Lois
One could skip the 4000 paper or after the 4000 skip the 6um paste. Apart of that I think the procedure is appropriate.

Best regards

Günter Grossmann
Scientist
Empa
Swiss Federal Laboratories for Materials Science and Technology
Überlandstrasse 129
8600 Dübendorf
Switzerland
Tel +41 58 765  4279
Fax +41 58 765 4054
[log in to unmask]
www.empa.ch


>-----Ursprüngliche Nachricht-----
>Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Louis Hart
>Gesendet: Dienstag, 30. Oktober 2012 16:26
>An: [log in to unmask]
>Betreff: Re: [TN] PWB laminate anomaly, Post Forced RW, BGA
>
>Victor, looking forward to the pictures. One comment I could make is it
>seems like there are a lot of steps in the grind and polish. Any other
>technetters have the same view?  Louis Hart
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
>Sent: Tuesday, October 30, 2012 11:22 AM
>To: [log in to unmask]
>Subject: [TN] PWB laminate anomaly, Post Forced RW, BGA
>
>Fellow TechNetters:
>
>   I have a cross section which has an unusual laminate anomaly.   I
>have seen this more prevalent on LF laminate and hybrids.   The anomaly
>can occur between small PTHs and areas without any hole.   All layers
>seem to be effected.   The numbers are not staggering but of a concern.
>The glass rods seem to break off/separate from the bundle/laminate.
>The medium grind procedure is 1000, 1200, 2400, 400, 6, 3, and 1
>microns slurry with final polish of 0.05 alumina.  I will upload a photo
>to Steve.
>
>Victor,
>
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