Re: IC aging

From	john larkin <jl@glen--canyon.com>
Newsgroups	sci.electronics.design, sci.electronics.components
Subject	Re: IC aging
Date	2025-12-01 10:26 -0800
Organization	Highland Technology
Message-ID	<esmrikhm3g188f3oc49tscokf8hhhhh9dq@4ax.com> (permalink)
References	<10gis48$328$1@reader2.panix.com>

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On Mon, 1 Dec 2025 01:47:52 -0000 (UTC), David Lesher
<wb8foz@panix.com> wrote:

>I'm curious about lifetime of IC's from the 1980's.
>
>Has there been any published work on degradation 
>of stored IC's of that era?

There are some issues, like oxidation, corrosion and tin whisker
growth. Best to keep them cool and dry.

Powered up, some older parts had electromigration problems, from
excess current density in metalization.

And the dreaded Purple Plague.

Really early plastic ICs had creepy-crawley  epoxy that broke things.

Some parts had slow ion migration in oxide layers too.

There's a lot of stuff online:

https://www.ti.com/lit/pdf/slva304/

John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics

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IC aging David Lesher <wb8foz@panix.com> - 2025-12-01 01:47 +0000
  Re: IC aging Bill Sloman <bill.sloman@ieee.org> - 2025-12-01 14:33 +1100
  Re: IC aging john larkin <jl@glen--canyon.com> - 2025-12-01 10:26 -0800
  Re: IC aging Joerg <news@analogconsultants.com> - 2025-12-01 10:38 -0800

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