Why don't you try with silver conductive paint? Auto shops use it
for repairing rear window heaters and some are advertised for
repairing printed circuit boards. probably you need to glue the
problem area to a stiff back before repairing.
Or if the flex circuit is heath resistant you could use the solder
paste with a hot air station.
Just an idea,
Ignacio
El 17/02/2016 a las 3:09, Peter
Gottlieb
hpnpilot@... [hp_agilent_equipment] escribi¨®:
?
I have a challenging soldering job and am looking for
advice from someone who's
tackled something like it before.
I have a modern high-end device which has a complex and
unobtainable custom LCD
display. This display connects via a flex circuit to a
connector on the main board.
Unfortunately, the mechanical design is not great and
where the flex circuit
attaches to the LCD glass there is no strain relief so a
couple of flexes and
several traces broke. These traces are approximately 4
mils wide, spaced 4 mils
apart. Under a stereo microscope I was able, using a new
X-acto knife and VERY
gently, scrape off the insulation on each side of the
broken traces. I secured
under the movable part with some cyanoacrilate. I now need
to solder perhaps a
wire across the broken traces. Using some surface mount
paste (looks like BBs
under the microscope) I managed to tin the traces but my
soldering tip looks
like I'm using a copper roofing iron, and that's after I
sharpened it to what
looked like a super fine point. Heck, at 40X even a pin
looks rounded. #30
wirewrap wire is far too large but I did find some perfect
wire strands from
some superflex silicone RC wire. It reads 3.5 mils dia on
my micrometer.
So, this seems like a tough job but I did get one piece on
after several tries.
Has anyone who has successfully done something this have
any pointers? Is there
an iron meant for this kind of micro work? Things I should
or shouldn't do?
Peter
Este correo electr¨®nico se ha enviado desde un equipo libre de virus y protegido por Avast.
|
