Thanks we are doing some testing of IAG finishes on both current
non-RoHS product and prototype RoHS designs
At to levels, I heard less than 800ppm Pb which is JUST under the limit,
but Cd is above the 100ppm limit.
-----Original Message-----
From: Jeffrey Bush [mailto:[log in to unmask]]
Sent: 20 May 2005 13:29
To: TechNet E-Mail Forum; Burtt, Nigel
Subject: RE: [TN] ENIG Board finish and RoHS
I would advise integrated some IAG testing in with your RoHS evaluation
programs. Much effort in improvements are underway on the chemistry end
and this appears to the a finish that will prevail.
Note: My understand was that the levels of banned subst. in ENIG were
well under the RoHS limits.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice: 802.257.4571.21 Fax: 802.257.0011
http://www.vtcircuits.com
-----Original Message-----
From: Burtt, Nigel [mailto:[log in to unmask]]
Sent: Friday, May 20, 2005 5:05 AM
To: [log in to unmask]
Subject: Re: [TN] ENIG Board finish and RoHS
This has been discussed on this and other forums previously within the
last year.
We have been told certain types of finish chemistry for both ENIG and
Immersion Sn can contain levels of Pb and Cd as stabilising agents and
this can make the material deposited very close to or exceeding the RoHS
limits. However, the chemistry suppliers are working on this and don't
expect this to a problem in the long term. That said, if you want a RoHS
compliant PCB now you had better check with your supplier about the
chemistry they use to make sure they can provide it!
We've used ENIG for years as our finish of choice for SMT/mixed
technology with HASL left for conventional PTH only, but are considering
moving to Immersion Ag as a standard for both on any reasonable volume
RoHS compliant product where shelflife should not be an issue. This
problem with non-RoHS compliant ENIG is part of that decision, but
mostly the occasional batch of ENIG that has solderability problems with
no-clean fluxes is a difficulty that won't go away. Pb-F HASL is
available but not falt enough for SMT I feel and I understand this
process still has its own problems for the PCB manufacturers too - maybe
early days?
Does anyone think Immersion Ag is a very bad idea?
Nigel Burtt
Production Engineering Manager
Dolby Labs - European HQ
Email: [log in to unmask]
Tel: +44 (0)1793 842132 [direct line with voicemail]
Fax: +44 (0)1793 842101
-----Original Message-----
From: Jason Gregory [mailto:[log in to unmask]]
Sent: 19 May 2005 23:17
Subject: Re: ENIG Board finish and RoHS
Methinks that is a really good question.
Jason Gregory
Manufacturing Engineer
Innova Electronics
(281)653-5593
(281)653-5594 fax
(281)212-0844 cell
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Bob Donaldson
Sent: Thursday, May 19, 2005 4:58 PM
To: [log in to unmask]
Subject: [TN] ENIG Board finish and RoHS
I had an interesting question come up. One of my customers questioned
whether ENIG board finishes were RoHS compliant because in their metal
finishing world nickel plating baths commonly used lead in them to help
in the plating. So I asked a boardshop I was working with if the ENIG
processing they were using had lead in the nickel plating baths. They
said it did so we both were wondering if this makes ENIG a non compliant
finish for RoHS. Can someone please shed light on whether this is true
or not?
If it is compliant must the platers remove lead form their baths or is
the concentration so low it falls within the accepted criteria?
Thanks,
Bob D.
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To
unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing
per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask]
or 847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To
unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET
Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the
posts: send e-mail to [log in to unmask]: SET Technet Digest Search the
archives of previous posts at: http://listserv.ipc.org/archives Please
visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
-----------------------------------------
This message (including any attachments) may contain confidential
information intended for a specific individual and purpose. If you are
not the intended recipient, delete this message. If you are not the
intended recipient, disclosing, copying, distributing, or taking any
action based on this message is strictly prohibited.
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To
unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing
per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
