O'Dean,
Of course I would appreciate any standard numbers you can present. I have also seen this kind of documents, but can't recall where to find them.
Thanks,
Ioan
-----Message d'origine-----
De : TechNet <[log in to unmask]> De la part de [log in to unmask]
Envoyé : février 09, 2022 15:02
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Objet : Re: [TN] Anti Counterfeit
Yes, there are some good standards out there regarding counterfeit parts and detection methods. In those standards they note situations exactly as you described. Along with the first bunch of parts on the reel being good parts and the rest fakes, they showed how to use X-ray (as well as several other methods using a systemic, step-by-step checklist which included de-capping) to identify the fakes.
I do not recall the Standards offhand, but I have them in the SOPs for receiving and receiving inspection departments in the client companies that I work for and can add them here tomorrow if anyone wants to know the standard numbers. None were IPC standards, they were what I call "other" standards, but they were sure helpful in putting together a Counterfeit Parts procedure that has eliminated all instances of fake parts getting built up into product.
I am sure others on this forum can probably chime in with the numbers of the Standards for counterfeit detection and prevention.
Odin
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From: TechNet <[log in to unmask]> On Behalf Of Jerry Dengler
Sent: Wednesday, February 9, 2022 1:29 PM
To: [log in to unmask]
Subject: Re: [TN] Anti Counterfeit
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Another cautionary tale. Some years ago we resurrected an old assembly for a customer which had a few obsolete components. These were sourced through brokers. These components were inspected, solder ability verified and the first 2 components on each reel were decaped and inspected. Along the way we one of the components had many lots that were counterfeit, some very convincing until they were decaped. On one of the last builds we did this component passed all incoming checks but when we started testing units they were all failing.
It turned out that the first 10 components in the reel were genuine components but the rest were counterfeit! So then we would take 2 from the middle of a reel to decap.
This is now part of our strategy.
Regards,
Jerry Dengler
Production Manager
Pergamon Corporation
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Rivera, Raye
Sent: Wednesday, February 09, 2022 2:11 PM
To: [log in to unmask]
Subject: Re: [TN] Anti Counterfeit
It is a constant headache. I agree that visual and the steps you mention are good measures. I like x-ray too, because you can also often see the manufacturers internal markings which helps a lot. Ask your broker for their inspection report. Some of them have really good reports. Others, not so much.
The other thing we are doing is control runs, where we build just two or three boards with components from a batch that might be suspect due to a new broker, age, or whatever. That way if there is a functional failure you at least avoid placing a few thousand bad parts. It is a nuisance, and you can't do it for every single part, but it can greatly reduce your risk.
Best regards,
RAYE RIVERA
Quality Manager
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From: TechNet <[log in to unmask]> On Behalf Of Wayne Thayer
Sent: Wednesday, February 9, 2022 10:45 AM
To: [log in to unmask]
Subject: [TN] Anti Counterfeit
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Greetings-
The only way I've been able to keep parts moving in this environment of part shortages and 72 week lead times is by constantly finding substitutes.
The least appetizing substitute option is offshore brokers. We are revising our counterfeit detection strategy for minimizing cost/benefit (and time).
My inclination is to do careful visual inspections, especially labels and lead finish, followed by solvent testing and a simulated Pb-free soldering profile on samples of the lot. I also compare the decapsulated die faces with known genuine parts.
Is anybody else working this issue? Our old corporate document suggests XRF and x-ray inspection, but I'm not seeing the value in those. XRF is a great way to see if your system is Pb-free, but I'm more interested in whether the leads were soldered to previously which a thorough visual inspection should find.
Thanks,
Wayne Thayer
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