This is useful tip for anyone making or using surface mount components on PCBs.
It relies on access to a laser cutter, so if you don't have one, look away now.....
I cut a plastic stencil on the laser, align it with the PCB pads and then squeegee a thin layer of solder paste through the holes.
Peeling away the stencil will leave a perfect pattern of pads with the correct amount of solder on each one.
I have just successfully used this process on components with a 0.025" pitch (0.65mm) - that's VERY small,
The prototype in the pictures has been made by my good friends at Spirit Circuits in the UK
, and is a full plated through, double sided board. with immersion silver coating.