Edward

Nice to hear from you again.  If the standard sectioning equipment is not
satisfactory, I have developed a wax-mounted technique.  Using a wax called
Crystal Bond (it is a transparent wax with a good hardness), I mound a piece
of board with the vias on a cross-section mount.  Using a high accuracy
polishing tripod, use 600 grit sand paper and inspect periodically using a
microscope.  When you get close, use a higher quality sandpaper (e.g., 1,000
or whatever it is, I can't remember).   It takes about 20 minutes per
sample.  It is labor intensive, but it works nearly 100% when you are in
practice.  I found the parts at South Bay Technology in Anaheim, CA.  It is
a microscopy supply shop.

Carey
-----Original Message-----
From: edward edward szpruch <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Wednesday, December 08, 1999 7:36 AM
Subject: [TN] microsectioning equipment for microvias


>Hi technetters,
>As we are proceeding with our laser drilled blind microvias,we have more
and
>more problems with microsections.What is the recommended equipment for
>microsectioning of microvias , 75 and 100 micron diameter?
>regards
>Edward
>
>Edward Szpruch
>Eltek , Manager of Process Engineering
>P.O.Box 159 ; 49101 Petah Tikva Israel
>Tel  ++972 3 9395050 , Fax  ++972 3 9309581
>e-mail   [log in to unmask]
>
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