If I am building final assemblies in house I would prefer to use barcodes and RFID tags.
If the sub-assemblies (PCBAs) are being shipped to a customer for final assembly I would prefer using an automated scriber. This provides the end user the ability to confidently determine the assembly passed test and, makes it easy to sort through multiple assemblies at the customer site, that would otherwise need someone with a computer, barcode reader and access to the manufacturing database to confirm it passed test. This requires that a specific location be identified where a scribe mark can be applied without impacting the functionality of the assembly or damage any components. If a scribe cannot be applied, a corner of the board would be lightly ground down indicating the bard passed test. Note, they are all automated and can only mark the assembly after passing. I will say that it can be difficult to see the scribe mark after the application of conformal coating however, it can still be seen. This can be remedied by applying adding a small box to the silkscreen layer where the scribe would be applied. All that said, I would still have a method to tack my metrics on the shop floor.
I do not like manual ink systems/marking systems because manual process fail all too often. I push for as much automation as possible when developing process or evaluating new PCBA designs for DFX.
Ted T.
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Brooks, William
Sent: Tuesday, April 19, 2016 3:28 PM
To: [log in to unmask]
Subject: marking of tested board assemblies?
How does your organization mark or identify tested and approved printed circuit assemblies to differentiate them from un-tested pcb assemblies?
William Brooks, CID+
Printed Circuit Designer
2747 Loker Ave West
Carlsbad, CA 92010-6603
760-930-7212
Fax: 760.918.8332
Mobile: 760.216.0170
E-mail: [log in to unmask]
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