paste fill layer (GTP and GLP)

Archive BatchPCB
1

Hi

this is a beginner question

what do I get from sending the GTP/GLP layr to batchPCB (with the rest of the layers)

  1. do I get stencil sheet and need to use squeegee with paste?

  2. do I get PCB with paste on it, so I can place the component without the need of any extra paste?

if not

for what does the batchPCB use this layers?

does it change anything on the PCB board?

thanks

2

Hi natanel,

From what I understand, BatchPCB only provides circuit boards, not solder paste stencils. See here: http://batchpcb.com/index.php/Faq#what_do_i_get

Since solder paste typically is only usable for 4-10 hours after stenciling onto the board (due to the liquid flux drying out, etc.), you wouldn’t really want to get a PCB pre-stenciled. It would also be pretty messy.

There are some handy services for getting cheap (less than $100, I think?) foil stencils, but then you have to purchase no-clean solder paste, carefully build a fixture to hold your board in place, and squeegee it by hand. Then you have to figure out how to reflow it. I’m sure you could use a oven if you had to. It’s not very fun, and without all the high-dollar machinery of a professional SMT shop, it can take way more time and money than just hand-soldering. Of course, if you’re trying to use components like BGAs or ICs with ground pads, hand soldering won’t cut it.

Hope this helps!

Tim

3

If you’re not doing more than a few dozen pads, and you have moderately steady hands, a syringe of solder paste works just fine. Note that you’ll need some method of reflowing, such as a skillet or hotplate.