ritchey Lee (leeritchey@earthlink.net)
Date: Tue May 01 2001 - 04:31:12 PDT


Clever method!

Lee

Scott McMorrow wrote:

> Subas,
>
> Here's one approach that I have used in the past.
>
> Take a current limited programmable power supply and
> attach it to the power planes.
>
> Take a can of freeze spray and spray down the entire
> backside of the board until it is covered with frost.
>
> Slowly turn on the power supply and increase the current.
>
> The area of the short will heat up most quickly and melt
> the frost. Once you focus in on the general area, you should
> be able to repeat the proceedure until there is only a
> small area for you to look. Then you can go to the
> gerbers and find the most likely short site if it is inside the
> board, or remove the part that is hiding the solder short.
>
> regards,
>
> scott
>
> --
> Scott McMorrow
> Principal Engineer
> SiQual, Signal Quality Engineering
> 18735 SW Boones Ferry Road
> Tualatin, OR 97062-3090
> (503) 885-1231
> http://www.siqual.com
>
> "Bastola, Subas" wrote:
>
> > What is the best method to find the location of a short between the power
> > and gnd plane in a fully assembled board? Can TDR help?
> >
> > Subas Bastola
> > Intel
> >
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