Hello everybody,

I got a request for a quite simple design (flex or rigid, still 
undefined) containing two dozens THT LEDs, a resistor and a cable.

Application is anywhere at -196°C (I hope not immerged in Liqid 
Nitrogen), and currently I don't know further details like 
temperature change rates, number of "cycles".

I see possible problems with thermal mismatch (220° difference as 
worst case) together with the severe embrittlement.

Any ideas, experiences, advices, application notes, links to special 
design rules etc.? Any help is severely appreciated, as my "designer 
instinct" is maybe enough for normal or hot stuff, but not for this 
application.

Many thanks in advance
Best wishes
Matthias Mansfeld
--
Matthias Mansfeld Elektronik * Printed Circuit Board Design and 
Assembly
Neithardtstr. 3, D-85540 Haar, GERMANY
Phone: +49-89-4620 0937, Fax: +49-89-4620 0938
Internet: http://www.mansfeld-elektronik.de
OpenPGP: http://www.mansfeld-elektronik.de/gnupgkey/mansfeld.asc
Fingerprint: 6563 057D E6B8 9105 1CE4 18D0 4056 1F54 8B59 40EF


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