James,

I find it works best to put a (very) small blob on just one pad.
Solder the part to this using tweezers & an iron, and then solder the
other pad(s) normally. Go back and touch up the first pad afterwards,
if required. This way you have a flat pad surface to work with & only
have to worry about one pad at a time.

Watch out for lead poisoning unless you're using lead-free solder!

RP

2008/6/10 James Newton <jamesnewton@massmind.org>:
> Were does one get good solder paste in a syringe these days?
>
> I found this:
> http://www.mouser.com/Search/ProductDetail.aspx?qs=wT7LY0lnAe2r5UPJoeJJnQ%3d
> %3d has anyone used this stuff?
>
> I'm just doing some SMT re-work (without real SMT tools or experience, of
> course ;) ) and I'm hoping this will help simplify the process, especially
> the part where I'm holding the iron in one hand, the part down with a pair
> of tweezers in the other, and holding the solder to it with my third hand
> (mouth).
>
> I know I could make a two legged, plus a pick, weighted thingy to hold the
> part down, but I'd rather have the control.
>
> And I could solder blob the pads, then flux, place the part and solder
> down... but these boards are really weak and I've already killed a couple
> heating the pads twice. I'm thinking a bit of solder paste, hold the part
> on, touch it quickly with the iron on each pad and done.
>
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