I would like to create a device with the pinout design similar to the Atmel’s module ATZB-900 (look at figure 3-1 and 3-2 of the [datasheet to see what I mean). The shape of pins look to me like a half square via.
But the question is the opposite, right? Not what footprint fits the Atmel module, but how to make your own module that fits the same kind of footprint as the Atmel thing? I haven’t used Eagle but if I’m picturing the module correctly I would think you’d just make a series of pads down the edges (like short edge fingers) and then draw the castellations into the PCB outline. Definitely tent the bottom sides of all your vias since that surface will be touching the board it mounts on.
I’m not sure the PCB house will be thrilled about the fancy shape though – a lot of them charge extra if the outline has more than a few straight cuts in it. BatchPCB doesn’t include that in their pricing but it’s possible this order would get them scolded by Gold Phoenix. Just a guess – how would I know.
jmbw:
But the question is the opposite, right? Not what footprint fits the Atmel module, but how to make your own module that fits the same kind of footprint as the Atmel thing? I haven’t used Eagle but if I’m picturing the module correctly I would think you’d just make a series of pads down the edges (like short edge fingers) and then draw the castellations into the PCB outline. Definitely tent the bottom sides of all your vias since that surface will be touching the board it mounts on.
I’m not sure the PCB house will be thrilled about the fancy shape though – a lot of them charge extra if the outline has more than a few straight cuts in it. BatchPCB doesn’t include that in their pricing but it’s possible this order would get them scolded by Gold Phoenix. Just a guess – how would I know.
I see now. Maybe instead of drawing the castellations, you could just put PTH drill hits on the edge. It may make the PCB mfg. happy.