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        Fri, 11 Sep 2015 04:29:11 -0700 (PDT)
Date: Fri, 11 Sep 2015 13:29:06 +0200
From: "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] zero soldermask clearance not caught by DRC
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On Fri, 11 Sep 2015 06:40:53 -0400 (EDT)
GENE GLICK <geneglick AT optonline DOT net> wrote:

> I don't think you are going to have any problems. I've worked with 
> layout guys who routinely have 0 clearance on the soldermask. The board 
> fab houses will adjust their process, sometimes without telling you. At 
> work, we use a pretty good place, and they will adjust the clearance up 
> or down as needed. I think the fab houses have to make adjustments to 
> your design in order to work with the tolerances of their own processes.
> 
> Anyway, you can ask the fab house if they fix that sort of stuff up or 
> not.

Usually solder mask is a little bit larger to not cover any of the pad. I guess you will be able to solder the part even if "visible" pad is a little bit smaller because of tolerance problem with solder mask.