Hi Hope,

We haven't been doing BGA's ...yet, but they ARE coming! We have purchased
an advanced rework station for prototyping and development.  If you must
continue to do hand placement (or even machine placement, for that matter)
you might want to make your small corner "brackets" in etch, rather that in
silk screen. That would be much more accurate and repeatable.

Good luck,

Charlie B.





Hope Lariosa <[log in to unmask]> on 07/22/99 12:05:04 PM

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 Subject: [DC] BGA Assembly by hand









Hello out there!

Has anyone had any experience placing BGA parts by hand?  I've been told
there has been mention of purchasing an automatic pick and place machine
for our in-house assembly shop but for now we have been manually placing
SMD parts by hand and using a reflow oven.  Obviously, there are issues
with BGA's, mainly, how do you know you've placed the part correctly?
Other than the silkscreen outline, it's pretty much a blind guesstimate.

Any input would be greatly appreciated.





Hope Lariosa
NASA Dryden Flight Research Center
Phone (661)258-3663
Fax     (661)258-2842
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