Polyclad 370HR finished in immersion silver will be pretty much bullet
proof.

Kind regards,

John Burke

John

John Burke
Senior Manager - Operations , Optichron
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http://www.optichron.com
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert Walker
Sent: Wednesday, January 18, 2006 9:39 AM
To: [log in to unmask]
Subject: [TN] RoHS board finish

Hi All,

I'm doing my first PCB design that will use lead-free components and I
need
to change my board finish from what I've always used.....HASL. I'm
looking for
 any recommendations or comments on the best board finish to use.

The components used on the design will be a mixture of tin-lead and
lead-free (SAC), so I'm not sure if there is a preferred finish to use
in this  type
of situation. I work in a prototype environment where the boards may be
reworked (BGA removal/replaced) a number of times, so I'm concerned
about the
ability of the finish being able to handle being  reworked/reflowed a
number of
times.

I'd also welcome any recommendations on the type of board material to
use
since it will see an elevated temperature of up to 260C. I've always
just
specified FR4 in the past.

Thanx in advance for any feedback.

Regards,
Bob Walker
[log in to unmask] (mailto:[log in to unmask])

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