Fiducials and Keepouts -- The last mfg I dealt with recommended that the fiducial be a copper circle with a diameter between 0.5mm and 3.5mm and that the solder mask diameter be three times larger than the copper. I made a single 1mm pad footprint with the 3mm clearance. IIRC the requested placement was three corners and 3mm from the edge. There were also component fiducials required for fine pitch devices. I do not recall the specifications since they didn't apply to the boards I was doing. They also specified a minimum keepout of 118mils for their Fuji machine and 125mils for their ATE. I made the keepout 125mils on all sides. (* jcl *) -- You can't create open hardware with closed EDA tools. twitter: [1]http://twitter.com/jluciani blog: [2]http://www.luciani.org
References 1. http://twitter.com/jluciani 2. http://www.luciani.org/
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