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Date: | Fri, 29 Dec 2006 11:23:42 -0500 |
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Dave
Concerning gold plating. Many Asian shops use what they call "flash gold"
which is electro plated gold over nickel. Urmi Ray and I gave a paper at
last year's Apex on this technology which has been successfully used be
numerous OEMs.
Best regards
Lee
J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389
----- Original Message -----
From: "David Harman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, December 29, 2006 1:09 AM
Subject: [TN] Questions on ENIG VS gold plating
I need some help in understanding.
Are specified requirements are emersion gold plate per
Mil-G-45204 type 2, gold plating thickness maximum of .00003 inches (30
micro inches) over minimum of .00005 inches (50 micro inches) nickel for our
PCB
Is this a standard that is used widely, any other recommendations?
My supplier has indicated the following.
The specifications you listed in your e-mail do not apply to the ENIG finish
(Immersion Gold, electroless nickel)
Mil -G- 45204 refers to Electroplated Gold, Type 2 is 99.0% purity
IPC 6012B Table 3-2 requirements for ENIG are 1.97 u" minimum immersion gold
and 118 u" minimum of electroless nickel.
Which is a better specification? What would give better quality /
reliability? Is there anyway to correlate the two different specifications.
Can I correlate ENIG specs, to that of gold plating.?
Dave
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