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Avionic & military applications need -55C operation

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DoctorZ
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re: Avionic & military applications need -55C operation
DoctorZ   5/14/2012 6:25:22 PM
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Advanced thermal management materials, which have low coefficients of thermal expansion, can minimize thermal stresses and warping at low temperatures. In addition, they have low densities and thermal conductivities up to 1700 W/m-K. They are well established in aerospace/defense and commercial applications. If anyone wants papers on the subject, send me an email at c.h.zweben@usa.net

Bhola_#1
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re: Avionic & military applications need -55C operation
Bhola_#1   10/30/2010 5:12:33 AM
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Interesting but there are others that run below -55 C and quite challenging performance wise, especially large signal due to different technologies (such as phempt LNA etc.)

mike_lavoie
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re: Avionic & military applications need -55C operation
mike_lavoie   10/27/2010 2:16:20 PM
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Good Article but a little misleading. the title "Avionic & military applications need -55C operation" lead me to believe that he would cover all IC's or at least a larger percentage than just LDO's. We deal with -55 & even -60 requirements and it is very challenging so how about some tips on how to make commercial grade work at these temperatures. Screening of components, heaters, holding the circuits in reset until temp rises, better heat sinks and fans for hi temp are a few of the techniques we use. I agree with JW, what are the mechanisms that effect components at these temperatures?

BalaLak
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re: Avionic & military applications need -55C operation
BalaLak   10/24/2010 4:54:34 AM
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I agree with the other comment by JMWilliams. The first half of the article is definitely interesting. I'd have liked to see more specific details about effects of low temp (less than -40 degC) operation - in terms of design vs characterization trade-offs, process & material qual challenges.

JMWilliams
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re: Avionic & military applications need -55C operation
JMWilliams   10/21/2010 10:14:31 PM
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This was an interesting article. It would have been more interesting yet, if the author had discussed some more detail on causes and effects of operation of IC's below their rated temperature range. For example, increased conductance of metals and decreased semiconductor carrier mobility might be factors. What about brittleness of chips and packages because of the cold? I don't know . . ..

JMWilliams
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re: Avionic & military applications need -55C operation
JMWilliams   10/21/2010 10:14:00 PM
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This was an interesting article. It would have been more interesting yet, if the author had discussed some more detail on causes and effects of operation of IC's below their rated temperature range. For example, increased conductance of metals and decreased semiconductor carrier mobility might be factors. What about brittleness of chips and packages because of the cold? I don't know . . ..

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