[sdiy] What the heck is this for?

[Neil Johnson]

Hi,

Joe Grisso wrote:
> Those look like solder paste masks for SMT devices. You can use
> those for single chip placement for doing SMT parts. You apply solder
> paste to a small squeegee, place the mask over the pads on your PCB,
> then squeegee the paste down. Once the paste is down, you place the
> part on top of it and then heat up the solder with a hot air pencil.

Most of those masks are for BGA parts - good luck soldering those  
with a hot air pencil!

Neil
--
http://www.njohnson.co.uk