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Subject: Re: [geda-user] pcb: solder mask clearance in DRC?
From: Stefan Salewski <mail AT ssalewski DOT de>
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Date: Tue, 17 Dec 2013 16:41:55 +0100
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On Tue, 2013-12-17 at 14:56 +0100, Gabriel Paubert wrote:
> I have to disagree, for the finest pitch BGA, the solder mask aperture
> is actually smaller than the pad. The pads are said to be SMD 
> (solder mask defined), while traditional pads (defined by the copper
> area) are said to be NSMD (non solder mask defined).

That is interesting -- I have never used BGA parts.