In a message dated 7/27/00 6:58:54 PM EST, [log in to unmask] writes:
<< First of all the pictures you show look pretty bad and
I don't believe I would ever ship something like
these. However, I want to point out that these may not
be 'rejectable'. >>
Hi Pete!
It sounds like you've seen this problem before, but I do have to question
your statement of it not being rejectable...
What concerns me with this condition is that there are all these little
bubble pockets that may, or may not, create little pockets for flux residues
or any other sort of contamination to collect that can't be cleaned. This is
aside the issue that you say everything is probably covered well with
soldermask.
Let me ask you, if you were an assembler (these boards go into geophysical
equipment...otherwise known as oil-well electronics, not downhole stuff
though) would you accept these boards and build them for your customer? BTW,
the picture called "barreldefect.jpg" at my freedrive is also another defect
that we've seen with these boards. That picture is of a PTH resistor network
hole (albeit the worst one we've found), but there also has been some "less
than desireable" barrels that I've seen.
Problem is, we're stuck between a rock and a hard place. We've been
inspecting every board as thoroughly as we can to try and get the pick of the
litter, because we must meet a committed delivery schedule. During wave we've
had pin-holes and blow holes that I think are because of the hole
quality...we've spent many hours of extra touch-up because of this.
When I see various issues (it's not just mask issues, or hole quality
problems, there's also boards that have SMT pads on fine pitch locations that
didn't wet with solder during HASL that were shipped to us), I just wanna
pull my hair out!! We get crap and are expected to turn it into gold...such
is the life at CEM's.
Didn't mean to dump on you, but this is what I deal with every single day. If
it's not a board problem, it's a component issue, if it's not that, it's a
B.O.M. problem, if it's not that, a machine is down...yada,yada,yada
Anybody got any Prozac?
-Steve Gregory-
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