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Subject:
Re: Assy: Solder Paste Height
From:
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Date:
Wed, 18 Sep 1996 09:50:48 -0400
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     There are several factors beside stencil thickness that can affect the 
     print thickness.  The distance between the stencil and the board is 
     important.  For stencils, I use as close to zero snap off as I can 
     get.  Your fixturing can also affect the print thickness.  If you do 
     not get adequate support under the board, the board can bow away from 
     the stencil during printing and effectively increase the snap off, 
     resulting in a thicker print.  I use drop in workholders for each 
     board that I am printing to minimize this effect.  I also found that 
     if I decreased the stencil release time, I got more consistent print 
     thicknesses.


______________________________ Reply Separator _________________________________
Subject: Assy: Solder Paste Height
Author:  [log in to unmask] at Internet
Date:    9/16/96 4:09 PM


 I am trying to determine the solder paste height based on stencil
thickness. I have noticed that with a 7mil stencil I am getting 
approximately 8mils of paste height using a metal squeegee blade 
regardless of pressure settings. Is this typical of the screen printing 
process??
     
     
     
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