Hi Ron,

Best thing to do is to print your board then place the components on the
first layer, then before reflow dispense a dot of solder paste on each
termination where you'll be doing your stacks, then hand place the stacked
component then reflow everything. We did that all the time at a past
employer. Takes a steady hand, but it's easier than hand soldering it and
it's much better for the caps that way...they don't like 800-degree
soldering irons that much.

Some people are better at this technique than others, I could do 0603's
pretty easily, but we had some ladies that could do quadruple stacks with
0402's! No sh*t! Check it out:

http://stevezeva.homestead.com/files/Quad_Stack.JPG

Steve


On Wed, Jul 23, 2014 at 1:20 PM, Ron Feyereisen <
[log in to unmask]> wrote:

> Hi Technetters,
>
> I'm looking for some sort of documented technique (if one exists) and
> advice on hand soldering stacked SMT components.
> We're currently working on a production job that requires hand soldering a
> 0603 resistor on top of an already reflowed capacitor of the same size and
> we're experiencing some fallout with one side not being completely
> connected at the top of the stack with a full fillet. Inspection is having
> to inspect at 10x mag and it's slowing down throughput.
>
> Any advice on improving our soldering techniques would be much appreciated!
>
> Thanks,
>
> Ron
>
> Ron Feyereisen
> Continuous Improvement Mgr., CIT
>
>
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