When I worked at the manufacturer, we built these
FR-4 carriers,
similar to what Steve described.
We made a panel, slightly larger then the flex
panel and recessed
the entire area where the flex circuit laid. There
were webs forming
a window frame, where the flex boards connected for
support then
after having cut out the area where the flex boards
needed exposed.
this gave the look of a window.
Starting with a .062 material, we milled the
carrier portion down to
.031 or a little less, depending upon the span, or
size of the carrier.
----- Original Message -----
Sent: Thursday, October 23, 2003 9:25
AM
Subject: Re: [TN] Flexible circuit
assembly
Here are a couple of suggestions: 1) you could use an FR-4
template with a
cavity in it to hold the flex in a pallet 2) the "floppy
end" could be
partially die cut and the rest of the part left tabbed in
then you could
snap it/ cut the flex tabs after assembly. Most fixturing
does not have to
be complex. If you want to contact me off line you may -
we do '000's of
parts like this daily. Regards Steve
Kelly
-----Original Message-----
From: TechNet
[mailto:[log in to unmask]] On Behalf Of Jack C. Olson
Sent: Thursday, October
23, 2003 10:11 AM
To: [log in to unmask]
Subject: [TN] Flexible
circuit assembly
I need some advice from the assemblers out
there.
I'm designing a flex with LEDs/stiffener on half of
it, and
exposed rectangular pads at the floppy end.
kind of
like:
[O=O=O=O=O=O]=============E
Our typical designs are
rigid flex, and I usually
panelize them with break-away rails attached to
the
rigid portion, which we remove afterwards.
Maybe I just haven't
had my coffee yet, but I can't
think how to panelize a long floppy like the
one above?
We don't get the bare boards one-up do we?
There has to
be a way to support them for automated
assembly, right? Do you make a
fixture or something?
We do NOT want to hand-assemble
these!
Jack ("early fog, burning off by
noon")
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