Electronic – Fiducial design


I'm a bit confused about the correct fiducial design. I've been reading about pick and place machines, and some suggest that fiducials should be round while others say they should be a cross. Also, sometimes I read that it should have paste on top and sometimes not.

So what is a standard design for such a fiducial? This was my approach until I read about it:

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Best Answer

Check this link for guidelines: http://www.accutroninc.com/pdf/download/fiducial.pdf

1mm diameter, round, with 2mm diameter of solder mask removed is the IPC guideline.