X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <1387284113.2039.9.camel@AMD64X2.fritz.box> Subject: Re: [geda-user] pcb: solder mask clearance in DRC? From: Stefan Salewski To: geda-user AT delorie DOT com Date: Tue, 17 Dec 2013 13:41:53 +0100 In-Reply-To: <52B0214C.8030700@envinsci.co.uk> References: <52B0214C DOT 8030700 AT envinsci DOT co DOT uk> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.8.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On Tue, 2013-12-17 at 10:02 +0000, Matt Rhys-Roberts wrote: > Hi all, > > Is it possible to somehow cause the DRC to flag up when solder mask > clearance is too small for manufacture? > > I have inherited several SO8 footprints to choose from, and I didn't > notice that the one I picked had barely any SM clearance around the > pads. This cost us an extra 5% when the board makers detected it was > outside the standard specs for their process. > > No blame, just nice to see this added to the next generation DRC. > > Any comments please? Indeed in my opinion solder mask clearance is more a board property than a property of individual components on that board. So I asked about 4 years ago a similar question -- as I remember it is possible to set solder mask clearance to the same value for all pieces by a trick: select all, shrink solder mask to zero, and then increase it. Sorry, I can not remember details. Of course it would be fine to have a way to ask minimal solder mask of all parts on the board -- if it is not already available it should be a nice task for you during christmas holiday. Of course, checking with gerbv is still a good idea.