Note the precise solder paste
patterns on the board. There’s
an art to laying just the right
amount of paste—too much, too
little or even paste in the wrong
place, can make the difference
between a reliable controller
and a headache for you as a
Yep, it’s just what it looks like. A very expensive squeegee presses a sticky solder paste
through a precision screen onto the circuit panels. Another machine then presses the
electronic parts into the sticky stuff, where they stay put until the entire panel is heated in
an oven to melt the paste. When it cools, the parts are permanently soldered in place.
Some things can’t be done by machine. Here a worker places barrel connectors on a panel by hand.