Did I mention that blue + gold is the new chique around here?
All JeeLabs boards will use a blue solder mask and gold plating from now on, which is very nice for soldering. And because I think it looks nice :)
You may have seen this already, because all recent JeePlug proto boards use that design.
To make sure that solder paste would work properly, I did a little reflow test. First a hefty dab of solder paste of varying thickness, and three 0603 resistors:
Can you spot that third resistor? Hint: it’s parallel to the lettering.
Then into the reflow grill, taken up to 250°C as required for lead-free solder:
Notice how each of the resistors aligned itself nicely, due to the capillary pull of liquid solder. And how all the solder paste ended up on the gold contacts – that’s what solder masks do: repel solder!
Here’s the other side after reflow:
Not that this matters much, since solder paste is normally only applied to pads on the top side…