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Hi, Ajit,

With that sort of pitch, I think you could consider hot bar soldering. The
machines aren't desparately expensive and pay for themselves quite quickly
as they solder all joints at once, saving significantly on operator time.
If you haven't used this type of soldering before you might have to get
your QA on your side as the form of the solder joints is quite different
from more "conventional" joints and will require different
acceptance/rejection criteria.

In my previous Company, we started to use this method for soldering flexi
wrapover and wrapunder connectors to boards that fitted in pairs to cold
walls to form a cassette. It was very successful, and these connectors had
about 200 pins per side. The product was for the Eurofighter, so long-term
reliability was definitely an issue we had to consider. I'm sorry, I can't
actually give you the make and model we bought.

Regards

Pete Duncan




                    Ajit Jain
                    <akj@SECUREME        To:     [log in to unmask]
                    TERS.COM>            cc:     (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group)
                    Sent by:             Subject:     [TN] Soldering 36 pins LCD by flat tip
                    TechNet              soldering iron
                    <[log in to unmask]
                    ORG>


                    08/22/01
                    12:50 PM
                    Please
                    respond to
                    "TechNet
                    E-Mail
                    Forum."






Our design department is switching to pin type LCD from elastomer based
LCDs to
get rid of mis-alignment faults due to tolerances of bezzle & LCD fitment.

This pin type LCD has 36 pins in dual rows (18 in each row) with a pitch of
~2
mm. The assembly is such that we can not solder it through wave soldering (
type AB assembly)  and we do not want to incur heavy cost in selective
soldering machines. We would like to go for hand soldering option but in a
faster way.

Can someone advise which type of tip and which product is best suitable for
this application? Will this method work reliably & successfully in long
run?

Awaiting a solution for the-net team.

Thanks in anticipation,
Ajit Jain

Secure Meters Limited,
Pratap Nagar Indl Area,
Udaipur, India

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