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Subject:	Re: Long Term Storage of PCB's
From:	"ddhillma" <[log in to unmask]>
Date:	Mon, 18 Nov 96 09:15:35 cst
Content-Type:	text/plain
Parts/Attachments:	text/plain (50 lines)

     Hi Scott-
     
     Sorry but there is no industry "norm" for an allowable time for PWB 
     storage because of the variables involved. The type of atmosphere, PWB 
     finish type, finish thickness, PWB fabrication history, type of 
     soldering process, type of process flux, etc. - get the idea! The 
     TechNet community might be able to give you some specifics that can be 
     helpful (i.e. what type of "non controlled" environment are you 
     worried about?). You could give Doug Pauls an email ([log in to unmask]) 
     on some specific contamination case also. 
     
     
     Dave Hillman
     Rockwell Collins
     [log in to unmask]
     


______________________________ Reply Separator _________________________________
Subject: Long Term Storage of PCB's
Author:  [log in to unmask] at ccmgw1
Date:    11/18/96 4:28 AM


Does anyone know what is considered the industry norm for the allowable 
time one could store boards in an uncontrolled enviroment before 
concerns of oxidization or ionic contamination set in?  Is cleaning 
recommended prior to assembly on boards that have been stored for an 
extended period time?  Any and all feedback would be greatly 
appreciated.
     
Scott
     
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