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September 2005

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Subject:
Microvia Puzzle
From:
Lawrence Russell <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Mon, 12 Sep 2005 08:44:27 +0800
Content-Type:
text/plain
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text/plain (20 lines) 
Stephen,

Could you please post this microsection on your website?
The question is what could cause this on a CO2 laser drilled, Neopact and RPP blind via?
We are getting all sorts of opinions, from desmear problem to poor metalization to DI water inadequate or chemical imbalances.
Any useful suggestions would be appreciated, as it has happened more than once , but irregularly.

Larry Russell
 <<ole0.bmp>> 

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