Mike,
Thanks for weighing in - never too late to learn more. Your response is 100% inline with what information I've already been able to locate.
Interestingly, some of the most useful info I've found about terms "halogen" and "halide" and "halide-free" is a 2009 APEX paper "Challenges of Implementing a Halogen-Free PCB Assembly Process", authored by none other than Tim Jensen and Ron Lasky, both of Indium.
Kudos, Indium Corp.
Kevin Glidden
Manufacturing Engineer
Astronics Luminescent Systems Inc.
-----Original Message-----
From: Mike Fenner [mailto:[log in to unmask]]
Sent: Thursday, April 22, 2010 8:14 AM
To: 'TechNet E-Mail Forum'; Glidden, Kevin
Subject: RE: [TN] Flux-Cored Wire Solder: Halide / Halide-Free
My late 2 cents
Overall the industry is moving to halide free materials, but the prime
driver is environmental compliance not reliability. One day soon then this
will be an obsolete area, but for now:
This is possibly a more contentious area than it needs to be, but is
certainly confusing. Terms like "Halide free", "halogen free", "no free
halides" and so on are bandied around as if they are interchangeable when
they are not.
It is useful to know these formulation details (REL0, ROl1 etc) to help make
an informed judgement when selecting materials, especially if subsequent
processes like cleaning coating are to be done.
However within the L0/L1 no clean classification, the primary determinants
as to whether the residues are safe are SIR and electro-migration. There is
no distinction between halide and halide free.
So turning to the questions:
Can you get halide free solder wire now? Yes of course.
Do you really need it, see above.
Do flux /solder manufacturers make compatible product packages, yes.
But to test all possible combos even within a single manufacturer's range
would be a huge task, mixing in those from other suppliers impossible.
Regards
Mike Fenner
Indium Corporation
Europe
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Glidden, Kevin
Sent: Monday, April 19, 2010 4:18 PM
To: [log in to unmask]
Subject: [TN] Flux-Cored Wire Solder: Halide / Halide-Free
Greetings,
I've recently been looking into changing out some solder materials. I was
forced to change solder pastes due to product obsolescence. I am now in the
process of verifying compatibility of the hand soldering fluxes and solders
with the new paste. My current paste is halide-free. My current flux cored
wire solder is not. I asked a supplier about halide-free flux-cored wire
solder and the basic response is that you can get it, but it's really
non-standard, so it's a lot more expensive with larger min-buys. Indeed,
after I looked at a few websites about product offerings, it appears most
flux-cored wire solders are not halide-free. I understand that I can
basically use any materials I like as long as I test it out and can prove my
"recipe" is safe to the overall product reliability, but seemingly
halide-free is a safer way to in general.
So I am wondering:
1) Am I worrying about nothing (matching halide-free paste with halide free
solder wires)?
2) Is it really not all that common to use halide-free flux-cored wire
solders?
As always, thank you in advance...
Kevin Glidden
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