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August 2008

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Subject:
From:
Ted Kong <[log in to unmask]>
Reply To:
Date:
Fri, 22 Aug 2008 09:22:04 -0700
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text/plain
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Hi Vic,

Who can I send the picture to?

Ted


--- On Fri, 8/22/08, Victor Hernandez <[log in to unmask]> wrote:

> From: Victor Hernandez <[log in to unmask]>
> Subject: Re: [TN] Measling
> To: [log in to unmask]
> Date: Friday, August 22, 2008, 7:27 AM
> A photo is worth one thousands words.
> 
> Vic,
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Pete
> Houwen
> Sent: Friday, August 22, 2008 8:31 AM
> To: [log in to unmask]
> Subject: Re: [TN] Measling
> 
> Ted,
> 
> Measling occurs in the laminate itself and doesn't
> affect the
> soldermask.  If 
> you are concerned about the mask, is it blistering, not
> measling?
> Measling will 
> be white dots in a pattern.   It's usually caused by
> thermal stress.
> The fiber 
> bundles separate at their intersections.  It's not
> uncommon, and
> generally 
> harmless if it's localized.   If what you are seeing is
> not a white spot
> pattern, 
> but random, it might be mask blistering, in which case you
> could have a 
> problem if it allows conductors to be exposed as mask
> flakes off.  How
> much 
> do you trust your vendor in reporting results of their tape
> test (if
> they did 
> one)?
> 
> Pete
> 
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