Agree strongly with Susan. pull away of hole wall, and caused by a
mechanical process after plating, although on one hole at lower left you can
see it deeper. Also, the hole plating is visible around the hole. and all
the defects are in the same direction- caused by some external process.
Gaby
----- Original Message -----
From: "Bissonnette, Jean-Francois" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, January 09, 2004 10:32 PM
Subject: [TN] Inner Wall Defect


> Hi technetters,
>
> We recently received flex cables with PTH that have holes blocked by some
> kind of solder
> webing.  I've asked Steeve Gregory to post them on his web site.  I would
> like to have
> opinions from the experts out there.  Even though the supplier has been
> asked many times
> to correct the process the flex circuits often have that defect... Any
idea?
>
> The pictures are at:  http://www.stevezeva.homestead.com under Inner Wall
> Defect.
> Thanks!
>
> Jean-François Bissonnette
> Vérificateur, Contrôle de la Qualité
> Électronique
> Produits et Procédés
> Vapor Rail Inc.
> 10655 Henri-Bourassa O.
> St-Laurent, Qc
> H4S 1A1
>
> (514) 335-4200 x2021
> (514) 335-4231 fax
>
>
>
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