I'm an old guy with bad eyesight so... how hard would it be to build an o=
ven
to cook your SMD PCB's in?

/Ake

-----Ursprungligt meddelande-----
Fr=E5n: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]F=F6r Jake Anderson
Skickat: den 5 mars 2004 17:38
Till: PICLIST@MITVMA.MIT.EDU
=C4mne: Re: [EE]: Hand soldering SSOP


a friend of mine uses the same technique
(he used to do an 80 pin part in an hour now he does 8 an hour, well
actually now he works somwehere different but hey)

the only difference he said was he then went along after solder and desol=
der
with a pin and pushed each pin on the chip, if it wiggled then it wasnt
soldered ;->
-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Paul James E.
Sent: Friday, March 05, 2004 3:05 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: Hand soldering SSOP


 All,

 The way I hand solder any fine pitch SM device is to put a small amount
 of solder on a corner pin, line the part up and solder the tinned pad to
 it's corresponding pin.   Then I go to the diagonally opposed corner and
 do the same.   At this point I have two diagonally opposed corners that
 are soldered to the corresponding pads.   I then solder the remaining pa=
ds
 and pins no paying particular attention to keeping them from shorting to
 adjacent pins.  I am more concerned with good wetting of the pin/pad
 junction.  Once all the pads are soldered, I then go back with solder wi=
ck
 and wick away all the excess solder.  Once I get this done, and then cle=
an
 up the remaining flux with flux remover, you can't tell my job from a
 machine soldered job.  Actually you can, but just barely.  This method h=
as
 worked well for me for >10 years now on all pitch parts.  It has just be=
en
 more necessary with the finer pitch parts.   Hope you have as much luck =
as
 I have.


                                                   Regards,

                                                     Jim



>> I have to solder quite a few 28pin SSOPs. I am used to doing
>> SOIC with the naked
>> eye, but with the tighter spacing, will I cope using a 5x
>> magnifier lamp, or is
>> a binocular microscope vital? Views from SSOP handsolderers
>> very welcome!
>
> My tips: iron and solder are not that important, a good magnifying
> glass and de-soldering braid are essential.
>
> Wouter van Ooijen
>
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
>
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