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September 2004

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Subject:
Re: lead-free PCB source
From:
Mike Anderson <[log in to unmask]>
Reply To:
(Leadfree Electronics Assembly Forum)
Date:
Wed, 1 Sep 2004 10:11:14 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (82 lines) 
Bev,
You left out ENAG, which is becoming a common alternative to ENIG, for
wirebondable, solderable surfaces.
Mike

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Bev Christian
Sent: Wednesday, September 01, 2004 9:06 AM
To: [log in to unmask]
Subject: Re: [LF] lead-free PCB source


Dear SF,
Your question is extremely broad and I am surprised that you have not sought
out experts in your company that know an incredible amount about this
subject.

In terms of finish ENIG, immersion tin, immersion silver, OSP, HASL (Non
lead containing) and others all work WITHIN CERTAIN MANUFACTURING AND
RELIABILITY CONSTRAINTS.  We can't help you without knowing more about your
product.

Any decent PCB manufacturer should be able to offer you one or more of these
finishes on PCBs with higher Tg values.  But as the British NPL and others
have shown, higher Tg is not enough to stop the potential for conductive
anodic filament growth.

I think you have a lot of homework to do.

sincerely Bev Christian
Research in Motion

-----Original Message-----
From: No Name [mailto:[log in to unmask]]
Sent: September 1, 2004 5:33 AM
To: [log in to unmask]
Subject: [LF] lead-free PCB source


Hello everyone,

Would someone pls recommend PCB suppliers and surface finish for lead-free
PCB fabrication? Thanks for your help.


Regards,
SF

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