Gerry
Sounds like things are going well on your end. I am glad that someone has
found a benefit from ROHS even if it approaches: "I have stopped beating
my spouse".
Actually the cost of Flash Gold from the Chinese Shops I am familiar with
is at least on par with immersion silver and normally below ENIG.
Best regards
Lee
J. L. Parker Ph.D.
JLP Consultants LLC
(804) 779 3389
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gerald Gagnon
Sent: Monday, November 21, 2005 6:28 PM
To: [log in to unmask]
Subject: Re: [TN] best plated surface finish
Lee,
Things are going great now that I'm back on the OEM side of things!
I was just pulling your leg on the immersion silver. One of the hidden
benefits of RoHS (albeit a very questionable one) is that it gives us all
a
chance to re-look at things. After a LOT of very grimey work, immersion
silver and ENIG (ugggh) are looking pretty good. Haven't had a chance to
evaluate Direct Immersion Gold or the newer lead-free HASL finishes yet.
I'd love to use the electroplated nickel/gold flash process instead of
ENIG
for a lot of reasons but the alleged cost scare keeps coming up.....
Next time you're up in the Boston area drop me a line.
Best regards,
Gerry
From: Lee parker <[log in to unmask]>
Reply-To: TechNet E-Mail Forum <[log in to unmask]>, Lee parker
<[log in to unmask]>
To: [log in to unmask]
Subject: Re: [TN] best plated surface finish
Date: Sun, 20 Nov 2005 14:45:30 -0500
Jerry
Hope all is well with you.
I did not mention immersion silver since it has been discussed at length
in
this forum and most are ware that I am a huge advocate of immersion silver
going bask to 1995 when I installed the first such line in North America
at
the AT&T plant in Richmond.
I mentioned Flash Gold because it is a relatively new coating (in its
present format) and is just beginning to catch the attention of the OEMs.
Best regards
Lee
J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389
----- Original Message -----
From: Gerald Gagnon<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Friday, November 18, 2005 6:28 PM
Subject: Re: [TN] best plated surface finish
Lee
Kudos from a long time lurker......
You're absolutely correct. Many many years of OEM experience with this
finish. Lots of fear over purported high cost of gold. There's a few
"application" secrets but it is the ultimate surface finish.
Now that the cat is out of the bag, how come you didn't mention
immersion
silver?
Gerry Gagnon
From: Lee parker <[log in to unmask]<mailto:[log in to unmask]>>
Reply-To: TechNet E-Mail Forum
<[log in to unmask]<mailto:[log in to unmask]>>,
Lee parker
<[log in to unmask]<mailto:[log in to unmask]>>
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Re: [TN] best plated surface finish
Date: Wed, 16 Nov 2005 08:25:34 -0500
John
Another option is flash gold over nickel. Both are plated inline using
an
electrolytic process(as opposed to ENIG). The gold thickness is roughly
two
micro inches. The OEMs that I am familiar with that have used this
finish
have reported very good results.
Most of the PCB suppliers providing this process are in China.
Best regards
Lee
J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389
----- Original Message -----
From: Babcock
John<mailto:[log in to unmask]<mailto:[log in to unmask]>>
To:
[log in to unmask]<mailto:[log in to unmask]<mailto:[log in to unmask]<mailto:TechN
[log in to unmask]>>
Sent: Tuesday, November 15, 2005 7:28 PM
Subject: [TN] best plated surface finish
If somebody wants an extra smooth plating finish using lead free
plating
what material would they use...and what would be the finishing
process?
I've heard HASL is sort of rough...and it really doesn't apply using
silver solder because of the melting temps.
Is ENIG (electroless nickel immersion gold) the way to go to get a
smooth finish?
thanks!
John Babcock
PCB Designer III
Isothermal Systems Research (ISR)
2218 N. Molter Rd
Liberty Lake, WA 99019
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