I apologize for the quick/confusing response. The problems in
maintaining an active process is with ENIG and specifically the
deposition (electroless nickel deposition) part of the process. Similar
to copper deposition, the electroless nickel bath is not steady state,
requiring consistent product flow and a high level of maintenance than
the immersion processes. The silver bath is very easy to maintain and
simple to operate. Some of the costs associated with EN are the size of
the line - this line requires many chemical stations consuming a good
deal of space.
ENIG is more than 2X the cost of IS, which is an increasing delta when
the line is not run day to day.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice - 802.257.4571 ext 21
Fax - 802.257.0011
<http://www.vtcircuits.com/>
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Creswick, Steven
Sent: Tuesday, August 15, 2006 1:27 PM
To: [log in to unmask]
Subject: Re: [TN] Immersion Au vs Immersion Ag
Jeff,
Just to make sure that I read your reply correctly - should I infer from
your comments that you believe the IAg process 'likes' to have a
round-the- clock, steady-state flow to keep it stable and that the ENIG
process does not? Or did you mean it the other way around, that the
ENIG likes round-the-clock operation?
Am not all that intimately familiar with either line and did not wish to
"read in" something that was not intended.
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jeffrey Bush
Sent: Tuesday, August 15, 2006 8:23 AM
To: [log in to unmask]
Subject: Re: [TN] Immersion Au vs Immersion Ag
Silver is by far lower cost than ENIG - materials, process and space
needed to maintain a line. Deposition processes are high maintenance
and need to be run day to day. Having to keep this line loaded with
panels influences my view of ENIG performance internally and in the
field.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice - 802.257.4571 ext 21
Fax - 802.257.0011
<http://www.vtcircuits.com/>
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Parsons
Sent: Monday, August 14, 2006 5:59 PM
To: [log in to unmask]
Subject: Re: [TN] Immerison Au vs Immersion Ag
The "price" would depend on the source. If your favorite fabricator
does
not have an in-house Ag line then ENIG may be cheaper or vice versa. If
they have both then, yes, Ag is likely cheaper.
John
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