Electronics > Manufacturing & Assembly

Component distributors taking ESD precautions?

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Faringdon:
Hi,
How can it be assured that  component vendors are using ESD precautions when they pick eg FETS?

Please imagine,  a staff member   has coffee break in a few minutes, and they have to pick 2 FETs out of a tube and package them up for a customer……is that picker going to get the ESD wrist strap (properly) on and be sure the ESD heel strap is (properly) on? Why bother, who’s going to find out it was them that ESD damaged the FET?......they can just say the circuit was faulty.
I mean, most companys you go to don’t bother with ESD.
Ive just had a UCC28070A TSSOP20 dead out of the box…..replaced it and circuit was fine….now ive had a FET blow up.
How many companys do you go to where benchs have rubbish piles under them where people have just swept trash under it? (rather than shovel it , and take it to the skip)....and we think this sort of thing doesn’t go on with ESD precautions too?
……And does it even matter in the West?....Doesnt the West get most of its electronics done in the Far East…even more reason why this ESD_bad activity could  be going on unabated/un-noticed.

jpanhalt:
Is that the same TSSOP20 device for which you developed a new method of soldering?   One solution to put your mind at rest would be to get "burn-in sockets" and test your device before installing them. E.g., https://www.3m.com/3M/en_US/p/c/electronics-components/interconnect-products/breadboards-test-clips/test-burn-in-sockets/

Cheaper ones and copies are available.

SMTech:
It's not uncommon to see ESD areas equipped with a turnstile linked to an ESD test station, no footstrap that functions, no entry. I would suspect Farnell etc operate at this level, in addition to having all other sensible precautions and treatments. The number of faulty semiconductors we see is really really tiny, almost every fault we encounter is a manufacturing defect or ham fisted use of a test probe etc. In fact the only notable instances of dodgy semi's we've ever seen have come during periods of shortage like this from parts sourced outside of distribution. In those cases we've  had regulators that don't all function (looked like they had been very well "reconditioned"), MCU's that are missing their ICP bootloader and really really old stock that needed a serious baking to avoid popcorning. I don't think we've seen any indication of poor ESD handling practices, however RS and Farnell are both terrible for grabbing QFPs with tweezers despite then packing them with labels telling you to only handle with a pickup tool, this has resulted in £60 FPGAs that are unusable, a different failing but one you can at least see before soldering.

Never seen a factory quite so scruffy as to have actual rubbish shoved under benches

Faringdon:

--- Quote ---The number of faulty semiconductors we see is really really tiny
--- End quote ---
Thanks, do you do a lot pf  single PCB prototyping though, where you are ordering say FETs in qtys of just 1 or 2?


--- Quote ---Never seen a factory quite so scruffy as to have actual rubbish shoved under benches
--- End quote ---
I must confess to seeing loads...(mostly outside of electronics)..the worst was a big supermarket, where people had dropped rubbish including food rubbish down  the sides of an enormous skip.....people sent to clean it up just pushed it under the skip........i was then  sent to clear it after several months and it was fowl stinking and full of dead rats who had died after scoffing rat bait. Took an entire day.

SMTech:

--- Quote from: Faringdon on August 08, 2022, 01:00:07 pm ---
--- Quote ---The number of faulty semiconductors we see is really really tiny
--- End quote ---
Thanks, do you do a lot pf  single PCB prototyping though, where you are ordering say FETs in qtys of just 1 or 2?

--- End quote ---

yup, 1,2,5, 150 or indeed because RS are RS; 100 bags of 1,2or5 because that's all they have

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