I have made various solder shunt jumpers used to select resistors, capacitors, or to be shorted after tuning. The first versions I made used Cu arcs and traces to form 2 half moons with a 6 mil gap. These worked ok until a version change in protel and then editing the footprint primitives to the correct net became easier if the shape is all traces. I now use small triangles with a 6 mil gap. My intention with the semicircle and triangle structures is to have the solder surface tension tend to bridge the gap. I place a small top layer pads within the triangles for the netlist to attach to. When using a three position structure I have made the center contact rectangular. I made these jumpers for solder stencil controlled positioning. As far as I am aware all are applied manually at this time. I think there would be no problem finding an amount of over stenciling of paste so that these jumpers form during reflow. Dave Eloranta Locus Inc. Madison, WI
-----Original Message----- From: Emanuel Zimmermann [mailto:[EMAIL PROTECTED]] Sent: Thursday, September 05, 2002 8:54 AM To: Protel EDA Forum Subject: Re: [PEDA] Solder jumper Michael I'm wondering if you ever tried adding solder paste over the two pads to be shorted by default. I didn't do it either, but would be interested in any experience with such a technique. Emanuel Watnoski, Michael wrote: > adding wires. If you need the pads normally shorted, add a thin track on a > different layer and combine the layers in a Gerber editor. These can be cut > as necessary in production. ************************************************************************ * Tracking #: B9FA089DA995F84EA867516FE0C5B93358FAF1A0 * ************************************************************************ -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% MPL AG www.mpl.ch Emanuel Zimmermann [EMAIL PROTECTED] Manager R&D Phone: +41 (0)56 483 34 34 Taefernstrasse 20 Fax: +41 (0)56 493 30 20 CH-5405 Daettwil %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
