Irving,
In October and November 2000, I wrote two articles for IPC Review on
cleanliness requirements in IPC and military standards.  The October
article was aimed at bare boards, the November article on assemblies.  They
are available from the IPC, along with other articles I have written on the
subject.  Jack Crawford tells me you can find those papers here:

http://files.ipc.org/cleaning_papers.zip

As for determining how clean YOUR assemblies need to be for YOUR
application and end use environment, that is still up to you to determine.
Both Brian Ellis and I have written on the topic (ad nauseum) and a search
through the IPC archive would be beneficial to you.

As for the length of a string, I keep tellin' ya, it's 8.4 cm.  I have it
sitting right here in front of me.

Doug Pauls
Rockwell Collins.




                      Irving Lee
                      <Lee.Irving@INVEN        To:       [log in to unmask]
                      TEC.COM>                 cc:
                      Sent by: TechNet         Subject:  [TN] Ionic contamination of PCA
                      <[log in to unmask]>


                      08/31/2004 01:11
                      AM
                      Please respond to
                      TechNet E-Mail
                      Forum; Please
                      respond to
                      Lee.Irving







Does someone have any idea for the ionic contamination criteria on PCBA ?


Best regards

Irving Lee

QA,EBG Inventec

+886-3-3900000 ext 2164
+886-9100-79999
[log in to unmask]



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