[PCB_FORUM] Re: Finish: Matte tin vs ENIG ?
- From: "richard moffat" <richard.moffat@xxxxxxxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Tue, 28 Jun 2005 12:22:29 +1200
Oh, RATS!!!
I really meant "a lot of assemblers (if not the majority) do NOT have a proper
understanding..."
Time for me to shut up and do some real work now...
>>> Alexis.Meehan@xxxxxxxxx 28/06/2005 12:17:46 p.m. >>>
IPC has a forum - Leadfree@xxxxxxx
Might be helpful.
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of ext richard moffat
Sent: 27 June, 2005 04:58 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Finish: Matte tin vs ENIG ?
Yes, I agree. Take the issue to your assembler.
My appologies if my original reply was too cynical, but just be warned that
there's a lot of assemblers (if not the majority) have a proper understanding
of the LF process.
One good paper to look at is
http://www.protoexpress.com/content/leadFree.jsp
Does anyone know of any user-groups dedicated to LF? Maybe it's time to start
one.
>>> kmccowan@xxxxxxxxxxxxxx 28/06/2005 7:13:34 a.m. >>>
This is one of those cases that should be brought
before your assembler. They have the most to gain
by you making a choice that is compatible with
their process. If you have not already done so,
I recommend you present the problem to them for
the ideal solution.
Kevin McCowan
Sr. PCB Designer
TSI Telsys
Tom Robinson wrote:
> With LeadFree coming, I'm trying to find out what is the best all around
> finish requirement to put on my fab drawing.
>
> My boards have a 50mil pitch BGA. The soic's down to .4mm pitch.
>
> Matte tin, ENIG ?? I imagine Matte tin would be the cheapest.
>
> Also, with the extra heat needed in reflow, will FR4 be ok?
>
> Any help will be appreciated.
>
> tr :)
>
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