Susan,
Thanks, I forgot that the revised test was in the D rev
of 840.
Don
Vischulis
Remeber that the test methods have only how to do the
tests and not what results or values would be acceptable. That info is
found in the specifications.
The solder mask specification
IPC-SM-840 changed the basic cure requirements in 1996 to represent what was
used on the board - so the items that determine cure are isoproply alcohol/water
solution, D- limonene, detergent, methanolamine and water. The samples are
also suppose to withstand soldering processes and be resistant to solder
sticking to the solder mask.
There is no differentiation between types of
solder mask.
Would recommend that you get a copy of 840. Sometimes
when samples are "rejected" for not meeting a test that is not in specs and
standards, there is a lot of confusion. Of course if you put on your
purchase order that the boards submitted have to meet your acetone test, you
would have no legal problems.
Susan Mansilla
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