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'[EE]: SMT soldering -- which solder / paste / etc'
2003\01\30@193130 by PicDude

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Since I'm also looking into experimenting w/SMT's soon, I'm
wondering what good solder/flux/etc I should add to my next
Digikey order.  (Or non-Digikey if better supplies available
elsewhere).  I'm looking at the bottom right of this page...
   http://dkc3.digikey.com/PDF/T031/0931.pdf

Any thoughts on what I should pick up?

Thanks,
-Neil.

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2003\01\31@113201 by llile

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Neil,

I'd get a syringe of water soluble paste solder and a syringe of RMA flux.
THe pair will set you back almost $75 at digikey.   I still clean my
boards with a can of  flux cleaner solvent and a toothbrush.    Wire
solder is just too thick, and I find that plenty of flux seems to make it
easier to avoid solder bridges in tiny surface mount stuff.  The flux can
also stick tiny parts to the board so they don't slide off when you
sneeze.

Also get some needle sharp tweezers, don't use dimestore eyebrow tweezers
get a pair that costs $30.  And you'll need a big magnifier lamp, and
perhaps a 10X eye loupe. SMT is not cheap!

I have a kit I bought from mouser.  They no longer carry it, but you can
order it direct from the manufacturer.  The company is ESP,
1-800-338-4353, http://www.efdsolder.com   They sell a kit with 5 syringes of
solder and flux, plungers, several tips, and vacuum tweezers for $89. That
is about what you'll pay for two syringes from Digikey and you get a bunch
of accessories.   You can only order the kits over the phone not on the
website.  I really recommend the kits, they have worked well for me.

I would use SN63PB37 or SN62PB36AG2 alloys.  I would not mess with
lead-free alloys as they make an already difficult task harder. I would
use RMA flux, and clean it with solvent.  I would not mess with "no-clean"
flux for prototyping. This is about what you would find inside wire
solder.

http://www.efdsolder.com/prod_alloys.htm

--Lawrence Lile






















-- Lawrence Lile
Senior Project Engineer
Toastmaster, Inc.
Division of Salton, Inc.
573-446-5661 voice
573-446-5676 fax




PicDude <.....picdudeKILLspamspam@spam@NARWANI.ORG>
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01/30/2003 06:27 PM
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Since I'm also looking into experimenting w/SMT's soon, I'm
wondering what good solder/flux/etc I should add to my next
Digikey order.  (Or non-Digikey if better supplies available
elsewhere).  I'm looking at the bottom right of this page...
   http://dkc3.digikey.com/PDF/T031/0931.pdf

Any thoughts on what I should pick up?

Thanks,
-Neil.

--
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email EraseMElistservspam_OUTspamTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body



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