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[SOLVED] Plastic or Ceramic package for integrated circuits working in temperature ranges...

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palmeiras

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Hello!
What is the typical temperature range for packages made of plastic?
Am I obligated to use Ceramic packages for the temperature range of -40 to 120 C?
and for ceramic packages? what is the typical temp. range?
We are designing a prototype and we wish to characterize it for that temperature range.

Thank you,

Regards.
 

TI is putting out "enhanced plastic" parts for MIL temp range.
There has been a lot of investigation on "PEM" reliability at
temperature & across cycling in the space & military markets.

Just remember "can be" and "will be" reliabile, are different
than "is". It comes down to the assembly flow and inspections.

If you only need a few hours out of it and aren't going to
moisture-soak it, then just go ahead and test it. But there
is a school of thought that asys you ought to characterize
what you intend to ship. And plastic can impose some
effects like piezoresistive strain effects that hermetic
does not.

If you want a small quantity of samples built, the hermetic
may be cheaper (open-tooled package and a lab bonder)
than plastic.
 
Thank very much for your reply, Dick_freebird.

But for me it is not clear yet which material package I should use for this temperature range.
What is the traditional temperature ranges?

Or you are saying that the temperature range is not the concern, and both materials can be used?
 

Plastic used to be considered 0-70C but people have pushed
that out to 125C (given enough testing / qualification, good
mold compound, etc.). But in the case of a particular part,
you'd have to go to the mfr, see if they offer wider temp
range in the plastic or not. It's a mixed bag.
 
Thanks! I got it.
Is there any disadvantage of ceramic package over the plastic?
It seems that ceramic offers large temp. range and (as you´ve written) less piezoresistive effect.
Is there any advantage of using plastic?
 

with power dissipation more than ~2W i think would be better to use ceramic package.
also as mentioned the main advantage of plastic - price.
 

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