In a word, "No!". I can't imagine the finish you would get, or the trouble
you'ld have to go to to get a good finish - unless you could palletise it.
BTW, any chance of killing the jolly music that comes on when I go to your
picture site? I work in a quiet(ish) office, and it fairly makes folks jump
when I fire up the site. Yes, I could turn off the PC's sound, but I use it
to alert me to meetings and in-coming mail. Would appreciate it.
Cheers m'dears.
Peter
Steve Gregory <[log in to unmask]> 23/10/2002 04:07 AM
Sent by: TechNet <[log in to unmask]>
Please respond to "TechNet E-Mail Forum."; Please respond to SteveZeva
To: [log in to unmask]
cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group)
Subject: Re: [TN] Solder UNDER Soldermask Accept/Reject Criteria?
Hi Bill,
You wanna' see one that slipped by me? Go to:
http://www.stevezeva.homestead.com
and look at "Would you wave this?". This also is a board that's been built
here before, but the last time it was built was in the early 90's. The last
time the work instructions were updated was 1992, according to the revision
history on the cover page. I told the M.E. that's responsible for it now
(the one who originally wrote the work instructions is long gone), that I
think he should change the work instructions and not wave this board...he
asked me why. Told him him; "Trust me, you're better off hand-soldering the
through hole.
The picture is the bottomside of the fab...it's mixed technology, not a
whole lot of through-hole, basically right angle connectors at the end, a
PTH filter, and some axial stuff.
Would YOU wave this assembly?
-Steve Gregory-
I guess I should clarify also that this is a board that has been made for
years. Without the soldermask coming in over solder. The board has been
around more than 10 years and this was a shock to the manufacturing folks
when it happened... we just don't see this sort of thing happen
anymore.... I think the last time I saw this was in 1985. We all learned
to call out SMOBC to get the vendors to avoid making the boards with
solder under the soldermask. In fact, it took some convincing of some
engineers that the board would be fine without a solder coat over the
entire copper surface, and that they only needed the solder where the
component lead was...
I'm sure there are some of you guys that are my age (46) that remember
this stuff... its just so surprising to see it in this day and age... :)
Bill Brooks
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