Greg, everything is an "it depends" situation. 

There are many different ways in which material and process compatiblity 
can be demonstrated.  Two widely accepted methods are to use J-STD-001D, 
Appendix C, or to use the new IPC-9202 protocol.  Both are available from 
the IPC.  The 9202 is being printed now and should be available any day 
now.  It just passed ballot earlier this month.  I hope to have the 
companion IPC-9203 document, which explains 9202, done by the end of the 
year.  Then I may launch into IPC-9204, which explains the 9203.  Maybe 
not.

Doug Pauls



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[TN] "Compatibility" testing of fluxes






J-STD-001 states that fluxes with activity levels of L0 and L1 shall be 
used but other fluxes with other activity levels may be used as long as 
data is available "demonstrating compatibility".  Are there any standard 
"compatibility" tests or is this another one of those "it depends" 
situations.


Gregg Temkin
Principal Manufacturing Engineer
(425) 376-4429
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