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March 2000

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Subject:
Re: Vapor Phase reflow chemicals and equipment..
From:
"Vaughan, Ralph H" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 22 Mar 2000 06:38:59 -0800
Content-Type:
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text/plain (56 lines) 
Just curious...what sorts of temperatures/durations do these downhole
drilling electronics see?

Ralph Vaughan

> ----------
> From:         Werner Engelmaier[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;[log in to unmask]
> Sent:         Tuesday, March 21, 2000 7:46 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] Vapor Phase reflow chemicals and equipment..
>
> Hi Steve,
> Downhole drilling electronics sees the most severe operational loading of
> any
> ellectronic assemblies. Design this stuff as robust as possible with the
> least CTE-mismatch as possible, and be careful with the encapsulant
> material
> chosen.
> Vapor phase soldering is a good idea; but, is there nothing between 253
> and
> 215C?
> Good luck!
> Werner Engelmaier
>
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