I'm in a good company then :-)
Vladimir
SENTEC
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca
-----Original Message-----
From: "Wenger, George M." <[log in to unmask]>
Date: Tue, 27 Jan 2009 10:31:28
To: <[log in to unmask]>
Subject: Re: [TN] SnPbAg solder and Immersion Silver PCBs
Vladimir,
Ditto.
Regards,
George
Vladimir,
Ditto.
Regards,
George
George M. Wenger
Andrew Wireless Solutions
Senior Principal FMA/Reliability Engineer
40 Technology Drive, Warren, NJ 07059
(908) 546-4531 (Office) (732) 309-8964 (cell)
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev
Sent: Tuesday, January 27, 2009 9:31 AM
To: [log in to unmask]
Subject: Re: [TN] SnPbAg solder and Immersion Silver PCBs
Hi Kevin,
The main concern about the presence of Ag in solder joints is "Ag
embrittlement". Me personally, I've never seen any signs of it even in
the joints of components with a few microns (not microinches!!!!) thick
layer of Ag.
Now I'm eager to see what Dave Hillman will have to say about it :-)
------Original Message------
From: Kevin Glidden
Sender: TechNet
To: [log in to unmask]
ReplyTo: TechNet E-Mail Forum
ReplyTo: Kevin Glidden
Sent: Jan 27, 2009 08:35
Subject: [TN] SnPbAg solder and Immersion Silver PCBs
Morning all,
Question today about SnPbAg solder. We have always used Sn63Pb37 solder
alloy for all products, with exception of some high temp solders for
special
cases. The lion's share of our PCBs are ImAg finish, 5 to 12
micro-inches,
per IPC-4553. In reading about SnPbAg solder, it appears to be
recommended
for use on SMT components with thin (?) silver finishes. This is to
prevent
the dissolution of the component lead into the solder joint. Drawbacks
appear to be only that the joint is not as shiny and reduced mobility of
the
solder. Is it also considered good practive to use an SnPbAg alloy for
immersion silver PCBs for the same reasons? Any tech articles available
on
this?
Thanks (again!)
Kevin Glidden
Manufacturing Engineer
Luminescent Systems Inc.
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SENTEC
11 Canadian Road, Unit 7.
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Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca
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