In a message dated 11/30/98 3:34:45 PM Pacific Standard Time,
[log in to unmask] writes:
<< Address,
I have a PCA that was once routed using a phenolic base (Jig). The
base and Router are no longer available. The fix is to score the
panels prior to assembling.
The immediate need is, "How do I depanel existing PCAs?" Again, the
panels have NOT been scored and the router/base are not available. Is
it possible to score the PCA with components loaded? I could then use
a depanelizer such as CAB. Alternatively, could I use a skip Router
for depaneling PCAs?
This is a .028, std. 1 x 4 array, PCMCIA application. Any advice as
well as service bureaus to perform any of the above or any other
suggestions. Preferably someone local to Dallas, TX.
John Gulley
>>
Hi John!
I know somebody that'll do it out here in California, did the same thing
for me one time with loaded boards. We were building Toshiba laptop memory and
the score job wasn't checked on the fabs when we recieved them. Got the boards
built but couldn't singulate them without flexing the boards big time because
of the insufficient score depth, and I was worried that we would fracture
solderjoints it was that bad.
Called quite a few fab shops around here but couldn't find anybody at
first that wanted to do the job. Couple of problems, nobody had the kind of
scoring equipment that had enough clearance to score a loaded board.
Apparently the newer generation scoring machines need more clearances than the
older machines did, and make it difficult (if it can be done at all) to score
populated fabs.
The other problem was that many shops aren't really ESD safe back in
their scoring and routing areas...they don't need to be either, copper and
fiberglass the last time I checked, wasn't ESD sensitive.... :^)
The shop I found is "Onanon"....(408) 262-8990, ask for Dennis Johnson.
The shop is out here in Milpitas, California. All they do is route, score, and
drill. Dennis set-up one of his older machines for me, and grounded the area
around the scoring machine to do the job...couldn't ask for more.
-Steve Gregory-
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