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below: 20 circle flash 0 false false 27 true So when our CAM inputing data this Dcode will be treated as shape Round and size 76 mil without showing any alarm. product engineers have to check and pare the difference between customer39。s original aperture list and ours. For this case our engineer did find the remark on the bottom of aperture list Thermal aperture 20 padstack is TH078057204 .33. Our Produc engineer mistook aperture 20 as DCode 20. And so check all the layers using D20. But find D20 is not used for power and Ground, so this remark we neglected.3. Root Cause Product Eng. Networking SystemPC CAM W/S CAM W/S Star 1000Disk RaidFoxconn Net WorkingW/SNC RouteNC DrillPlottorFlying Probe TesterW/S AOI (outer layer) AOI (Film)Vendor Qualification Flow (1) Start1. New PCB,2. New Supplier ChangeNew PCBAccepted Technology New Facility,New Supplier orNew TechnologyRevision ChangeAc