Having written most of both, let me give it a shot.

5704 gives you recommended cleanliness requirements for bare/unpopulated 
printed circuit boards as measured by ion chromatography.  It essentially 
duplicates Delphi's C-7000 cleanliness specification that has worked well 
for over a decade.  It does not claim that if your boards meet these 
levels that they will be good for all processes, all applications, all end 
environments, for ever and ever, Amen.  But, it is a darn good place to 
start until your own testing tells you better.  Certainly a vast 
improvement over ROSE.

5702 was written to give guidance to OEMs guidance on determining how 
clean boards and assemblies need to be for their applications.  Meant more 
for general education. 

Both brilliantly written.  Must now type one handed as I have dislocated 
my shoulder patting myself on the back.  In reality, both documents were 
significantly improved through the inputs of the 5-32c and 5-32a IPC 
working groups.

Doug Pauls
Rockwell Collins
Delusional Engineer




"Glidden, Kevin" <[log in to unmask]> 
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02/01/2010 08:51 AM
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[TN] IPC-5702 / IPC-5704






Happy Monday everyone.....

Can anyone comment on how the newly released IPC-5704 ""Cleanliness 
Requirements for Unpopulated Printed Boards" and the 2007 release of 
IPC-5702 "Guidelines for OEMs in Determining Acceptable Levels of 
Cleanliness of Unpopulated Printed Boards" are meant to work together? 
I've not yet read the new 5704, so this is just a general inquiry......

Thanks!
Kevin

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