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From: | "McKay, Roy L [PHYSA]" <mckay AT iastate DOT edu> |
To: | "geda-help AT delorie DOT com" <geda-help AT delorie DOT com> |
Subject: | [geda-help] Split negative & positive solder mask |
Thread-Topic: | Split negative & positive solder mask |
Thread-Index: | Ac53LIj6IvnhDgsNTc6SN33GM4mIug== |
Date: | Tue, 2 Jul 2013 14:00:47 +0000 |
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--_000_D2FF84E1E2337A488420C56B924CA62C3A73E252ITSDAG2Ditsiast_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All, I have a requirement with splitting the bottom soldermask into two secti= ons. The bottom layer is a split ground plane with an area seeded with digi= tal components and the remainder seeded with a number of signal related via= s that are not grounded. The section containing digital components is to c= overed with the usual mask covering everywhere except the pads. The second= section is opposite, cover the via holes and expose all the copper plane. = Hence a negative of the usual soldermask. Does anyone know how to pull this off? I'm using PCB 20110918 on Fedora= 16. Thanks in advanced, RM --_000_D2FF84E1E2337A488420C56B924CA62C3A73E252ITSDAG2Ditsiast_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)"> <style><!-- /* Font Definitions */ @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri","sans-serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:"Calibri","sans-serif"; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--> </head> <body lang=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> <p class=3D"MsoNormal">Hi All,<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal"> I have a requirement with splitting the= bottom soldermask into two sections. The bottom layer is a split ground pl= ane with an area seeded with digital components and the remainder seeded wi= th a number of signal related vias that are not grounded. The section containing digital components is to covere= d with the usual mask covering everywhere except the pads. The second= section is opposite, cover the via holes and expose all the copper plane.&= nbsp; Hence a negative of the usual soldermask.<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal"> Does anyone know how to pull this off?&= nbsp; I’m using PCB 20110918 on Fedora 16.<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal"> Thanks in advanced, RM<o:p></o:p>= </p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> </body> </html> --_000_D2FF84E1E2337A488420C56B924CA62C3A73E252ITSDAG2Ditsiast_--
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