Dear lee
I understand the new version of flash gold is direct immersion on copper.
Is that correct. Has it been tested extensively?
Anil Kher
micro interconnexion pvt. ltd
D3-12A, Corlim Industrial Estate
Corlim, Ilhas , Goa , India 403110
tel: 91-832-2284209/337. fax 2284209/2285271
e mail: [log in to unmask]
Leaders in Gold plated PCBs - selective/ cob
an ISO 9001-2000 Company
-----Original Message-----
From: Lee parker [mailto:[log in to unmask]]
Sent: Monday, November 21, 2005 1:16 AM
Subject: Re: best plated surface finish
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:TechNet
@IPC.ORG>>
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
[log in to unmask]<mailto:[log in to unmask]<mailto:jbabcock@sprayco
ol.com<mailto:[log in to unmask]>>
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