General > General Technical Chat
IC shelf Life, how long is to long
gogoman:
Hello, If the IC is new and stored properly (ESD bag 25-40C & 30-40RH), In general what is the shelf life, how old is to old, 5, 10, 20 years?
Will a new 20year old device last as long as a recent version?
Does the shelf life depend on the IC Type (logic gate, Transistor, cmos/nor flash, programmable logic)?
Does the silicon structure deteriorate while on the shelf?
thanks
retiredfeline:
Most ICs die of technical obsolescence rather than aging processes like corrosion. :-DD I have ICs from 50-60 years ago that still run.
gogoman:
If the old never used device were to fail, I suspect the materials are decomposing. It's not clear to me which parameters (timing, threshold etc. ) are effected and in what order. :-//
What type of devices are you using?
Halcyon:
The only issues I've have storing IC's (mostly DIP packages) is that some of the tubes use rubber (or rubber-like) stoppers. After many years, the stopper material can go hard and leach some oily liquid all over everything. I found this with a bunch of old 3COM boot ROMs.
I use IC tubes with holes and those hard plastic pins instead.
retiredfeline:
--- Quote from: gogoman on May 03, 2023, 04:15:11 am ---What type of devices are you using?
--- End quote ---
I made a binary clock with DTL chips. https://hackaday.io/project/168075-dtl-binary-clock
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