Historically, the plastic IC packages shipped in this manner would
evaporate all their inner pressure out during shipment and upon arrival in
Los Angeles "suck" in the smoggy air to equalize the pressure after
landing. This caused a very early failure mode that took a really bright
engineer to find.
It is my understanding that the plastic packages don't have that problem
now (but I do not know) It is also my understanding that the ceramic
packages don't exhibit this failure mode.
The aerospace engineers should be able to answer your question
definitively.
- Robert -
On Wed, 3 Jun 1998 [email protected] wrote:
> This is not a safety or EMI question, but because this group has such
> broad backgrounds and diversity I am hoping that someone can comment.
>
> I have been asked by one of our customers to ensure that our equipment
> is capable of being shipped in an un-pressurized aircraft for altitudes
> of 30K to 40 K feet. This is a non operational requirement, but are
> there other concerns I should be aware of? I recall hearing that some
> commercial grade electrolytic could explode at high altitudes.
>
> Any comments or suggestions greatly appreciated.
>
> Rick Busche
> Evans & Sutherland
> Salt Lake City, Utah
> [email protected]
>
>
