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Date: | Wed, 3 Jun 2015 20:51:08 +0000 |
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And don't forget about the potential for nasty InCu intermetallics! If you
go with indium, nickel plate everything first.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Fenner
Sent: Wednesday, June 03, 2015 4:41 PM
To: [log in to unmask]
Subject: Re: [TN] Solder Alloy SnIn - Working Environmental Conditions:
-100°C to +100°C
In/Sn solidus of 118C is almost certainly too low for 100C working
environment and there is not much benefit in ductility from this alloy at
the other end.
Probably Sn63 might cope in fact, but if you have large TEC mismatch, or
multiple cycles and other it depends stuff you might wish to look at an
In/Pb alloy. These are good for cryogenic apps so plenty in hand and you
have choice of MPs at other end of use scale.
No benefit is without a cost though so you may have some surface finish
issues. To quote myself" it's never just the melting point" when it comes to
alloy choice. Discuss with your specialist supplier.
--
Regards
Mike Fenner
BS&P
M: +44 [0] 7810 526 317
T: +44 [0] 1865 522 663
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ricardo Moncaglieri
Sent: Tuesday, June 02, 2015 10:18 PM
To: [log in to unmask]
Subject: [TN] Solder Alloy SnIn - Working Environmental Conditions: -100°C
to +100°C
Dear Colleagues,
Have to deploy a process and its qualification in order to perform
electrical connections which will be working under temperature variations in
the range of -100°C to +100°C (space application).
We are pointing to SnIn solder alloy.
We are just now starting our investigation in our first steps.
Will be invaluable some advise as per your background so as directing me to
some std and/or paper about best applicable solder alloy and its
qualification method.
Being grateful in advance.
brgds, Ricardo Moncaglieri
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