Hi Matthew,
That level of antimony should not have any negative effect on your
process. In fact, some large EMS companies specify SAC alloys with that
level of Sb because it has proven to reduce copper dissolution.
Best regards,
David
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Matthew Park
Sent: Wednesday, October 11, 2006 11:10 AM
To: [log in to unmask]
Subject: Re: [LF] Antimony in Lead Free solder pot
Hi MA/NY, AIM's Davids & LF technetters,
I am a little bit concerned with the presence ( ~ 0.3 to 0.5%) of
antimony in SAC305 selective solder pots. The trend is going up with
weekly measurements using an XFR instrument (, and the copper
concentration trend is also going up to ~1%).
Currently, I sent out some samples to be independently analyzed. At this
time, I am clueless how antimony is introduced into solder pots when
virgin SAC305 has less than 200ppm concentration level.
Matthew S. Park
Vansco Electronics, Inc
1651 North Main St.
Morton IL. USA 61550
G Tel: 309-266-2200
D Tel: 309-266-2288
Fax: 309-266-6674
-----Original Message-----
From: MA/NY DDave [mailto:[log in to unmask]]
Sent: Friday, October 06, 2006 9:29 PM
To: [log in to unmask]; Matthew Park
Subject: Re: Antimony in Lead Free solder pot
Hi Matthew, AIM's DavidS, IPC LF Listservers,
So, in your application, what is happening to increase Sb (Antimony)
concentration in the solder pot. Continual Sb increase is a bit unusual.
Yours in Engineering, Dave
YiEngr, MA/NY DDave
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