See the discussion and the detailed answer by Jennie Hwang on this
subject in the attachment.
Gil Zilber
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dennis Becker
Sent: Wednesday, November 02, 2005 12:24 AM
To: [log in to unmask]
Subject: Re: [TN] SnBi Lead Plating
Bob,
As a supplier, I recommend you contact them if you have concerns.
But fyi,Sn-Bi is our std terminal plating for smaller parts.We have no
reliability issues with Bi.Some customers require it because they
believe it helps to prevent Tin Whiskers.
And according to an IPC sponsored seminar I attended,the concentrations
required to produce low temp melting ophase ar nowhere near as small as
the concentations produced by the 3% Bi contained in a typical Sn-Bi
terminal plating.
Regards
Dennis Becker
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Barr
Sent: Tuesday, November 01, 2005 3:33 PM
To: [log in to unmask]
Subject: [TN] SnBi Lead Plating
We received a last time buy notice from a distributor for a NEC part.
The part is going to a RoHS compliant finish. The information we
received seems to indicate the lead finish will be SnBi. With the
transition from Pb to Pb-free still happening, it seems like a problem
to have Bi on a component lead. Everything I have read says Bi cannot be
mixed with Pb because it forms a low temperature melting alloy. Has
anybody heard of Bi being used in a component lead finish? I'm hoping
this may just be a mis- communication.
Thanks.
Bob
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