hmmm, that is why so many reliability test lab set up in Phoenix.  ;-)
> Jack,
>     Maybe you should move to Phoenix, those boards wouldn't have to work
> at -40... Oh sure, they need to work at +120 or so, but those
> electrons will really move fast when the "ground" is so hot! :-)  On
> the other side of this, will the boards be going through hot and cold
> transitions or just stay in the cold all the time? I'm thinking of
> solder joints and all that thermal up and down if that's the case...
>
> Scott Decker – Senior Analyst, Drafting & Design Services CID+ –
> Electronic Systems Center
> UTC AEROSPACE SYSTEMS
> 3445 S. 5th Street, Suite 170, Phoenix, AZ 85040 U.S.A.
> Tel: 602 308 5957  FAX: 602 243 2347
> [log in to unmask]   www.utcaerospacesystems.com
>
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> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
> Sent: Wednesday, June 01, 2016 11:13 AM
> To: [log in to unmask]
> Subject: [External] Re: [TN] FR4 in COLD environments
>
> LOL. Yep! I can relate to that.
> For electronics reliability in cold weather, just ask the folks at Volvo
> and Saab.
> Inge, if you are out there anywhere, now is your chance to contribute!
> Odin
>
> From: Douglas Pauls [mailto:[log in to unmask]]
> Sent: Wednesday, June 01, 2016 1:10 PM
> To: TechNet E-Mail Forum; Stadem, Richard D.
> Subject: Re: [TN] FR4 in COLD environments
>
> Cedar Rapids, where a day of -50 is consider balmy spring weather.  You
> know it's spring when the Diet Dew starts to melt.
>
>
> Doug Pauls
> Principal Materials and Process Engineer Rockwell Collins
>
> On Wed, Jun 1, 2016 at 1:06 PM, Stadem, Richard D.
> <[log in to unmask]<mailto:[log in to unmask]>> wrote:
> Although they might not work very well in Cedar Rapids, Iowa in the
> wintertime, but that is usually due to the Dew spilled on them the rest of
> the year freezing over.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]<mailto:[log in to unmask]>] On Behalf
> Of Stadem, Richard D.
> Sent: Wednesday, June 01, 2016 12:49 PM
> To: [log in to unmask]<mailto:[log in to unmask]>
> Subject: Re: [TN] FR4 in COLD environments
>
> Other than tin pest and batteries used in backup systems, I know of no
> issues with electronics operating at -40. Automobile electronics operate
> at temperatures well below -40 on a regular basis right here in beautiful
> Minnesota.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]<mailto:[log in to unmask]>] On Behalf
> Of Jack Olson
> Sent: Wednesday, June 01, 2016 12:36 PM
> To: [log in to unmask]<mailto:[log in to unmask]>
> Subject: [TN] FR4 in COLD environments
>
> Has anyone ever heard anything about the reliability of circuit boards in
> cold environments?
> (continuous -40C)
> I couldn't find anything on TechNet or in the Printed Circuits Handbook...
>
> thanks,
> Jack
>
>
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