I've been using FCT SN100C for both SMT and TH. I started using this alloy
since May 06. I've run around 30K boards, since, with no problems. Once
dialed-in, the process is very stable, and results very predictable. What I
love the most about this alloy is that the appearance is very similar to the
leaded solder, so there is no need for second criteria for acceptability.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: Monday, April 30, 2007 11:42 AM
To: [log in to unmask]
Subject: [TN] SN100C vs. SAC305
Dear Technos,
I need to know how is this combat evolving. This topic has been brought up
several times, but things change fast right now and there must be more
empirical data on the matter.
What I know regarding the 2 materials can be summarized:
* Pro SN100C: cheaper, better looking, eats less copper in the TH
* One major unknown - the Reliability: SN100C is not available in
solder paste format, therefore the boards would have SAC SMT joints and
SN100C TH joints. This means 2 different materials and since we don't know
how reliable a board with only one material is, should we risk introducing
an extra variable?
I would like to know what your take is. Does anybody mixes the 2 materials?
Any reliability testing done? How long have you been doing it and do you see
RMAs?
Thanks,
Ioan
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