Outel has two lots of boards, one by
Fabricator X and the other by Fabricator Y. After QA examines the boards, they find inconsistent signal
performance between the two lots of boards.
Outel requests tooled data from both fabricators to compare artwork...
- Plane clearances on PCBs from Fab X are increased by .006
- Trace impedance are no longer within spec due to increased ground clearances
Outel REFUSES to pay Fabricator X.
Identifying Differences Ensures Accuracy
Graphically comparing artwork layers will ensure PCB performance. Layer Compare
is necessary to accurately identify differences. It compares layers intelligently with
automatic "go-to" delta enabling:
- Fast detection of ECO revisions between artworks
- Detection of artwork modification by fabricators
Layer Compare supports filters to find differences based on size.
The Result
Outel lost a lot of time and money due to this oversight. Fab Y receives an order to produce more
boards for Outel. 50% of Outel's shipping capacity is delayed while waiting for
additional PCBs.
Outel has yet to place another PCB order with Fab X.
In Conclusion
Outel has revised their process to delay approval of all PCBs until a full CAM350
Layer Compare analysis is performed against tooled artwork.
