Jack,
  Why not, you don't have to pay to heat chambers up, just cool em down... :-)
Phoenix, Land of Sun Freaks and Sun Kinks! :-)  Or for you rail fans out there, "Phoenix, where Hot Rail has a whole new meaning!"


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

CONFIDENTIALITY WARNING: This message may contain proprietary and/or privileged information of
UTC Aerospace Systems and its affiliated companies. If you are not the intended recipient please 1) do not disclose, copy,
distribute or use this message or its contents, 2) advise the sender by return e-mail, and 3) delete all copies (including all
attachments) from your computer. Your cooperation is greatly appreciated.
This Document Does Not Contain Export Controlled Technology Or Technical Data.


-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]] 
Sent: Wednesday, June 01, 2016 1:11 PM
To: TechNet E-Mail Forum; Decker, Scott UTAS
Subject: [External] Re: [TN] FR4 in COLD environments

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
>
> CONFIDENTIALITY WARNING: This message may contain proprietary and/or 
> privileged information of UTC Aerospace Systems and its affiliated 
> companies. If you are not the intended recipient please 1) do not 
> disclose, copy, distribute or use this message or its contents, 2) 
> advise the sender by return e-mail, and 3) delete all copies 
> (including all
> attachments) from your computer. Your cooperation is greatly appreciated.
> This Document Does Not Contain Export Controlled Technology Or 
> Technical Data.
>
>
> -----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
>
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or 
> [log in to unmask]<mailto:[log in to unmask]>
> ______________________________________________________________________
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or 
> [log in to unmask]<mailto:[log in to unmask]>
> ______________________________________________________________________
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or 
> [log in to unmask]<mailto:[log in to unmask]>
> ______________________________________________________________________
>
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or 
> [log in to unmask] 
> ______________________________________________________________________
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or 
> [log in to unmask] 
> ______________________________________________________________________
>


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________