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Date: | Fri, 6 Jun 2014 14:09:24 +0000 |
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Hi
Do you offer both design and manufacturing services?
It's key that the product must be designed and specified for the application, you can not take a conventional product, change to high Tg and leadfree soldering and expect it to work. Standard components can work for a short time at elevated temperatures but is not long term reliable even on their maximum rating.
Up to a certain temperature leadfree solder like SAC305 and high Tg FR4 is used but at 170° C I think Polyimide PCB's and high temperature solder with a very high Pb content is more common. Mechanical means of securing components is also common, labour intensive.
There is a lot of info available on the web but I guess the know how to design something that actually work is harder to come by. I'd guess application engineers selling the HT components might be able to help.
From a manufacturing point of view I'd take into account solder temperatures, assembly of odd package types (HT components), manual work like staking, potting, tying etc.
Grunde Gjertsen, Kitron AS, Norway
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
Sent: 5. juni 2014 14:12
To: [log in to unmask]
Subject: Re: [TN] high temp environment
My understanding is that the device can be expected to see 170 C.
regards,
Graham Collins
Senior Process Engineer
Sunsel Systems
(902) 444-7867 ext 211
On 6/4/2014 4:51 PM, Stadem, Richard D. wrote:
> What temperatures will the device see (both external and internal) in the field?
> There are companies that make equipment for monitoring lava temperatures. If they can do that, then the inside of an oil well should be pretty ho hum.....
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
> Sent: Wednesday, June 04, 2014 2:19 PM
> To: [log in to unmask]
> Subject: [TN] high temp environment
>
> Hello Technet!
> We are discussing an opportunity with a customer who is looking at placing an instrument down-hole in an oil well, hence a high temp environment. Are there any good resources around to help me with this one? Obviously I need high temp solder (Sn96Ag4?), the components will have to be carefully picked, and we will need PWBs that will be OK at high temp (polyimide?).
>
> I've got some homework to do! :-)
>
> --
> regards,
>
> Graham Collins
> Senior Process Engineer
> Sunsel Systems
> (902) 444-7867 ext 211
>
>
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