Adafruit Eagle Part Generating Errors (CR2032-THRU)

[sciguy77]

Hi guys,

So I'm mounting a coin cell on the back of my pcb using the CR2032 through hole part from the Adafruit Eagle library. When I send it off to my fab they email me, "Soldermask relief is exposing trace on bottom layer." I had one made anyway, see the attached image of the part. Is the exposure of traces intentional? Does this mean I'm not supposed to have any traces routed around that area? My pcb board is just barely bigger than the battery holder so this would not be possible. Is the solder relief necessary? If not, how do I get rid of it?
I'd love to hear you guys' thoughts.

Thanks!

[thefatmoop]

Can you believe it's 2013 and we still can't make a phone camera that can focus? You don't want any solder mask on that square, but you do on the traces around it.

if I understand correctly

[sciguy77]

Sorry about that, used my iPhone camera and that was the best of ~10 shots. It doesn't like to take photos of tiny things.

Should I draw solder mask over the traces by hand in the .brd file?

[Zener]

It depends what you are putting there. Are you putting a battery holder? If so it is probably OK as is. You just don't want anything shorting to those traces.

[Zener]

As far as picture quality, nothing approaches my old Blackberry! I hated the web (un)usability but the camera was superior. I have an iPhone now and it never ceases to provide dull blurry photos. I keep the Blackberry around in case I need to shoot any close ups like that, or any photos that need to look good.

[sciguy77]

I'm using one of these guys: http://www.digikey.com/product-detail/e ... ND/2194764

As you can see, the battery will likely be touching the entire diameter of the relief circle, so shorting seems like a definite risk...

[Zener]

That is an interesting holder. So it appears one side of the battery is supposed to directly touch the board. The bigger problem I see is the 6 pads in there which I assume are for components. There are different ways to fix the problem. I am not sure what I would do.

[sciguy77]

I've made some changes to the board, and I'm now using surface mount components on the top layer. Looks like I can just draw some solder mask on top of the traces and that should solve everything...

[Zener]

My concern is the mask will lift the battery just enough to keep it from touching the square pad. You might want to build up the height of the square pad by adding a little solder to it